Dragon0x40
asked on
Output drops Cisco 2821 Router
I have a T1 connected to the s0/0/0 port at a remote site and incrementing Total Output drops.
Slow response time from remote site users crossing the T1 trying to access network drives.
Should I suspect the T1 or the Router?
REMOTE SITE
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206VXR Se1/4:0 via Time Warner ID# - xxx
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 104/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 1d00h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1010
Queueing strategy: Class-based queueing
Output queue: 12/1000/64/1010 (size/max total/threshold/drops)
Conversations 3/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 2000 bits/sec, 3 packets/sec
5 minute output rate 631000 bits/sec, 267 packets/sec
104675 packets input, 15522596 bytes, 0 no buffer
Received 10253 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
15145387 packets output, 2796007775 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206VXR Se1/4:0 via Time Warner ID# - xxx
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 130/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 1d00h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1019
Queueing strategy: Class-based queueing
Output queue: 11/1000/64/1019 (size/max total/threshold/drops)
Conversations 2/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 0 bits/sec, 1 packets/sec
5 minute output rate 790000 bits/sec, 281 packets/sec
104775 packets input, 15540232 bytes, 0 no buffer
Received 10260 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
15164242 packets output, 2806863702 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
-------------------------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- --
LOCAL ROUTER
7206VXR#sh int serial 1/4:0
Serial1/4:0 is up, line protocol is up
Hardware is Multichannel T1
Description: T1 to 2821 s0/0/0 via- TimeWarner Cir#xxxx
Internet address is xx.xxx.xxx.1/24
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 42/255
Encapsulation HDLC, crc 16, Data non-inverted
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:01, output hang never
Last clearing of "show interface" counters 8w1d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/220/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 640 kilobits/sec
5 minute input rate 258000 bits/sec, 138 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
735057999 packets input, 87861423 bytes, 0 no buffer
Received 575893 broadcasts, 417741 runts, 0 giants, 0 throttles
3928704 input errors, 202452 CRC, 0 frame, 0 overrun, 0 ignored, 1894555 abort
5481009 packets output, 844209969 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
4 carrier transitions
no alarm present
Timeslot(s) Used:1-24, subrate: 64Kb/s, transmit delay is 0 flags
7206VXR#sh int serial 1/4:0
Serial1/4:0 is up, line protocol is up
Hardware is Multichannel T1
Description: T1 to 2821 s0/0/0 via- TimeWarner Cir#xxxx
Internet address is xx.xxx.xxx.1/24
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 37/255
Encapsulation HDLC, crc 16, Data non-inverted
Keepalive set (10 sec)
Last input 00:00:01, output 00:00:01, output hang never
Last clearing of "show interface" counters 8w1d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/220/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 640 kilobits/sec
5 minute input rate 223000 bits/sec, 130 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
735077699 packets input, 91406267 bytes, 0 no buffer
Received 575910 broadcasts, 417741 runts, 0 giants, 0 throttles
3928704 input errors, 202452 CRC, 0 frame, 0 overrun, 0 ignored, 1894555 abort
5481120 packets output, 844244513 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
4 carrier transitions
no alarm present
Timeslot(s) Used:1-24, subrate: 64Kb/s, transmit delay is 0 flags
Slow response time from remote site users crossing the T1 trying to access network drives.
Should I suspect the T1 or the Router?
REMOTE SITE
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206VXR Se1/4:0 via Time Warner ID# - xxx
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 104/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 1d00h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1010
Queueing strategy: Class-based queueing
Output queue: 12/1000/64/1010 (size/max total/threshold/drops)
Conversations 3/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 2000 bits/sec, 3 packets/sec
5 minute output rate 631000 bits/sec, 267 packets/sec
104675 packets input, 15522596 bytes, 0 no buffer
Received 10253 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
15145387 packets output, 2796007775 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206VXR Se1/4:0 via Time Warner ID# - xxx
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 130/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 1d00h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1019
Queueing strategy: Class-based queueing
Output queue: 11/1000/64/1019 (size/max total/threshold/drops)
Conversations 2/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 0 bits/sec, 1 packets/sec
5 minute output rate 790000 bits/sec, 281 packets/sec
104775 packets input, 15540232 bytes, 0 no buffer
Received 10260 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
15164242 packets output, 2806863702 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
--------------------------
LOCAL ROUTER
7206VXR#sh int serial 1/4:0
Serial1/4:0 is up, line protocol is up
Hardware is Multichannel T1
Description: T1 to 2821 s0/0/0 via- TimeWarner Cir#xxxx
Internet address is xx.xxx.xxx.1/24
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 42/255
Encapsulation HDLC, crc 16, Data non-inverted
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:01, output hang never
Last clearing of "show interface" counters 8w1d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/220/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 640 kilobits/sec
5 minute input rate 258000 bits/sec, 138 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
735057999 packets input, 87861423 bytes, 0 no buffer
Received 575893 broadcasts, 417741 runts, 0 giants, 0 throttles
3928704 input errors, 202452 CRC, 0 frame, 0 overrun, 0 ignored, 1894555 abort
5481009 packets output, 844209969 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
4 carrier transitions
no alarm present
Timeslot(s) Used:1-24, subrate: 64Kb/s, transmit delay is 0 flags
7206VXR#sh int serial 1/4:0
Serial1/4:0 is up, line protocol is up
Hardware is Multichannel T1
Description: T1 to 2821 s0/0/0 via- TimeWarner Cir#xxxx
Internet address is xx.xxx.xxx.1/24
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 37/255
Encapsulation HDLC, crc 16, Data non-inverted
Keepalive set (10 sec)
Last input 00:00:01, output 00:00:01, output hang never
Last clearing of "show interface" counters 8w1d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/220/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 640 kilobits/sec
5 minute input rate 223000 bits/sec, 130 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
735077699 packets input, 91406267 bytes, 0 no buffer
Received 575910 broadcasts, 417741 runts, 0 giants, 0 throttles
3928704 input errors, 202452 CRC, 0 frame, 0 overrun, 0 ignored, 1894555 abort
5481120 packets output, 844244513 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
4 carrier transitions
no alarm present
Timeslot(s) Used:1-24, subrate: 64Kb/s, transmit delay is 0 flags
ASKER
thanks spazztik69,
I will have the T1 tested.
The input drops on the local router are not incrementing, only the output drops on the remote router are incrementing.
looks like more packets are processed switched than Fast switched.
#sh int s0/0/0 stats
Serial0/0/0
Switching path Pkts In Chars In Pkts Out Chars Out
Processor 86721 15809147 92079 16190522
Route cache 30744 1967616 17138384 3193492924
Total 117465 17776763 17230463 3209683446
I will have the T1 tested.
The input drops on the local router are not incrementing, only the output drops on the remote router are incrementing.
looks like more packets are processed switched than Fast switched.
#sh int s0/0/0 stats
Serial0/0/0
Switching path Pkts In Chars In Pkts Out Chars Out
Processor 86721 15809147 92079 16190522
Route cache 30744 1967616 17138384 3193492924
Total 117465 17776763 17230463 3209683446
ASKER
I meant to say the input errors on the local router are not incrementing.
is there any QOS config on the remote router? is cef enabled?
ASKER
CEF is enabled and there is some QOS
I also pinged but could not get the output drops to increment until I made the packets larger than 1500 bytes.
ip cef
!
class-map match-all VoIP
match ip dscp ef
class-map match-any Signaling
match ip dscp cs3
!
!
policy-map XXXXX
class VoIP
priority percent 20
class Signaling
bandwidth percent 5
class class-default
fair-queue
random-detect dscp-based
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206vxr se1/4:0 Time Warner ID# - XXX
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 53/255, rxload 147/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 02:20:10
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 210
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/210 (size/max total/threshold/drops)
Conversations 0/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 895000 bits/sec, 345 packets/sec
5 minute output rate 323000 bits/sec, 238 packets/sec
849951 packets input, 331368770 bytes, 0 no buffer
Received 981 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1773014 packets output, 354862014 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206vxr se1/4:0 Time Warner ID# - XXX
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 48/255, rxload 137/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 02:21:37
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 210
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/210 (size/max total/threshold/drops)
Conversations 0/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 835000 bits/sec, 332 packets/sec
5 minute output rate 296000 bits/sec, 226 packets/sec
876503 packets input, 338548286 bytes, 0 no buffer
Received 991 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1790915 packets output, 357399178 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206vxr se1/4:0 Time Warner ID# - XXX
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 51/255, rxload 140/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 02:21:59
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 210
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/210 (size/max total/threshold/drops)
Conversations 0/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 849000 bits/sec, 338 packets/sec
5 minute output rate 309000 bits/sec, 232 packets/sec
885449 packets input, 341427340 bytes, 0 no buffer
Received 994 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1797315 packets output, 358647949 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
2821#ping
Protocol [ip]:
Target IP address: xx.xxx.xxx.1
Repeat count [5]: 1000
Datagram size [100]: 1500
Timeout in seconds [2]:
Extended commands [n]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 1000, 1500-byte ICMP Echos to xx.xxx.xxx.1, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (1000/1000), round-trip min/avg/max = 16/24/96 ms
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206vxr se1/4:0 Time Warner ID# - XXX
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 56/255, rxload 152/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 02:22:59
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 210
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/210 (size/max total/threshold/drops)
Conversations 0/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 925000 bits/sec, 352 packets/sec
5 minute output rate 344000 bits/sec, 245 packets/sec
908753 packets input, 350939964 bytes, 0 no buffer
Received 1001 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1813665 packets output, 362235331 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
2821#ping
Protocol [ip]:
Target IP address: xx.xxx.xxx.1
Repeat count [5]: 1000
Datagram size [100]: 2000
Timeout in seconds [2]:
Extended commands [n]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 1000, 2000-byte ICMP Echos to xx.xxx.xxx.1, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!!! !!!!
!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (1000/1000), round-trip min/avg/max = 24/50/172 ms
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206vxr se1/4:0 Time Warner ID# - XXX
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 78/255, rxload 169/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 02:24:17
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 221
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/221 (size/max total/threshold/drops)
Conversations 0/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 1026000 bits/sec, 374 packets/sec
5 minute output rate 477000 bits/sec, 270 packets/sec
941496 packets input, 363864232 bytes, 0 no buffer
Received 1009 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1838800 packets output, 371410651 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
I also pinged but could not get the output drops to increment until I made the packets larger than 1500 bytes.
ip cef
!
class-map match-all VoIP
match ip dscp ef
class-map match-any Signaling
match ip dscp cs3
!
!
policy-map XXXXX
class VoIP
priority percent 20
class Signaling
bandwidth percent 5
class class-default
fair-queue
random-detect dscp-based
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206vxr se1/4:0 Time Warner ID# - XXX
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 53/255, rxload 147/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 02:20:10
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 210
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/210 (size/max total/threshold/drops)
Conversations 0/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 895000 bits/sec, 345 packets/sec
5 minute output rate 323000 bits/sec, 238 packets/sec
849951 packets input, 331368770 bytes, 0 no buffer
Received 981 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1773014 packets output, 354862014 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206vxr se1/4:0 Time Warner ID# - XXX
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 48/255, rxload 137/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 02:21:37
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 210
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/210 (size/max total/threshold/drops)
Conversations 0/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 835000 bits/sec, 332 packets/sec
5 minute output rate 296000 bits/sec, 226 packets/sec
876503 packets input, 338548286 bytes, 0 no buffer
Received 991 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1790915 packets output, 357399178 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206vxr se1/4:0 Time Warner ID# - XXX
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 51/255, rxload 140/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 02:21:59
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 210
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/210 (size/max total/threshold/drops)
Conversations 0/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 849000 bits/sec, 338 packets/sec
5 minute output rate 309000 bits/sec, 232 packets/sec
885449 packets input, 341427340 bytes, 0 no buffer
Received 994 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1797315 packets output, 358647949 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
2821#ping
Protocol [ip]:
Target IP address: xx.xxx.xxx.1
Repeat count [5]: 1000
Datagram size [100]: 1500
Timeout in seconds [2]:
Extended commands [n]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 1000, 1500-byte ICMP Echos to xx.xxx.xxx.1, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (1000/1000), round-trip min/avg/max = 16/24/96 ms
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206vxr se1/4:0 Time Warner ID# - XXX
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 56/255, rxload 152/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 02:22:59
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 210
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/210 (size/max total/threshold/drops)
Conversations 0/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 925000 bits/sec, 352 packets/sec
5 minute output rate 344000 bits/sec, 245 packets/sec
908753 packets input, 350939964 bytes, 0 no buffer
Received 1001 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1813665 packets output, 362235331 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
2821#ping
Protocol [ip]:
Target IP address: xx.xxx.xxx.1
Repeat count [5]: 1000
Datagram size [100]: 2000
Timeout in seconds [2]:
Extended commands [n]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 1000, 2000-byte ICMP Echos to xx.xxx.xxx.1, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (1000/1000), round-trip min/avg/max = 24/50/172 ms
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206vxr se1/4:0 Time Warner ID# - XXX
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 78/255, rxload 169/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 02:24:17
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 221
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/221 (size/max total/threshold/drops)
Conversations 0/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 1026000 bits/sec, 374 packets/sec
5 minute output rate 477000 bits/sec, 270 packets/sec
941496 packets input, 363864232 bytes, 0 no buffer
Received 1009 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1838800 packets output, 371410651 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
sounds like one end can't handle fragmented packets or you have a tunneling protocol running over the link that can't handle it's traffic being fragmented. Are you running a tunnel (GRE, IPSEC, ETC.) over this connection?
ASKER
I don't think we are running a tunnel. How could I check for sure?
There seems to be a pretty heavy transmit load from the local 7206vxr to the remote site 2801 router.
We may be installing another T1 between the sites to increase bandwidth.
Do you think that will help?
7206vxr#sh int s1/4:0
Serial1/4:0 is up, line protocol is up
Hardware is Multichannel T1
Description: T1 to 2821 - TimeWarner Cir#xxx
Internet address is xx.xxx.xxx.1/24
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 255/255, txload 241/255, rxload 53/255
Encapsulation HDLC, crc 16, Data non-inverted
Keepalive set (10 sec)
Last input 00:00:02, output 00:00:00, output hang never
Last clearing of "show interface" counters 8w4d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 10603
Queueing strategy: weighted fair
Output queue: 73/1000/64/10603 (size/max total/threshold/drops)
Conversations 12/220/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 640 kilobits/sec
5 minute input rate 324000 bits/sec, 259 packets/sec
5 minute output rate 1452000 bits/sec, 371 packets/sec
778172214 packets input, 3776802814 bytes, 0 no buffer
Received 613453 broadcasts, 1302543 runts, 0 giants, 0 throttles
12478433 input errors, 641281 CRC, 0 frame, 0 overrun, 0 ignored, 6020574 abort
52218107 packets output, 2232309442 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
4 carrier transitions
no alarm present
Timeslot(s) Used:1-24, subrate: 64Kb/s, transmit delay is 0 flags
7206vxr#sh run int serial1/4:0
interface Serial1/4:0
description T1 to 2821 - TimeWarner Cir#xxx
ip address xx.xxx.xxx.1 255.255.255.0
service-policy output XXX
ip route-cache flow
no ip route-cache cef
ip ospf cost 18
ip mroute-cache
end
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206vxr Se1/4:0Time Warner ID#xxx
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 53/255, rxload 237/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 3d00h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 2038
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/2038 (size/max total/threshold/drops)
Conversations 0/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 1441000 bits/sec, 369 packets/sec
5 minute output rate 326000 bits/sec, 253 packets/sec
46681267 packets input, 1381025580 bytes, 0 no buffer
Received 30638 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
34310276 packets output, 2074900542 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
2821#sh run int s0/0/0
interface Serial0/0/0
description To 7206vxr Se1/4:0Time Warner ID#xxx
ip address xx.xxx.xxx.2 255.255.255.0
no ip mroute-cache
ip ospf cost 18
service-module t1 fdl ansi
service-policy output xxx
end
There seems to be a pretty heavy transmit load from the local 7206vxr to the remote site 2801 router.
We may be installing another T1 between the sites to increase bandwidth.
Do you think that will help?
7206vxr#sh int s1/4:0
Serial1/4:0 is up, line protocol is up
Hardware is Multichannel T1
Description: T1 to 2821 - TimeWarner Cir#xxx
Internet address is xx.xxx.xxx.1/24
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 255/255, txload 241/255, rxload 53/255
Encapsulation HDLC, crc 16, Data non-inverted
Keepalive set (10 sec)
Last input 00:00:02, output 00:00:00, output hang never
Last clearing of "show interface" counters 8w4d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 10603
Queueing strategy: weighted fair
Output queue: 73/1000/64/10603 (size/max total/threshold/drops)
Conversations 12/220/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 640 kilobits/sec
5 minute input rate 324000 bits/sec, 259 packets/sec
5 minute output rate 1452000 bits/sec, 371 packets/sec
778172214 packets input, 3776802814 bytes, 0 no buffer
Received 613453 broadcasts, 1302543 runts, 0 giants, 0 throttles
12478433 input errors, 641281 CRC, 0 frame, 0 overrun, 0 ignored, 6020574 abort
52218107 packets output, 2232309442 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
4 carrier transitions
no alarm present
Timeslot(s) Used:1-24, subrate: 64Kb/s, transmit delay is 0 flags
7206vxr#sh run int serial1/4:0
interface Serial1/4:0
description T1 to 2821 - TimeWarner Cir#xxx
ip address xx.xxx.xxx.1 255.255.255.0
service-policy output XXX
ip route-cache flow
no ip route-cache cef
ip ospf cost 18
ip mroute-cache
end
2821#sh int s0/0/0
Serial0/0/0 is up, line protocol is up
Hardware is GT96K with integrated T1 CSU/DSU
Description: To 7206vxr Se1/4:0Time Warner ID#xxx
Internet address is xx.xxx.xxx.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 53/255, rxload 237/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 3d00h
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 2038
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/2038 (size/max total/threshold/drops)
Conversations 0/232/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 773 kilobits/sec
5 minute input rate 1441000 bits/sec, 369 packets/sec
5 minute output rate 326000 bits/sec, 253 packets/sec
46681267 packets input, 1381025580 bytes, 0 no buffer
Received 30638 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
34310276 packets output, 2074900542 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
2821#sh run int s0/0/0
interface Serial0/0/0
description To 7206vxr Se1/4:0Time Warner ID#xxx
ip address xx.xxx.xxx.2 255.255.255.0
no ip mroute-cache
ip ospf cost 18
service-module t1 fdl ansi
service-policy output xxx
end
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ASKER
thanks koudry,
What does this show?
7206vxr#show policy-map interface serial1/4:0
Serial1/4:0
Service-policy output: Palxxxx
Class-map: VoIP (match-all)
0 packets, 0 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: ip dscp ef
Queueing
Strict Priority
Output Queue: Conversation 264
Bandwidth 512 (kbps) Burst 12800 (Bytes)
(pkts matched/bytes matched) 0/0
(total drops/bytes drops) 0/0
Class-map: Signaling (match-all)
793 packets, 48450 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: ip dscp cs3
Queueing
Output Queue: Conversation 265
Bandwidth 5 (%) Max Threshold 64 (packets)
(pkts matched/bytes matched) 120/7104
(depth/total drops/no-buffer drops) 0/0/0
Class-map: class-default (match-any)
873069 packets, 137846033 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: any
Queueing
Flow Based Fair Queueing
Maximum Number of Hashed Queues 256
(total queued/total drops/no-buffer drops) 0/16/0
exponential weight: 9
dscp Transmitted Random drop Tail drop Minimum Maximum Mark
pkts/bytes pkts/bytes pkts/bytes thresh thresh prob
af11 2938/270296 0/0 0/0 32 40 1/10
af12 0/0 0/0 0/0 28 40 1/10
af13 0/0 0/0 0/0 24 40 1/10
af21 0/0 0/0 0/0 32 40 1/10
af22 0/0 0/0 0/0 28 40 1/10
af23 0/0 0/0 0/0 24 40 1/10
af31 0/0 0/0 0/0 32 40 1/10
af32 0/0 0/0 0/0 28 40 1/10
af33 0/0 0/0 0/0 24 40 1/10
af41 0/0 0/0 0/0 32 40 1/10
af42 0/0 0/0 0/0 28 40 1/10
af43 0/0 0/0 0/0 24 40 1/10
cs1 0/0 0/0 0/0 22 40 1/10
cs2 0/0 0/0 0/0 24 40 1/10
cs3 0/0 0/0 0/0 26 40 1/10
cs4 0/0 0/0 0/0 28 40 1/10
cs5 0/0 0/0 0/0 30 40 1/10
cs6 327848/79139700 0/0 0/0 32 40 1/10
cs7 0/0 0/0 0/0 34 40 1/10
ef 0/0 0/0 0/0 36 40 1/10
rsvp 0/0 0/0 0/0 36 40 1/10
default 239848/39062033 16/24064 0/0 20 40 1/10
What does this show?
7206vxr#show policy-map interface serial1/4:0
Serial1/4:0
Service-policy output: Palxxxx
Class-map: VoIP (match-all)
0 packets, 0 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: ip dscp ef
Queueing
Strict Priority
Output Queue: Conversation 264
Bandwidth 512 (kbps) Burst 12800 (Bytes)
(pkts matched/bytes matched) 0/0
(total drops/bytes drops) 0/0
Class-map: Signaling (match-all)
793 packets, 48450 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: ip dscp cs3
Queueing
Output Queue: Conversation 265
Bandwidth 5 (%) Max Threshold 64 (packets)
(pkts matched/bytes matched) 120/7104
(depth/total drops/no-buffer drops) 0/0/0
Class-map: class-default (match-any)
873069 packets, 137846033 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: any
Queueing
Flow Based Fair Queueing
Maximum Number of Hashed Queues 256
(total queued/total drops/no-buffer drops) 0/16/0
exponential weight: 9
dscp Transmitted Random drop Tail drop Minimum Maximum Mark
pkts/bytes pkts/bytes pkts/bytes thresh thresh prob
af11 2938/270296 0/0 0/0 32 40 1/10
af12 0/0 0/0 0/0 28 40 1/10
af13 0/0 0/0 0/0 24 40 1/10
af21 0/0 0/0 0/0 32 40 1/10
af22 0/0 0/0 0/0 28 40 1/10
af23 0/0 0/0 0/0 24 40 1/10
af31 0/0 0/0 0/0 32 40 1/10
af32 0/0 0/0 0/0 28 40 1/10
af33 0/0 0/0 0/0 24 40 1/10
af41 0/0 0/0 0/0 32 40 1/10
af42 0/0 0/0 0/0 28 40 1/10
af43 0/0 0/0 0/0 24 40 1/10
cs1 0/0 0/0 0/0 22 40 1/10
cs2 0/0 0/0 0/0 24 40 1/10
cs3 0/0 0/0 0/0 26 40 1/10
cs4 0/0 0/0 0/0 28 40 1/10
cs5 0/0 0/0 0/0 30 40 1/10
cs6 327848/79139700 0/0 0/0 32 40 1/10
cs7 0/0 0/0 0/0 34 40 1/10
ef 0/0 0/0 0/0 36 40 1/10
rsvp 0/0 0/0 0/0 36 40 1/10
default 239848/39062033 16/24064 0/0 20 40 1/10
The above output shows the following information:
(1) There is no traffic coming under the VoIP class
There are no packets classified and there is no offered rate. This does not necessarily mean that your voice traffic isn't working. This may depend on how the VoIP class map is configured and what network it is covering.
(2) There are some packets classified under your voice signalling queue: Signaling
When the output was taken, there was no traffic going through the router because the offered rate was zero (0). It is possible that voice traffic is being detected here but again this depends on what is configured under the Signaling queue.
(3) There is unusually a high volume of data under the default queue.
The default queue is normally used to capture anything that falls through the other queues. In the above output you have:
* CS6 or DSCP 48 - this is for routing traffic, i.e. not customer traffic
* AF11 or DSCP 10 - this is for file /bulk transfer
* default or DSCP 0 - this is internet traffic
As you can see, there is a cloud around your voice traffic. This is the bit that worries me. I think the thing you need to do, is to identify the various traffic types going through your routers. I can see that there is voice, so you are right to track voice using the DSCP EF. You need to test EF and make sure that your EF queue (VoIP) is capturing your EF traffic. If you have a VoIP phone, then you can just make a call with the phone attached to your router and while you are at it, do "show policy-map int" on the WAN to see if you can find any packets under the VoIP queue.
If you do not have VoIP phones to test with, you can send simulate the voice traffic using "IP precedence 5" in your extended ping.
I suspect your problem is the QoS design. It needs tuning. The whole idea is to make most of the bandwidth that you have and protect any traffic such as voice and sacrifice anything else that isn't important.
Good luck
Koudry
(1) There is no traffic coming under the VoIP class
There are no packets classified and there is no offered rate. This does not necessarily mean that your voice traffic isn't working. This may depend on how the VoIP class map is configured and what network it is covering.
(2) There are some packets classified under your voice signalling queue: Signaling
When the output was taken, there was no traffic going through the router because the offered rate was zero (0). It is possible that voice traffic is being detected here but again this depends on what is configured under the Signaling queue.
(3) There is unusually a high volume of data under the default queue.
The default queue is normally used to capture anything that falls through the other queues. In the above output you have:
* CS6 or DSCP 48 - this is for routing traffic, i.e. not customer traffic
* AF11 or DSCP 10 - this is for file /bulk transfer
* default or DSCP 0 - this is internet traffic
As you can see, there is a cloud around your voice traffic. This is the bit that worries me. I think the thing you need to do, is to identify the various traffic types going through your routers. I can see that there is voice, so you are right to track voice using the DSCP EF. You need to test EF and make sure that your EF queue (VoIP) is capturing your EF traffic. If you have a VoIP phone, then you can just make a call with the phone attached to your router and while you are at it, do "show policy-map int" on the WAN to see if you can find any packets under the VoIP queue.
If you do not have VoIP phones to test with, you can send simulate the voice traffic using "IP precedence 5" in your extended ping.
I suspect your problem is the QoS design. It needs tuning. The whole idea is to make most of the bandwidth that you have and protect any traffic such as voice and sacrifice anything else that isn't important.
Good luck
Koudry
ASKER
How can you tell that there is voice traffic across this link?
Class-map: VoIP (match-all)
0 packets, 0 bytes "(no traffic is matching this class?)"
5 minute offered rate 0 bps, drop rate 0 bps "(5 minute snapshot?)"
Match: ip dscp ef
Queueing
Strict Priority
Output Queue: Conversation 264
Bandwidth 512 (kbps) Burst 12800 (Bytes)
(pkts matched/bytes matched) 0/0 "(number of packets matched when congested?)"
(total drops/bytes drops) 0/0
Class-map: Signaling (match-all)
793 packets, 48450 bytes "(793 packets matching this class?)"
5 minute offered rate 0 bps, drop rate 0 bps "(no traffic matches in the last 5 minutes?)"
Match: ip dscp cs3
Queueing
Output Queue: Conversation 265
Bandwidth 5 (%) Max Threshold 64 (packets)
(pkts matched/bytes matched) 120/7104 "( 120 packets matched when congested?)"
(depth/total drops/no-buffer drops) 0/0/0
Class-map: class-default (match-any)
873069 packets, 137846033 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: any
Queueing
Flow Based Fair Queueing
Maximum Number of Hashed Queues 256
(total queued/total drops/no-buffer drops) 0/16/0
exponential weight: 9
Class-map: VoIP (match-all)
0 packets, 0 bytes "(no traffic is matching this class?)"
5 minute offered rate 0 bps, drop rate 0 bps "(5 minute snapshot?)"
Match: ip dscp ef
Queueing
Strict Priority
Output Queue: Conversation 264
Bandwidth 512 (kbps) Burst 12800 (Bytes)
(pkts matched/bytes matched) 0/0 "(number of packets matched when congested?)"
(total drops/bytes drops) 0/0
Class-map: Signaling (match-all)
793 packets, 48450 bytes "(793 packets matching this class?)"
5 minute offered rate 0 bps, drop rate 0 bps "(no traffic matches in the last 5 minutes?)"
Match: ip dscp cs3
Queueing
Output Queue: Conversation 265
Bandwidth 5 (%) Max Threshold 64 (packets)
(pkts matched/bytes matched) 120/7104 "( 120 packets matched when congested?)"
(depth/total drops/no-buffer drops) 0/0/0
Class-map: class-default (match-any)
873069 packets, 137846033 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: any
Queueing
Flow Based Fair Queueing
Maximum Number of Hashed Queues 256
(total queued/total drops/no-buffer drops) 0/16/0
exponential weight: 9
Hello,
Your default class seems to be getting a lot of data, so I suspect it is getting the voice data, if you are sending voice because the VoIP class is not getting your voice data. You may need to modify your QoS config as follows:
class-map match-all VoIP
match ip dscp ef
class-map match-any Signaling
match ip dscp cs3
!-----------------------
Class-map match-all VoIP
match protocol rtp audio
match access-group name YourVoiceNetwork_ACL
!
ip access-list extended YourVoiceNetwork_ACL
permit ip xx.xx.4.64 0.0.0.15 any
!------------------------- ---------- ---------- ---------- ---------- ----
NB: in this example xx,xx.4.64/28 is used as a dummy network - please replace with your voice network network, i.e. the network being used by your VoIP phones.
I am not sure what you want to do with the Signalling class. It is matching CS3 which has a DSCP of 26. Do you know what traffic you are tracking with this class?
Thanks.
Koudry
Your default class seems to be getting a lot of data, so I suspect it is getting the voice data, if you are sending voice because the VoIP class is not getting your voice data. You may need to modify your QoS config as follows:
class-map match-all VoIP
match ip dscp ef
class-map match-any Signaling
match ip dscp cs3
!-----------------------
Class-map match-all VoIP
match protocol rtp audio
match access-group name YourVoiceNetwork_ACL
!
ip access-list extended YourVoiceNetwork_ACL
permit ip xx.xx.4.64 0.0.0.15 any
!-------------------------
NB: in this example xx,xx.4.64/28 is used as a dummy network - please replace with your voice network network, i.e. the network being used by your VoIP phones.
I am not sure what you want to do with the Signalling class. It is matching CS3 which has a DSCP of 26. Do you know what traffic you are tracking with this class?
Thanks.
Koudry
for the output drops that is typically caused by a congested interface or QOS configuration problem. check out http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a0080094791.shtml for more info and some troubleshooting steps.
one way to quick test is to shutdown or unplug the Ethernet on the local side and see if the drops/errors go away with no traffic. .then pass a bunch of ping packets from one side of the circuit to the other and see if they start occurring again. if they don't bring the Ethernet up and see if they start occurring again.
also, if you have active smartnet on the routers don't hesitate to call cisco tac and let them help you figure it out. you pay a lot of money for the coverage if you have it.