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High amount of input errors on SFP 1000BaseXS interface
Hello all,
I have a trunk connection between a CAT4500 and a C2960G-48TC-L.
On the C2960 end I get a lot of input errors and the amount is increasing. SFP on the 2960 has been replaced and fiber has been tested and gives no problem.
the output of sh int on both devices:
CAT4500
GigabitEthernet1/2 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet Port, address is 0002.****
MTU 9000 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:11, output never, output hang never
Last clearing of "show interface" counters 46w1d
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 152000 bits/sec, 89 packets/sec
5 minute output rate 530000 bits/sec, 124 packets/sec
3201336482 packets input, 380537932017 bytes, 0 no buffer
Received 18120413 broadcasts (16398056 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
4971164533 packets output, 6327491428625 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
C2960
GigabitEthernet0/48 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0024.****
MTU 9000 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX SFP
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 00:23:14
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 2464000 bits/sec, 274 packets/sec
5 minute output rate 278000 bits/sec, 177 packets/sec
315446 packets input, 283622828 bytes, 0 no buffer
Received 29534 broadcasts (0 multicasts)
0 runts, 0 giants, 0 throttles
1839 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 11433 multicast, 0 pause input
0 input packets with dribble condition detected
207546 packets output, 38777952 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
the config of the interfaces is
CAT4500
interface GigabitEthernet1/2
switchport access vlan 100
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1-4093
switchport mode trunk
mtu 9000
C2960
interface GigabitEthernet0/48
switchport access vlan 100
switchport trunk allowed vlan 1-4093
switchport mode trunk
media-type sfp
Any ideas? Your input is very much appreciated.
I have a trunk connection between a CAT4500 and a C2960G-48TC-L.
On the C2960 end I get a lot of input errors and the amount is increasing. SFP on the 2960 has been replaced and fiber has been tested and gives no problem.
the output of sh int on both devices:
CAT4500
GigabitEthernet1/2 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet Port, address is 0002.****
MTU 9000 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:11, output never, output hang never
Last clearing of "show interface" counters 46w1d
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 152000 bits/sec, 89 packets/sec
5 minute output rate 530000 bits/sec, 124 packets/sec
3201336482 packets input, 380537932017 bytes, 0 no buffer
Received 18120413 broadcasts (16398056 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
4971164533 packets output, 6327491428625 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
C2960
GigabitEthernet0/48 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0024.****
MTU 9000 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseSX SFP
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 00:23:14
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 2464000 bits/sec, 274 packets/sec
5 minute output rate 278000 bits/sec, 177 packets/sec
315446 packets input, 283622828 bytes, 0 no buffer
Received 29534 broadcasts (0 multicasts)
0 runts, 0 giants, 0 throttles
1839 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 11433 multicast, 0 pause input
0 input packets with dribble condition detected
207546 packets output, 38777952 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out
the config of the interfaces is
CAT4500
interface GigabitEthernet1/2
switchport access vlan 100
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1-4093
switchport mode trunk
mtu 9000
C2960
interface GigabitEthernet0/48
switchport access vlan 100
switchport trunk allowed vlan 1-4093
switchport mode trunk
media-type sfp
Any ideas? Your input is very much appreciated.
Soulja
Well the configs on the port don't exactly match. The mtu setting on the 4500 to be more specific. Is this for iscsi?
Jumbo frames? So just add the mtu command to your 2960 interface.
ASKER
If i am not mistaken, you can not set the MTU size on an individual interface on the C2960 system. Global configuration has mtu set tot 9000 on all Gigbit interfaces.
switch#sh system mtu
System MTU size is 1500 bytes
System Jumbo MTU size is 9000 bytes
Routing MTU size is 1500 bytes
We have a backup/storage iscsi device on this switch. We have changed the mtu setting to 9000 after discovering these errors on standard mtu settings of 1500. But this had no effect.
switch#sh system mtu
System MTU size is 1500 bytes
System Jumbo MTU size is 9000 bytes
Routing MTU size is 1500 bytes
We have a backup/storage iscsi device on this switch. We have changed the mtu setting to 9000 after discovering these errors on standard mtu settings of 1500. But this had no effect.
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ASKER
Thanks for your assistance
ASKER
There was a faulty pachtpanel involved.