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Ignored Packets in VLan 1

Posted on 2012-04-06
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Last Modified: 2012-05-13
Hi all,
 
I have a Cisco WS-C2950-48,  and I have incrementing throttles and ignored on  VLAN 1 interface.  Vlan 1 is a managament interface, some time
when I try to Access I can't.
 
2950#show int vlan 1
Vlan1 is up, line protocol is up
  Internet address is 10.0.0.146/16
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  30 second input rate 36000 bits/sec, 52 packets/sec
  30 second output rate 17000 bits/sec, 23 packets/sec
     297870558 packets input, 1596814696 bytes, 0 no buffer
     Received 195554838 broadcasts (0 IP multicast)
     0 runts, 0 giants, 1607875 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 98455174 ignored
     76743540 packets output, 3185572576 bytes, 0 underruns
     0 output errors, 2 interface resets
     0 output buffer failures, 0 output buffers swapped out
 
Clients are not having any troubles.
 
 
CPU utilization it's OK.
 
 
Thanks in advance.
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Question by:BCN_2012
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Expert Comment

by:Nayyar HH (CCIE RS)
ID: 37815749
Can you post "show ip traffic" output ?
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Author Comment

by:BCN_2012
ID: 37815860
Yes, thanks for reply,

show ip traffic
IP statistics:
  Rcvd:  1074460 total, 152824 local destination
         0 format errors, 0 checksum errors, 0 bad hop count
         0 unknown protocol, 921636 not a gateway
         0 security failures, 0 bad options, 51 with options
  Opts:  0 end, 0 nop, 0 basic security, 0 loose source route
         0 timestamp, 0 extended security, 0 record route
         0 stream ID, 0 strict source route, 51 alert, 0 cipso
         0 other
  Frags: 0 reassembled, 0 timeouts, 0 couldn't reassemble
         0 fragmented, 0 couldn't fragment
  Bcast: 140851 received, 3 sent
  Mcast: 0 received, 0 sent
  Sent:  12442 generated, 0 forwarded
  Drop:  382 encapsulation failed, 0 unresolved, 0 no adjacency
         0 no route, 0 unicast RPF, 0 forced drop
  Drop:  0 packets with source IP address zero

ICMP statistics:
  Rcvd: 0 format errors, 0 checksum errors, 0 redirects, 5 unreachable
        1693 echo, 440 echo reply, 0 mask requests, 0 mask replies, 0 quench
        0 parameter, 0 timestamp, 0 info request, 0 other
        0 irdp solicitations, 0 irdp advertisements
  Sent: 0 redirects, 0 unreachable, 440 echo, 1693 echo reply
        0 mask requests, 0 mask replies, 0 quench, 0 timestamp
        0 info reply, 0 time exceeded, 0 parameter problem
        0 irdp solicitations, 0 irdp advertisements

UDP statistics:
  Rcvd: 147949 total, 0 checksum errors, 140851 no port
  Sent: 7407 total, 0 forwarded broadcasts

TCP statistics:
  Rcvd: 2737 total, 0 checksum errors, 2 no port
  Sent: 2904 total

ARP statistics:
  Rcvd: 2827378 requests, 45 replies, 0 reverse, 0 other
  Sent: 361 requests, 1724 replies (0 proxy), 0 reverse
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LVL 15

Expert Comment

by:Nayyar HH (CCIE RS)
ID: 37819913
I think there might be a host on VLAN1 sending excessive broadcast,

65% of packets received on VLAN1 is broadcast

Try to track down the host by finding out which connected port in VLAN1 has a very high "received broadcast" value

Command:

sh interfaces | i lan|ther|broad

You could look to enable broadcast storm-control
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LVL 15

Expert Comment

by:Nayyar HH (CCIE RS)
ID: 37819919
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Accepted Solution

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BCN_2012 earned 0 total points
ID: 37821004
Hi, thanks for reply again,

I think there is a memory problem in switch:

show buffers failures
Caller       Pool          Size      When
0x802D7634  Large            170    08:07:37
0x802D7634  Huge             170    08:07:37
0x802D7634  Middle           170    07:07:37
0x802D7634  Middle           170    05:33:54
0x802D7634  Middle           170    03:56:43
0x802D7634  Middle           170    03:56:43
0x802D7634  Middle           170    00:12:26
0x802D7634  Middle           178    00:12:26
0x802D7634  Middle           170    00:12:26
0x802D7634  Middle           170    00:12:26

2950#show region address 0x802D7634
Address 0x802D7634 is located physically in :
 
  Name  : text
  Class : IText
  Media : R/W
  Start : 0x80010000
  End   : 0x8056FA63
  Size  : 0x0055FA64
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Author Closing Comment

by:BCN_2012
ID: 37961895
Good answers
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