[c-nsp] Unidirectional CDP traffic

[Martin Komon]

IMHO something makes it to London, as seen in the counters:
> LIXCORML01#sh int gi3/16
>   5 minute output rate 1000 bits/sec, 1 packets/sec
>      0 packets input, 287503 bytes, 0 no buffer
Maybe the encapsulation/framing is screwed, thus no packets are recognized.

My $0.02,

Martin

On 3/31/2011 2:01 PM, Daniel Dib wrote:
> On to, mar 31, 2011 at 13:50:33, Gökhan Gümüş wrote:
>> Subject: Re: [c-nsp] Unidirectional CDP traffic
>>
>> Hi Daniel,
>>
>> Thanks for this.
>> Actually interfaces are all working as trunk port however they 
>> configured like this.
>>
>> We cleared counters and made ping tests.
>> Please see our test results below,
>>
>>
>> Clearing counters:
>>
>>
>> === London ===
>> LIXCORML01#cle count gi3/16
>> Clear "show interface" counters on this interface [confirm] 
>> LIXCORML01#p 10.119.44.150
>>
>> Type escape sequence to abort.
>> Sending 5, 100-byte ICMP Echos to 10.119.44.150, timeout is 2 seconds:
>> .....
>> Success rate is 0 percent (0/5)
>>
>> LIXCORML01#sh int gi3/16
>>
>> GigabitEthernet3/16 is up, line protocol is up (connected)
>>   Hardware is Gigabit Ethernet Port, address is 68ef.bd4f.ccd7 (bia
>> 68ef.bd4f.ccd7)
>>   Description: abc
>>   MTU 1500 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 force-up, media type is 
>> 1000BaseLH
>>   input flow-control is on, output flow-control is on
>>   ARP type: ARPA, ARP Timeout 04:00:00
>>   Last input never, output never, output hang never
>>   Last clearing of "show interface" counters 00:00:21
>>   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 0 bits/sec, 0 packets/sec
>>   5 minute output rate 1000 bits/sec, 1 packets/sec
>>      0 packets input, 287503 bytes, 0 no buffer
>>      Received 0 broadcasts (0 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
>>      38 packets output, 2720 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
>>
>> LIXCORML01#sh cdp nei gi3/16
>> Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
>>                   S - Switch, H - Host, I - IGMP, r - Repeater, P - 
>> Phone,
>>                   D - Remote, C - CVTA, M - Two-port Mac Relay
>>
>> Device ID        Local Intrfce     Holdtme    Capability  Platform
>> Port
>> ID
>> LIXCORML01#
>> ===
>>
>> === Stockholm ===
>>
>>
>> SOXCORML01#cle count gi3/11
>> Clear "show interface" counters on this interface [confirm] 
>> SOXCORML01#p 10.119.44.149
>>
>> Type escape sequence to abort.
>> Sending 5, 100-byte ICMP Echos to 10.119.44.149, timeout is 2 seconds:
>> .....
>> Success rate is 0 percent (0/5)
>>
>> SOXCORML01#sh int gi3/11
>> GigabitEthernet3/11 is up, line protocol is up (connected)
>>   Hardware is Gigabit Ethernet Port, address is 68ef.bd4f.c51e (bia
>> 68ef.bd4f.c51e)
>>   Description: abc
>>   MTU 1500 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 force-up, media type is 
>> 1000BaseLH
>>   input flow-control is on, output flow-control is on
>>   ARP type: ARPA, ARP Timeout 04:00:00
>>   Last input 00:00:00, output never, output hang never
>>   Last clearing of "show interface" counters 00:00:21
>>   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 0 bits/sec, 0 packets/sec
>>   5 minute output rate 0 bits/sec, 0 packets/sec
>>      35 packets input, 2910 bytes, 0 no buffer
>>      Received 35 broadcasts (35 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
>>      53 packets output, 3776 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
>>
>> SOXCORML01#sh cdp nei gi3/11
>> Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
>>                   S - Switch, H - Host, I - IGMP, r - Repeater, P - 
>> Phone,
>>                   D - Remote, C - CVTA, M - Two-port Mac Relay
>>
>> Device ID        Local Intrfce     Holdtme    Capability  Platform
>> Port
>> ID
>> LIXCORML01.nd.barcapint.com <http://lixcorml01.nd.barcapint.com/>
>>                  Gig 3/11          133             R S I  WS-C4900M Gig
>> 3/16
>> SOXCORML01#
>> ===
>>
>> Thanks in advance.
>>
>> Gokhan
>>
>>
> 
> Traffic is flowing from London to STHLM and STHLM is responding as seen by
> counters. If you debug ICMP you should see that STHLM is receving an echo
> request and sending an echo reply. However the traffic never makes it back
> to London. I think you need to troubleshoot your WDM network. Do you have
> any counters available there?
> 
> /Daniel
> 
> 
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