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Webcast-Catalyst9k
New Member

Sniffer Logs

Hi All,

When i sniff a serial T1 line using Sniffer Book.i see only frames..what could be the reason i see only frames ?

we use mgx to terminate the spans.

Actually i want to check for the source and destination ip address.

Thanks in advance

Madan

4 REPLIES
Silver

Re: Sniffer Logs

As I rememeber, there is a software come w/ the Sniffer can interpert the output log to read-able message.

Hope this helps.

New Member

Re: Sniffer Logs

normally it s an option: capture all frame or just layer2 header.

any way you can use the net-flow feature to capture details about layer3/4.

router#configure terminal

router-2621(config)#interface serial0

router-2621(config-if)#ip route-cache flow

router-2621(config-if)#exit

router-2621(config)#ip flow-export destination 192.168.9.101 9996

router-2621(config)#ip flow-export source FastEthernet 0/1

router-2621(config)#ip flow-export version 5

router-2621(config)#ip flow-cache timeout active 1

then you should use some free software that can capture netflow packets like http://manageengine.adventnet.com/products/netflow/download.html

New Member

Re: Sniffer Logs

Hi Jackyoung,

Thanks for the reply.

I have checked the logs in the sniffer book software.

But in our case we enabled mux on the Multilink bundle.is this a reason that we are not able to see packet.

Thanks

Madan

Silver

Re: Sniffer Logs

What I think the issue is where do you probe the link, before the mux or after the mux. If before the mux, it should able to monitor the link.

I am sorry that I did not try it, so I can't help too much.

Did you check w/ the Sniffer provider, they should have more instruction in this case.

Hope this helps.

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