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VIP Purple

BGP flows source & destination not showing with ´show ip cache flow´

Hello,

I have configured netflow on my router, when I do a ´show ip cache flow´ I can see the flows for BGP, but I cannot see the source and destination for those BGP flows, that is, the last line is empty. When I ping the other side, I can see the src and dst just fine. Does anybody have an idea on how to configure Netflow so that the source and destination shows, or is this possibly the default behaviour for BGP packets ?

I am grateful for any help.

GP

6 REPLIES
Cisco Employee

Re: BGP flows source & destination not showing with ´show ip ca

Hello Georg,

This is normal behavior. The information with IP address at the bottom is actually for active flows. This information is removed for flows that have been inactive for more than 15 seconds.

Hope this helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
New Member

Re: BGP flows source & destination not showing with ´show ip ca

Hi guys,

I have a question on netflow on the routers. What kind of a appliation is there to use for export of data from the flow?

Also, would this be recommendaed for a Cisco 2621 router? because I assume this is a very cpu intensive process.

THx,

Masood

Cisco Employee

Re: BGP flows source & destination not showing with ´show ip ca

There is many different software you can use to collect and analyse netflow information.

Here are some links to some Cisco and partners applications:

Cisco Applications:

http://www.cisco.com/warp/public/732/Tech/nmp/netflow/partners/applications/

Partners Commercial Applications:

http://www.cisco.com/warp/public/732/Tech/nmp/netflow/partners/commercial/

Partners Freeware:

http://www.cisco.com/warp/public/732/Tech/nmp/netflow/partners/freeware/

Hope this helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
New Member

Re: BGP flows source & destination not showing with ´show ip ca

Thanks, I am sure it will help.

Masood

VIP Purple

Re: BGP flows source & destination not showing with ´show ip ca

Hello,

thanks for the answer. The problem is that I do not see anything even after clearing BGP, and after setting the inactive timeout to a higher value. I see the number of flows for BGP increasing, but no source and destination.

GP

Cisco Employee

Re: BGP flows source & destination not showing with ´show ip ca

can you post the relevant netflow configuration. Also what version of IOS are you running.

Thanks,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
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