IOS embedded packet capture command ?

[pfrancis3]

Hello, I have an 881 router and I want to capture traffic on one of it's switchports.

Can someone please confirm if I can use the IOS embedded packet capture commands to capture traffic an 881 switchport or can this only be done on a Layer 3 interface.

Thanks for any information.

[Vinit Jain]

Hello

Yes, you can configure EPC for switchport on 881 series router.

monitor capture buffer test circular 
  monitor  capture  buffer test limit duration 10
  monitor capture point ip cef test fastEthernet 0 both 
  monit capture point associate test test
  monitor capture point test start
  monitor capture point start test

881-1#show inv
NAME: "881-V", DESCR: "881-V chassis, Hw Serial#: FCZ1543C0L6, Hw Revision: 1.0"
PID: C881-V-K9         , VID: V01, SN: FCZ1543C0L6

NAME: "ESW Power Daughter Card", DESCR: "4-Port ESW Power Daughter Card"
PID: 800-IL-PM-2       , VID: V03, SN: FOC15320AF2

Hope this answers

Regards

Vinit

[pfrancis3]

thanks. Will this packet capture feature sniff DHCP layer 2 traffic ? i.e. DHCP requests and replies or does it only sniff layer 3 traffic ?

Thank you.

[Vinit Jain]

Yes, you should be able to capture even Layer 2 traffic.