Span configuration on cisco switches

[aslam.bajwa]

Hi All

i have configured SPAN on cisco 4900 series switches its a Loacal SPAN . as there is only commnads to complete this activity but hard luck its not working .

is there any way to debug it or troubleshoot it .

please advise

[John Blakley]

What's not working and can you describe what you're seeing? Also, can you paste the commands that you've configured?

[aslam.bajwa]

Hi thanks for reply ,

commands :

monitor session 1 sourse int gi 0/1

monitor session 1 destination int gi 0/10

i can not see the traffic of gi 0/1 on wireshark (PC connected on gi 0/10)

destination interface is with default configuration .

[John Blakley]

What type of traffic are you trying to see? If it's L2 traffic, you may need to use "encapsulation replicate" at the end of your destination line. Also, make sure that you're listening on the correct interface in wireshark.

[aslam.bajwa]

HI ,

i was trying to cature ICPM traffic .

[johnlloyd_13]

hi,

i agree with John B, try to reconfigure using the 'replicate' keyword.

Switch(config)#monitor session 1 destination interface g0/10 encapsulation replicate

alternatively, try sniffing the source VLAN.

Switch(config)#monitor session 1 source vlan