logging transit traffic on cisco switch

[arumugasamy]

Team,

I like to log the traffic which is transiting the switch. Pls give the steps for Cisco IOS /XE/nexus switches

Thanks

[Dennis Mink]

are you talking about throughput?  i.e. traffic that get offered/processed on the back plane?

cheers

[arumugasamy]

Dear

There was a routing issue in the enterprise network which contains HQ and DR. HQ 6509E connected to DR via ISP L2 link directly connected.HQ - 192.168.100.1 DR(4500-X) IP 192.168.100.2. when pinging the IP 172.21.2.1 behind the DR switch from HQ PC 192.168.101.101 behind 6509E, request timeout but there is a routing in the table.Tracert is fine.

So I tried in 6509E switch "debug ip packet details 101 (access-list 101 permit ip host 192.168.101.101 host 172.21.2.1, access-list 101 permit ip Host 172.21.2.1 host 192.168.101.101)

with logging enable

logging buffered

term monitor

while pinging HQ to DR , there is no logging on the 6500 or 4500-X.

I tried to enable process switching by no ip route-cache even after also the same issue.

My question was: how to get the log on transit traffic. In this scenarios traffic from the HQ PC to DR  device is transit traffic because this traffic not landing in switch interface but transiting the switch.

In my knowledge, to see the transit traffic we have to enable process switching disabling the fast or CEF switching.

Pls now help me how to see the traffic in the core switch 6509E

Thx