Catalyst 8300 router doesn't support SPAN session

[ozswong]

Hello all,

I'm new to the Cisco Catalyst 8300 router platform.

We have a C8300-1N1S-4T2X running 17.9.5a. There are two 1Gbps WAN links which are terminated on te0/0/4 and te0/0/5. I have a server connecting to one of four copper ports.

When I tried to configure the source port (e.g. te0/0/4) or destination port (g0/0/1), I got the following errors.

Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#monitor session 1 source interface te0/0/4
Only NGIO switch is supported for Local SPAN.
SPAN Session Validation failed.

Router(config)#monitor session 1 destination interface g0/0/1
Only NGIO switch is supported for Local SPAN.
SPAN Session Validation failed.

Router(config)#end
Router#exit

I tried to search the Internet but couldn't find any resolutions regarding the output.

Please help.

Regards, Steven

[Torbjørn · Accepted solution]

Regular SPAN is only supported for switches, or for the 8300 only on the optional NIM switch as the error message refers to. You will have to configure an ERSPAN or set up a embedded packet capture depending on your goals. Good luck! 

[ozswong]

Hi @Torbjørn

Thanks for your advice. ERSPAN looks to be more suitable for my requirement.

I am trying to avoid a tap aggregation setup in the site to minimize the infrastructure footprint.

[Torbjørn]

Great! ERSPAN is very useful and should suit you well. Let me know how it goes.

[ozswong]

Thanks @Torbjørn 

I'm still waiting for another team to deliver me a port for the ERSPAN on the Nexus switch. It is a remote site and I think they may take a few more weeks if not days before I can test it. However, I tested the ERSPAN configuration which looks okay. I will give an update here if I encounter other problems. Much appreciate for your help!