Remote SPAN - Source Nexus 9300 (nx-os 9.3.3) Destination Catalyst 3750X

[TONY SMITH]

Hi,

I'm trying to see if there's a way to SPAN a port on Nexus 9300 to a destination port on Catalyst 3750X.   I think I've reached a road block in that the Catalyst supports only RSPAN VLAN, while it seems that the Nexus only supports ERSPAN and can't even create a Remote Span VLAN.

Is that correct or am I missing something?   NX-OS documentation suggests it's possible, but I've seem community comments saying RSPAN isn't supported on the N9Ks.

Any workarounds possible?

Thanks,  Tony S

[Francesco Molino · Accepted solution]

Hi
You're not missing anything. Nexus doesn't sorry rspan but erspan instead. 3750x doesn't support erspan.
You can configure erspan on Nexus and put your wireshark machine ip as destination.
The advantage of erspan is that you can route this traffic across your network.

[TONY SMITH]

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@Francesco Molino wrote:
You can configure erspan on Nexus and put your wireshark machine ip as destination.

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That is the answer!  I just set it up and confirmed it's working. 

[Francesco Molino]

Glad you have it working!