Solved: mac-learn disable

sel18 · ‎02-02-2022

Hi team,

Please I want to be sure that the command "mac-learn disable" in SW NX 9K disable the reading of the MAC address without any impact for our VLAN or infra.

Thanks in advance.

Sergiu.Daniluk · ‎02-14-2022

ERSPAN is the best option here. Basically the mirrored traffic will be encapsulated in GRE and forwarded directly to the destination IP address.

Here is how to configure it: https://www.letsconfig.com/how-to-configure-erspan-on-cisco-nexus-switches/

Here is how to decode it: https://packetpushers.net/erspan-new-favorite-packet-capturing-trick/

Stay safe,

Sergiu

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Sergiu.Daniluk · ‎02-02-2022

Hi @sel18

Seems like disabling mac learning is supported in 10.2.X.

<\CORRECTION>

Anyway, why would you like to disable the mac learning? That is like converting your switch to a hub. Even if you could do this on you N9K switch, I would suggest you do not.

Apart of that, normally, there should be no impact because of flooding, but the only potential problem which I have in mind is over-subscription, which could lead to packet drops.

Thanks,

Sergiu

sel18 · ‎02-09-2022

@Sergiu.Daniluk

thank you for your reply. yes NX didn't support the mac-learn that's why i want to ask about the the ERSPAN or RSPAN in Cisco.

my goal is the mirroring of the traffic.

thanks in advance.

Sergiu.Daniluk · ‎02-09-2022

If traffic mirroring is what you are looking for, then SPAN/RSPAN/ERSPAN or Nexus Data Broker are your friends, depending on what exactly you want to do.

Take care,

Sergiu

sel18 · ‎02-11-2022

thanks @Sergiu.Daniluk

I want to know about the SPAN/RSPAN/ERSPAN from NX 9K to SW Catalyset ( it mean that ERSPAN in source only) is that possible with ERSPAN L2 traffic or not ?

regards.