C2960X-24TS-L -The same MAC address in multiple VLANs

[Markus Dommer]

 Is it possible to use the same MAC address in multiple VLANs on a Catalyst 2960X-24TS-L?

[Martin Hruby · Accepted solution]

Hello Markus

If you're asking whether it's possible to configure the same MAC address on multiple SVI or L3 interfaces of a switch, then that depends on the platform and supervisor you're using. Have a look at this article: http://www.cisco.com/c/en/us/support/docs/switches/catalyst-6000-series-switches/41263-catmac-41263.html

If you're asking whether the same MAC address can actually be present in multiple VLANs, the answer is yes, for example:

Switch# show mac address-table dynamic

Unicast Entries
 vlan   mac address     type        protocols               port
-------+---------------+--------+---------------------+--------------------
  97    7081.0526.c383   dynamic ip,ipx,assigned,other Port-channel7
  99    7081.0526.c383   dynamic ip,ipx,assigned,other Port-channel7
 211    7081.0526.c383   dynamic ip,ipx,assigned,other Port-channel7
 221    7081.0526.c383   dynamic ip,ipx,assigned,other Port-channel7
 230    7081.0526.c383   dynamic ip,ipx,assigned,other Port-channel7
 298    7081.0526.c383   dynamic ip,ipx,assigned,other Port-channel7
 810    7081.0526.c383   dynamic ip,ipx,assigned,other Port-channel7
1000    7081.0526.c383   dynamic ip,ipx,assigned,other Port-channel7
1087    7081.0526.c383   dynamic ip,ipx,assigned,other Port-channel7

Best regards,
Martin

[Markus Dommer]

Hallo Martin,

that's just what I was thinking.

Thanks for the reply

Markus