[c-nsp] Cisco1900 routing packets with destination MAC all zero?

rako rakovsk at gmail.com
Mon May 8 05:25:28 EDT 2017

Interface config is very simple:

interface GigabitEthernet0/0
 ip address ......
 ipv6 address .....
 no ip proxy-arp
 no mop enabled
 duplex auto
 speed auto

The question is really why destination MAC 0000.0000.0000 passes behind
PHY/mac_filter on this platform and whether such behavior should be
generally considered wrong.
It's not the case on other Cisco platforms.


2017-05-08 10:57 GMT+02:00 Saku Ytti <saku at ytti.fi>:

> Hey,
> I'm not sure why this is relevant?
> OP is asking if frame should have passed PHY/mac_filter, If L3 port
> receives frame, it does not care about L2 headers, it'll just forward
> it based on L3, and generates new L2 rewrite on egress.

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