On a production Nexus 5K, I noticed the following piece of config:
interface Vlan1
mac-address 0000.0000.0000
This is the entire Vlan1 stanza. What does this accomplish?
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2Are you the only technician that has access to this switch? I'm wondering if someone manually put this in there. If that is a possibility, I may be able to give you additional insight.– Ryan FoleyCommented Mar 7, 2014 at 8:09
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@Fizzle That is the case -- there are other people with access, and I suspect this was manually put in to address ... something. Initially I discovered this as I was auditing configs and sync between 5Ks.– belacquaCommented Mar 7, 2014 at 22:25
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Is there a Cisco ACE on the subnet? How about a Layer 3 card? We ran into an issue on a Nexus 7k where there was strange interaction between vPC, ACE and pinging SVIs that required statically setting the SVI MAC Address– Ben MasonCommented Mar 31, 2014 at 12:58
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No ACE on the subnet, so unfortunately can't be that bug. Thanks.– belacquaCommented Mar 31, 2014 at 23:12
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1It could be an attempt to disable vlan 1 by someone who mistakenly thought that was a good thing to do on a cisco switch.– Todd WilcoxCommented Mar 19, 2015 at 2:21
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1 Answer
Might be related to this known bug?
