Questions on logging in Nexus 7010 6.x

[Christopher Bell]

We recently replaced our core switch from a non-cisco vendor with a Nexus 7010.  With our old core switch, I had the ability to log changes to the ARP table.  So if there was a dhcp conflict or a vMotion event, it would show up in the "show log" output.  I've not found a way to do that with the Nexus switch - or at least no way to view the log.  I have the command:

logging level arp 6

To be frank, I've not explored the logging capabilites of this switch as much as I probably should have yet so any help will be greatly appreciated.

If this posts answers your question or is helpful, please consider rating it and/or marking as answered.       

[dominic.caron]

I've enabled LLDP on the network et on servers. The output in the logs are like this:

2012 Sep 18 15:08:40.925 XXXXXXXXXX %LLDP-5-SERVER_ADDED: Server with Chassis ID 2c27.d716.2669 Port ID X2 management address 10.9.8.125 discovered on local port Eth1/22 in vlan 0 with enabled capability None

Now, if I could only get the server admin to complete the LLDP config, I could have the hostname of the server and not only the management IP and the MAC....work in progess.

[Christopher Bell]

Hi Dominic,

Are you suggesting that LLDP has to be running to log changes to the ARP table?

If this posts answers your question or is helpful, please consider rating it and/or marking as answered.

[dominic.caron]

There is also this command:

mac address-table notification mac-move

Nerver tried it because I wanted the info on the server identity.

[Christopher Bell]

Yeah, I've tried that one - and it doesn't seem to ever give me the info I'm looking for.

If this posts answers your question or is helpful, please consider rating it and/or marking as answered.

[dominic.caron]

Did you configure le logging level for l2fm to notification?

[Christopher Bell]

No, I dont' believe I have.  Do you have the commands or a link to a configuration example?

If this posts answers your question or is helpful, please consider rating it and/or marking as answered.

[dominic.caron]

logging level facility severity-level

facility is l2fm and level is 5 for notification I think.

[Christopher Bell]

I made that change, I will test Monday morning to see if that fixes my issue.  Thanks for your help.

If this posts answers your question or is helpful, please consider rating it and/or marking as answered.