Procurve 2910 not learning mac addresses

[Alfred van den Born]

We have 2 stacked 2910 switches, ip routing is disabled and RSTP enabled. Problem we have is that the mac address tables are empty. No errors are logged on the switches.

[Alfred van den Born]

We plan to update the firmware today to see if this makes any difference. Strange thing there are no mac addresses at all in the table.

[zmichl]

What command do you use to show the arp table?

[Alfred van den Born]

for the arp table, "show arp"
for the mac address list "show mac-address"

[zmichl]

and a 'show mac-address all' gives you no mac-addresses?

[Alfred van den Born]

yes, that's correct. we also experience some performance issues which I think are related.

[zmichl]

This sounds strange, if the switch has not been misconfigured by someone...

However, you should ensure that learning mode is "continous" on all ports: ' port-security all learn-mode continuous'.

If that doesnt help, can you post the switch config?

[Alfred van den Born]

I already checked the last, all are in continuous mode. I'll post the config.

[zmichl]

You could also try to reset the arp-age setting back to the default: "ip arp-age 20"

[Alfred van den Born]

I indeed changed the default arp age to 5 minutes. I'll change it back to 20, to test, but can you please explain why I should change it back?