topic Re: Procurve 2910 not learning mac addresses in Switches, Hubs, and Modems

Procurve 2910 not learning mac addresses

Alfred van den Born — Mon, 13 Sep 2010 10:14:50 GMT

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.

Re: Procurve 2910 not learning mac addresses

Alfred van den Born — Tue, 14 Sep 2010 11:08:25 GMT

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.

Re: Procurve 2910 not learning mac addresses

zmichl — Tue, 14 Sep 2010 11:20:06 GMT

What command do you use to show the arp table?

Re: Procurve 2910 not learning mac addresses

Alfred van den Born — Tue, 14 Sep 2010 11:24:50 GMT

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

Re: Procurve 2910 not learning mac addresses

zmichl — Tue, 14 Sep 2010 11:25:59 GMT

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

Re: Procurve 2910 not learning mac addresses

Alfred van den Born — Tue, 14 Sep 2010 11:28:04 GMT

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

Re: Procurve 2910 not learning mac addresses

zmichl — Tue, 14 Sep 2010 11:30:45 GMT

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?

Re: Procurve 2910 not learning mac addresses

Alfred van den Born — Tue, 14 Sep 2010 11:33:06 GMT

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

Re: Procurve 2910 not learning mac addresses

zmichl — Tue, 14 Sep 2010 11:34:11 GMT

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

Re: Procurve 2910 not learning mac addresses

Alfred van den Born — Tue, 14 Sep 2010 11:39:05 GMT

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?

Re: Procurve 2910 not learning mac addresses

Alfred van den Born — Tue, 14 Sep 2010 11:43:47 GMT

both arp and mac age were configured to 5 minutes. I have changed them back to defaults, let you know the results

Re: Procurve 2910 not learning mac addresses

zmichl — Tue, 14 Sep 2010 11:47:06 GMT

Sry, I always mix up arp-age and mac-age on the switches.
Of course I mean you should change mac-agetime instead of arp-age :)

Re: Procurve 2910 not learning mac addresses

Alfred van den Born — Tue, 14 Sep 2010 11:48:39 GMT

ah, ok, mac age time was already on default value, only the arp age time was modified.

Re: Procurve 2910 not learning mac addresses

Alfred van den Born — Tue, 14 Sep 2010 11:57:40 GMT

Here's the config of one of the switches;
; J9145A Configuration Editor; Created on release #W.14.38

hostname "####"
time timezone 60
time daylight-time-rule Western-Europe
module 1 type J9145A
module 2 type J9165A
module 3 type J9165A
stack commander "####"
stack auto-grab
stack member 1 mac-address 0024A8E302C0
##interface configs removed##
trunk A1,B1 Trk50 LACP
ip default-gateway ####
vlan 1
name "Management"
untagged 1
qos priority 7
ip address ####
tagged Trk50
no untagged 2-24
exit
vlan 16
name "###"
untagged 2-3,7,9-10,12,15-16,Trk50
ip address ####
tagged 4-5
exit
vlan 2
name "###"
untagged 20-24
tagged Trk50
no ip address
exit
vlan 4
name "###"
untagged 6,8,18-19
no ip address
exit
vlan 3
name "###"
no ip address
exit
vlan 5
name "DMZ"
tagged 4-5,11,13-14,17,Trk50
no ip address
exit
vlan 1016
name "###"
tagged 4-5,11,13-14,17,Trk50
no ip address
exit
vlan 101
name "Temporary vlan"
no ip address
exit
fault-finder bad-driver sensitivity high
fault-finder bad-transceiver sensitivity high
fault-finder bad-cable sensitivity high
fault-finder too-long-cable sensitivity high
fault-finder over-bandwidth sensitivity high
fault-finder broadcast-storm sensitivity high
fault-finder loss-of-link sensitivity high
fault-finder duplex-mismatch-HDx sensitivity high
fault-finder duplex-mismatch-FDx sensitivity high
instrumentation monitor mac-moves med
instrumentation monitor mac-address-count med
instrumentation monitor learn-discards med
instrumentation monitor pkts-to-closed-ports med
instrumentation monitor ip-address-count med
instrumentation monitor arp-requests med
instrumentation monitor system-resource-usage med
instrumentation monitor login-failures med
instrumentation monitor port-auth-failures med
instrumentation monitor system-delay med
instrumentation monitor log
logging #####
qos queue-config 2-queues
timesync sntp
sntp unicast
sntp 60
sntp server priority 1 ####
ip timep manual #### interval 5
snmp-server community "public" unrestricted
snmp-server host #### "public" all
snmp-server host #### "public" all
snmp-server trap-source ####
snmp-server contact ###
spanning-tree
no spanning-tree 1 auto-edge-port
spanning-tree 1 root-guard
spanning-tree Trk50 priority 4
spanning-tree priority 1 force-version rstp-operation
primary-vlan 16

Re: Procurve 2910 not learning mac addresses

Alfred van den Born — Tue, 14 Sep 2010 14:33:27 GMT

reloaded the switches on firmware 14.49 solved the issue. Thanks for all reply's

Re: Procurve 2910 not learning mac addresses

zmichl — Tue, 14 Sep 2010 15:45:46 GMT

I updates from .38 to .49 a few days ago, but I never had these problems. However, there is some strange behaviour on procurve stuff sometimes :)

Re: Procurve 2910 not learning mac addresses

Alfred van den Born — Wed, 15 Sep 2010 07:18:43 GMT

Yeah I agree with that, hopefully it does not happen again, don't like switches converting to a hub ;-). Thanks for your support.