limit-learning doesn't work on stack with EXOS 15.3.1.4

[Ilya_Semenov]

Hello, everybody!

I have a mixed stack of x440 and x460 g1 switches.

I want to configure limit-learning for a certain port.

I say: configure port 3:9 vlan v12 limit-learning 1 action stop-learning

I connect laptop to this port and get an IP. Then I change to another laptop ang get an IP again!

What am I doing wrong?

show fdb port 3:9 show that MACs are changing (and these are laptops MACs)

show port 3:9 info detail show:

MAC-limit = 1, Action = stop-learning.

But nothing happens! I connect third laptop and it gets IP too.

When I say "configure port 3:9 vlan v12 lock-learning" it blocks the port.

Could you please help me with this issue?

Many thanks in advance,

Ilya

[Ilya_Semenov]

Evening, everyone!

I've tried to implement such a configuration on my 16.2 stack:

enable mac-locking
enable mac-locking ports 5:17
configure mac-locking ports 5:17 first-arrival limit-learning 1
configure mac-locking ports 5:17 first-arrival link-down-action retain-macs
configure mac-locking ports 5:17 log violation on
configure mac-locking ports 5:17 learn-limit-action disable-port

Everything works as expected, but I want to ensure that it will keep working after rebooting the switch!

Many thanks to all participants of this discussion!!!!

[Necheporenko__N]

Hello Ilya,

You stacks are running XOS image affected with next CR's:
xos0057211 - Traffic gets forwarded for blackholed MAC address when limit learning enabled.
xos0054065 - Switch fails to recognize previously learnt MAC Addresses when configuring the features - MAC Lockdown and Limit Learning

Updating EXOS to the latest 15.3 patch should solve the issue.

Best Regards,
Nikolay

[Ilya_Semenov]

Ya pryamo hochu dva laika postavit, potomu cho eto desyatiy, navernoe, bag, na kotoriy ya natikayus, pomipo obnarujennih mnoy lichno i podtverzhdenniy mezhdunarodnim TACom. Zaprosil u distukov poslednyuyu zaplatku...

Zbazibo.

[Ronald_Dvorak]

https://community.extremenetworks.com/extreme/topics/how-can-i-tell-the-switch-to-lock-the-first-lea...