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[SOLVED] LACP Issues

Posted: Thu Jan 14, 2016 4:41 pm
by lweidig
We recently decided to create a LAG between the switch and our routers following some suggestions found here in the forums. Ever since we have been getting bombarded with:


LACP changed state to Active on port 1 (key 100) - from xxxxx-net-00 (xx.xx.xx.xx) .

And sometimes it will be port 2 (the other in the LAG group).

The switches are WS-24-400A and running firmware version 1.3.7 on both sides. They are connecting at both locations to a Mikrotik CCR1009-8G-1S running firmware 6.32.3 on them. The configuration at the switch is pretty simple: both ports enabled, key = 100, role - LACP-A, timeout = Fast, Priority = 32768.

On the Mikrotik we have created a bonding interface, MTU = 1500, mode = 802.03ad, transmit hash policy = layer 2 and layer 3, LACP rate = 1s, MII Interval = 100.

While it appears to be performing OK (we will find out more this evening) it is FLOODING my inbox.

Thoughts or suggestions? Thanks!

Re: LACP Issues

Posted: Thu Jan 14, 2016 4:44 pm
by sirhc
When you have an issue please upgrade to the latest stable version and it is always a good idea to review the release notes on any new releases including RV versions.

Please upgrade to v1.3.9rc13 and see if you still have an issue.

Release notes for v1.3.9rcX:
viewtopic.php?f=17&t=1232#p9169

Download latest firmware here:
viewtopic.php?f=17&t=240

v1.3.9rc6 - Released 12/02/2015
- Fixed Loop protection log entry refers to wrong port number
- Fixed Broadcast storm when using LACP and RSTP [Discovered by Thomas]
- Fixed Unable to change RSTP path cost for LAGs

Re: LACP Issues

Posted: Thu Jan 14, 2016 4:46 pm
by lweidig
I am NOT using RSTP on these switches and prefer NOT to use a RC firmware on production servers.

Re: LACP Issues

Posted: Thu Jan 14, 2016 4:51 pm
by sirhc
lweidig wrote:I am NOT using RSTP on these switches and prefer NOT to use a RC firmware on production servers.


There were changes to LACP to accommodate this, however v1.3.9rc13 is about to go final, I am running it at all my towers.

v1.3.7 is closed so if there is a bug in it we would not address it with a new v1.3.7 release.

v1.3.8 is also closed and would not address it in a new v1.3.8 release.

v1.3.9 is the current thread and it is about to be finalized but even if you find a bug in an older version and was not fixed already in the current version or RC version it would only be addressed in v1.3.9

All I am saying is if you find a bug in an older firmware you should first try the latest code to see if the bug is there then if it is open a support thread here.

Re: LACP Issues

Posted: Fri Jan 15, 2016 8:56 am
by lweidig
I did put this RC on over night and it does seem to have resolved the issue. Thanks!