Thursday, October 18, 2018

Spanning tree re-convergence on LACP links

Hi,

I am currently in the process of bringing up a backup link that broke before but is now fixed.

We currently have two LACP trunks, see below example

Primary Link

Core 1 Core 2

C10 ------------>C10 TRUNK 15

D10 ------------> D10

Backup Link

Core 1 Core 2

E10 ------------>E10 TRUNK 25

F10 ------------>F10

Now the primary link is obviusly the active link right now, and what I want to know is, if I now input the command to bring up the LACP trunks, will this force a re-convergence of both trunks/bring down the current primary while it does so?

Thanks

EDIT: The spanning tree priority for both trunks that run over this is 4

Core 1

spanning-tree trk15 priority 4

spanning-tree trk25 priority 4

spanning-tree priority 0

Core 2

spanning-tree trk15 priority 4

spanning-tree trk25 priority 4

spanning-tree priority 14



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