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Posts: 42
Joined: Tue Jan 03, 2012 6:35 am
Location: Brisbane, Australia

Port-extender slow discovery time, high CPU?

Fri Jan 07, 2022 4:35 am

Hi all, trying out the port extender feature with a CRS354 (controller) and CRS328 (extender). Just following the basic setup at https://help.mikrotik.com/docs/display/ ... t+Extender

I was on v7.1.1 but tried also v7.2 on the CRS354.

I'm noticing that after I enable the controller bridge cascade ports on the CRS354:
  • CPU on CRS354 goes to 100% while it seems to loop through a process of discovering the ports on the CRS328. Lots of log messages about hardware offload activating.
  • hardware offload looks to be disabled on the bridge while this detection/discovery happens
  • it takes at least 10 mins to populate all the port extensions from the CRS328.
  • Only after all PE ports are discovered are the ports added to the bridge and hardware offload re-enabled and things settle down

I wanted to check if this is similar behaviour that anyone else had seen? Is it expected that the discovery process takes this long?
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