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Ruklaw
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Joined: Sat Jan 08, 2022 5:56 pm

RSTP costs not being properly calculated with LAG

Sat Jan 08, 2022 6:15 pm

Hi,

I'm using a CRS309-1G-8S+ and a CRS326-24S+2Q+ in my environment alongside a fair amount of Cisco switches.

On the Mikrotik and Cisco switches the port cost calculation mode is set to long.

On the Cisco switches, I can see the cost of a 10gb link is showing as 2000, a teamed 2x10gb link is 1000, and a team of 3x10gb is 660.

While SwOS doesn't give the detailed info that I can easily get on the cisco switches, I can derive from the 'root path cost' values on the RSTP page that it is giving the same cost of 2000 to a teamed link of 2x10gb ports as to a single 10gb port.

This is apparent on both of the switches.

Any chance this can be fixed?
 
Ruklaw
just joined
Topic Author
Posts: 2
Joined: Sat Jan 08, 2022 5:56 pm

Re: RSTP costs not being properly calculated with LAG

Sat Jan 08, 2022 6:17 pm

Sorry, meant to add both switches are running the latest version of SwOS, 2.13

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