> Hi all,
> 
> I've deployed a 2 x 1GE LAG between a CER ('cor2' - running 5.4c) and MLX
> ('cor3' - running 5.4b), using identical config.  When I bring up the lag,
> the secondary port goes into LACP-BLOCKED state and I end up with no LAG.  I
> feel like I must be missing something here - this works for me between 2
> MLX's, but there seems to be a subtle difference between the MLX and CER on
> this issue.
> 
> Any help would be appreciated!
> 
> Many thanks,
> 
> Tony
> 

Hi Tony,

I've done a number of MLX to CER LAG's using 10G ports or 1G ports without any 
trouble.  No unusual config was required (I'm on 5.2). The only visible 
difference between our configurations is the use of "lacp-timeout short".

I assume those ports come up correctly when not part of the LAG? I would also 
check the interface settings match exactly. I've had problems with UDLD in 
particular, which shouldn't be used on LACP ports but is sometimes forgotten.

Cheers.
Mitchell


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