I sometimes use LACP as well as a "poor man's BFD"; in the case of "the lights 
are on, but nobody's home" syndrome.

aka a situation where the physical link(s) may be up, but the control plane 
functions are dead at the far end. Without LACP control packets, you may 
inadvertently start trying to send traffic down a link where the other end 
isn't actually functional yet. That's a definite case, albeit for a single-link 
LACP. 

If you can turn it on, and both sides support it, then I suggest using it; I 
haven't seen any harm IMHO.

- CK.


On 18/10/2013, at 8:00 AM, Keith <[email protected]> wrote:

> Both sides came up on the MX and it looks ok. Am I going to get bitten in the 
> ass
> at some point for not running LACP?


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