LACP Frames / Level3 Transport

Eygene Ryabinkin rea+nanog at
Tue May 24 09:48:28 UTC 2016

Nevin, good day.

Sun, May 22, 2016 at 07:55:31PM +0000, Nevin Gonsalves via NANOG wrote:
> Hoping someone may have come across a similar issue. Has anyone ever
> seen a situation where maybe like a Level3 transport system could be
> possibly dropping LACP frames..?
> End point A -  tx and rx counts incrementing for LACP
>  LACP info:        Role     System             System      Port    Port  Port                              priority          identifier  priority  number   key       et-0/0/0.0     Actor        127  5c:45:27:6d:2a:c0       127      56    16      et-0/0/0.0   Partner          1  00:00:00:00:00:00       127      56    16    LACP Statistics:       LACP Rx     LACP Tx   Unknown Rx   Illegal Rx      et-0/0/0.0              6925              6922            0            0
> End Point B - no RX, partner macs are 0s..
>   LACP info:        Role     System             System      Port    Port  Port                              priority          identifier  priority  number   key       et-9/1/0.0     Actor        127  5c:45:27:77:d6:c4       127      68    16      et-9/1/0.0   Partner          1  00:00:00:00:00:00         1      68    16    LACP Statistics:       LACP Rx     LACP Tx   Unknown Rx   Illegal Rx       et-9/1/0.0                 0        6752            0            0 
> Link works fine otherwise outside the aggregate and w/o LACP. Any
> inputs will be greatly appreciated.

Cisco Q-in-Q implementation in some configurations (details are
blurry, since our provider turned to X-connect quite fast).  Also
VPLS implementation in (older) EXOS releases (Extreme Networks),
Eygene Ryabinkin, National Research Centre "Kurchatov Institute"

Always code as if the guy who ends up maintaining your code will be
a violent psychopath who knows where you live.

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