[c-nsp] ASR920 LACP and xconnect

cnsp at marenda.net cnsp at marenda.net
Fri Aug 21 13:49:31 EDT 2020


Sorry, i think the behaviour is explainable. 
You have (I think, on both sides equivalent config) 
Two Gig Ports bundled with LACP to that prot-channel. 
For that, the switch speak link-local pakets to the neighbor device. 
Now , yo build that xconnect and ask to forward link-local pakets to the
remote. 
OK, device  does this. 
Recieving device does some fancy load blancing an therfor, LACP starts to
fail since . 
Either let the local switch handle the LACP Bundle and do not forward the
LACP packets 
Thru that xconnect, 
or build _two_ transparent xconnects/Eline/Epipe servicesso A-1 sees B-Side
1 and A-2 sees B-2 
and the LACP Pakets from A1 and A2 do not go all to B1 or mixed/loadbalaced
to B1 and B2 (end vice-versa). 
and _do_not_ bundle locally. 
Just my 0.01 $ 
Mit freundlichen Grüßen 
Kind regards 
Veuillez agréer mes salutations distinguées 
Met vriendelijke groet 
Jürgen Marenda. 
> -----Ursprüngliche Nachricht----- 
> Von: cisco-nsp <cisco-nsp-bounces at puck.nether.net
<mailto:cisco-nsp-bounces at puck.nether.net> > Im Auftrag von James 
> Bensley 
> Gesendet: Freitag, 21. August 2020 16:38 
> An: Eric Van Tol <eric at atlantech.net <mailto:eric at atlantech.net> >;
cisco-nsp at puck.nether.net <mailto:cisco-nsp at puck.nether.net>  
> Betreff: Re: [c-nsp] ASR920 LACP and xconnect 
> 
> On Thu, 20 Aug 2020 at 19:16, Eric Van Tol <eric at atlantech.net
<mailto:eric at atlantech.net> > wrote: 
> > Interface configs: 
> > 
> > interface GigabitEthernet0/0/0 
> > mtu 1600 
> > no ip address 
> > load-interval 30 
> > negotiation auto 
> > channel-group 1 mode active 
> > ! 
> > 
> > interface GigabitEthernet0/0/1 
> > mtu 1600 
> > no ip address 
> > load-interval 30 
> > negotiation auto 
> > channel-group 1 mode active 
> > ! 
> > interface Port-channel1 
> > mtu 1600 
> > no ip address 
> > load-interval 30 
> > negotiation auto 
> > no keepalive 
> > service instance 1 ethernet 
> >   encapsulation default 
> >   l2protocol peer lacp 
> >   xconnect x.x.x.x 1234 encapsulation mpls pw-class Raw-Mode-VC5 
> >    mtu 1600 
> 
> What happens if you change each interface to be "channel-group 1 mode on" 
> and remove "l2protocol peer lacp" to disable LACP and remove it from the 
> equation? 
> 
> Cheers, 
> James. 
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