[rbak-nsp] link-group access on SE-100

[Marcin Kuczera]

On 2014-08-15 16:09, Tudor Capatina wrote:
> Hi folks,

In my opinion - access mode on SE100 makes no sense...
SmartEdge in this mode sends traffic only via signle link.
It makes sense when you have 2 linecards and link-group spans between 
linecards.
Than, in case of linecard crash traffic continues to flow.

Other modes - dot1q - will do load sharing, but you can't have 
subscriber circuits on them (pppoe, clips).

Marcin


>
> I configured an access link-group between a SE-100 and a Brocade MLX. 
> The problem i face is that traffic from the Brocade towards the 
> Redback is being split among the links but the other way around, the 
> Redback sends traffic using just one link. I have set the link-group 
> both with LACP and static but the result was the same.
> I have tried both round-robin / interface-based, created the 
> link-group both as access and access-economical,  had the link-group 
> both static and lacp - same result was reached.
> I was wondering if this is a limitation of the SE-100 unit or i am 
> missing something?
>
> Brocade config and some outputs:
> lag "se100" dynamic id 1
>  ports ethernet 1/1 to 1/2
>  primary-port 1/1
>  deploy
>  port-name "rd1-se100-lag" ethernet 1/1
>  port-name "rd1-se100-lag" ethernet 1/2
>
> #sh int e 1/1 | i rate
>   30 second input rate: 111758468 bits/sec, 19734 packets/sec, 11.49% 
> utilization
>   30 second output rate: 64714241 bits/sec, 11604 packets/sec, 6.65% 
> utilization
> #sh int e 1/2 | i rate
>   30 second input rate: 34 bits/sec, 0 packets/sec, 0.00% utilization 
> << not used
>   30 second output rate: 33963516 bits/sec, 10184 packets/sec, 3.56% 
> utilization
>
> Redback config and some outputs:
>
> link-group rd2-lag access
>  encapsulation dot1q
>  dot1q pvc on-demand 1000 through 1199 aaa
>    idle-down 600
>  maximum-links 2
>  lacp active
>  protect-group incoming-port
>
> #sh link-group rd2-lag det
>
> Link-Group: rd2-lag, ID   : 27, State : Up
> ------------------------------------------------------------------------------
> Ccct count      : 2  Grouping        : LoadShare
> Card Type       : carrier                        Type            : access
> Bindings        : Unbound  Minimum-links   : 1
> Maximum-links   : 2
> Prot-Group-Type : round-robin
> Internal Handle : 255/22:1:28/1/1/4610
> Description     :
> Constituent Circuits:
>   1. 2/15              (Up  )|  0.13%
>   2. 2/16              (Up  )|  0.00%
>
> #sh la act
>                 Port    Port          Oper     Recv        Seln
> Lg-id   Port    State   Priority      key      State         State
> ----------------------------------------------------------------------
> 27       2/15   0x3f    32767         27       exchg         active
> 27   2/16   0x3f    32767         27       exchg active
>
> Just as a note, non-access link-groups btw the Brocade MLX and the 
> Redback unit work fine.
>
> Best regards,
> Tudor Capatina
>
>
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-- 

Marcin Kuczera / Specjalista d/s telekomunikacji, Wiceprezes Zarza;du
+48 32 440 80 71/ marcin.kuczera at leon.pl <mailto:marcin.kuczera at leon.pl>

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