Re: WGLC for BFD over Link Aggregate Group Interfaces - ends November 8

[Marc Binderberger <[e-mail]>]

Hello Ashesh,

> the receiving end will have a Rx session for every member of the LAG?

Yes. You have a sending and a receiving session per LAG member link.

> If so, how will the session negotiation work with more than one 
> endpoint on the peer node?

section 2.2 explains it. Here the part for starting the session:

   The demultiplexing of a received BFD packet is solely based on the
   Your Discriminator field, if this field is nonzero.  For the initial
   Down BFD packets of a BFD session this value MAY be zero.  In this
   case demultiplexing MUST be based on some combination of other fields
   which MUST include the interface information of the member link.


In other words your implementation "binds" a particular Rx/Tx session 
to one member interface (I use quotation marks to indicate the details 
are up to your implementation).


Regards, Marc



On Fri, 1 Nov 2013 11:58:54 -0700, Ashesh Mishra wrote:
> Hi all,
> 
> Does the mechanism proposed in this draft suggest that the 
> transmitting end will multicast the BFD CC frames over the LAG and 
> the receiving end will have a Rx session for every member of the LAG?
> 
> If so, how will the session negotiation work with more than one 
> endpoint on the peer node?
> 
> --
> Ashesh