[rbridge] Pseudo-node nickname
nordmark at acm.org
Mon Jul 25 12:01:16 PDT 2011
A few questions that I didn't bring up in the meeting since we were
short on time.
You said that the pseudo-node nickname is not used for multicast.
Is that a statement about the destination nickname (which identifies the
tree)? Or is it also a statement about the source nickname?
I would assume the source nickname would be a pseudo-node even for
multidestination frames, since the egress rbridges would learn from the
Currently TRILL can handle a link being partitioned as long as there is
at least one RBridge in each partition; a DRB will be elected for each
With pseudo-node nicknames this adds some complexity. I think each DRB
will need to pick a unique pseudo-node nickname after they detect a
partition of the link (but how do they reliably detect the difference
between a RB failure and a partitioned link?). If they don't packets
will be routed to an egress RBridge which thinks it is attached to the
same link as the endnode, even though it isn't due to the endnode being
in the other half of the partitioned link. Hence packets will be dropped
on the floor.
Perhaps you can clarify those parts.
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