Subject: [rbridge] STP root bridge change question

From: "Jeff Pickering" <[email-masked]>
Date: Tue, 6 Oct 2009 13:22:41 -0700

Its not clear to me what a recipient is supposed to do with root bridge data in an lsp. The following
states that a BPDU listener reacts to a detected change, and other places in the specs says to insert root
bridge data into an LSP, but I cant figure out what to do with it.

4.9.3.2 Root Bridge Changes

   A change in the root bridge seen in the BPDUs received at an RBridge

   port may indicate a change in bridged LAN topology, including the

   possibility of the merger of two bridged LANs or the like, without

   any physical level indication at the port. During topology

   transients, bridges may go into pre-forwarding states that block

   TRILL-Hello frames. For these reasons, when an RBridge sees a root

   bridge change on a port for which it is appointed forwarder for one

   or more VLANs, it is inhibited (discards all native frames received

   from or which it would otherwise have sent to the link) for a period

   of time between zero and 30 seconds. This time period is configurable

   per RBridge and defaults to 30 seconds.

I suppose one could compare the recieved root list with locally known roots

and inhibit if there is a match. Is that the intent?

Thanks,

Jeff

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