[rbridge] How many "priorities" are there?

[Ayan Banerjee (ayabaner)]

Radia, 

I believe that a (IIH-Priority in base IS-IS), c (Root priority TLV in
draft-ward-l2isis), and d (Section 3.7.3 of
draft-ietf-trill-rbridge-protocol, Device ID TLV of draft-ward-l2isis)
are already defined. I would think that the customer may want to
configure all of them separately. 

Thanks,
Ayan 

-----Original Message-----
From: rbridge-bounces at postel.org [mailto:rbridge-bounces at postel.org] On
Behalf Of Radia Perlman
Sent: Friday, April 25, 2008 9:53 AM
To: Developing a hybrid router/bridge.
Subject: [rbridge] How many "priorities" are there?

Is there just a single priority for an RBridge, that is used for all the
priorities, or are there separate ones for:
a) priority for becoming DRB on a layer 2 cloud
b) priority for becoming the "CSNP-generator" for announcing VLAN x
endnodes? And if so, is there a separate priority per VLAN, so you can
have low priority for one, and high for another?
c) priority for becoming a tree root?
d) priority for owning a chosen (as opposed to configured) nickname?

There might even be more cases where we use the term "priority".

I'd guess that a) and c) might be things that customers would want to
configure. I think that b) is something that should be just a flag "I
implement endnode advertisements (learning from and advertising)",
though perhaps the flag should be per VLAN. I don't think d) matters,
and we could just use the same priority as for DRB.

Radia
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