[rbridge] Separating DRB election from encapsulator/decapsulator
Donald.Eastlake at motorola.com (Eastlake III Donald-LDE008) Sat, 03 November 2007 04:02 UTC
From: "Donald.Eastlake at motorola.com"
Date: Sat, 03 Nov 2007 00:02:38 -0400
Subject: [rbridge] Separating DRB election from encapsulator/decapsulator
In-Reply-To: <47294F89.4050905@sun.com>
References: <47294F89.4050905@sun.com>
Message-ID: <3870C46029D1F945B1472F170D2D97900336DBD2@de01exm64.ds.mot.com>
That seems like a good idea and should simplify the Hellos. Donald -----Original Message----- From: rbridge-bounces at postel.org [mailto:rbridge-bounces at postel.org] On Behalf Of Radia Perlman Sent: Thursday, November 01, 2007 12:01 AM To: Developing a hybrid router/bridge. Subject: [rbridge] Separating DRB election from encapsulator/decapsulator When trying to carefully write up all the rules with respect to RBridges and VLANs, it occurs to me that one place in which things can be simplified is to separate the function of the DRB on a layer 2 cloud from the selection of data packet encapsulator/decapsulator for each VLAN. What I mean is that instead of having n different DRB elections with different priorities for different, possibly overlapping sets of VLANs for that cloud, we instead have a single DRB election for that cloud, and as a result, a single pseudonode associated with the cloud that would be visible to any RBridges not on the cloud. The DRB on a cloud has the following duties: a) names the pseudonode associated with the cloud b) reports an LSP on behalf of the pseudonode c) issues IS-IS CSNPs (a way of acknowledging LSPs that have been sent on the cloud) d) specifies, for each VLAN supported on that cloud, which RBridge on the cloud will be doing encapsulation/decapsulation for that VLAN e) chooses a VLAN tag with which all RBridge-RBridge communication on that cloud will be tagged in the outer header (explanation of this will be in a future email). For now, does anyone see any problem with this? It's unfortunately a bit entwined with the other hairy discussion going on, but I think that we're going to converge for that. Radia _______________________________________________ rbridge mailing list rbridge at postel.org http://mailman.postel.org/mailman/listinfo/rbridge
- [rbridge] Separating DRB election from encapsulat… Radia Perlman
- [rbridge] Separating DRB election from encapsulat… Eastlake III Donald-LDE008