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RE: Layer 2 Switching Caps LSPs
At 01:09 AM 1/29/2005 +0100, Dimitri.Papadimitriou@alcatel.be
indeed the L2LSP approach does not target the
two below listed category of equipment (i.e. .1q bridges and IP/MPLS
LSRs) - so what is the exact question/issue from this perspective ?
So the question I'd like to ask is what type of end-user applications you
have in mind that would require the VLANs to be stitched together this
now the point is not only in reducing the
overhead - but on the underlying operations when those are not required
In this case, I'd like to know the details of how maintainability (OAM)
and reliability (redundancy) aspects of the operations are addressed
- on the other side it could be interesting
that you extend a bit on the scalability of EoMPLS - to which scaling
dimensions are you referring here ?
To number of connections which is independent from number of VLANs. BTW,
when talking about VLAN stitching, you are only limited to 4K VLANs per
interface (4K connections) even if that interface is 10GE, so why do you
want to impose such limitations in the aggregation (and/or core)
ps: concerning the last point i suggest a
further reading of RFC 3945 (this could also help sorting the question on
how GMPLS applies to packet LSPs)
Ali Sajassi <firstname.lastname@example.org>
01/28/2005 15:49 PST
PAPADIMITRIOU/BE/ALCATEL@ALCATEL, Shahram Davari
cc: Shahram Davari
PAPADIMITRIOU/BE/ALCATEL@ALCATEL, David Allan
<email@example.com>, "'Adrian Farrel'"
Subject: RE: Layer 2 Switching Caps
There are two categories of Ethernet switches out
1) pure L2 switches - existing IEEE (.1q)
2) L2/L3 switches - capable of both bridging and MPLS/IP
switching (including support for EoMPLS)
Considering the current L2/L3 switches can support PtP
Ethernet services end-to-end in a scalable way using EoMPLS, then the
question is why do we need yet another alternate mechanism to provide the
same end service without any obvious benefit. Is saving a few byte in the
header the primary objective in here ?
It should be noted that the proposed use of GMPLS control
plane is not compatible with either of the above two category of switches
and thus cannot be leveraged by them.