How to announce ethernet capabilities in GMPLS
Freek Dijkstra <fdijkstr@science.uva.nl> Wed, 03 May 2006 15:53 UTC
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Date: Wed, 03 May 2006 17:46:05 +0200
From: Freek Dijkstra <fdijkstr@science.uva.nl>
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Subject: How to announce ethernet capabilities in GMPLS
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Hi, I have a question about GMPLS. My interest is mostly scientific in nature; and after reading a few RFC's and internet drafts, I still found no satisfying answer. I may have overlooked it. How would you specify the encoding type for a link with IEEE 802.1q VLAN tags versus a link which can not do that? And related, how to distinguish between WAN PHY and LAN PHY encoding? Imagine a small network with 3 or 4 layer 2 switches, with all interfaces connected to one central photonic cross connect (MEMS device). In such a case, it is useful to know the above details. If I'm correct, a Layer 2 switch announces the capabilities of each interface using a link state advertisement (LSA). A LSA seems to contain at least - "LSP encoding type" and - "switching type". In all cases, the parameters seem to be "Ethernet" and "L2SC" respectively. At least draft-papadimitriou-enhanced-lsps-04 explictly says that WAN PHY and LAN PHY both fall in the Ethernet "LSP Encoding Type". draft-dimitri-gels-framework-00 seems to suggest that perhaps new encoding types must be invented. I take it that I misunderstood, and this will be defined in the "Switching Capability-Specific Information" part of the LSA. I tried looking, and Adrian's excellent Internet and it's protocols lists that the "Switching Capability-Specific Information" for L2SC only lists "minimum bandwidth" and "MTU". Am I correct that the GELS working group will look into extensions for this purpose? I'm currently not interested (yet) in the specific details, but mostly in the general idea here. Is there by any chance a list of already defined "Switching Capability-Specific Information" parameters for other layers? Perhaps a list of internet drafts to go through. I might be wrong here somewhere -- somehow WAN/LAN PHY and IEEE 802.1q VLAN or not capable seem other type of parameters to me then "MTU" (which is currently defined for L2SC). If so -- what am I missing? Regards, Freek
- How to announce ethernet capabilities in GMPLS Freek Dijkstra
- RE: How to announce ethernet capabilities in GMPLS E.T.Metz
- Re: How to announce ethernet capabilities in GMPLS Freek Dijkstra
- Re: How to announce ethernet capabilities in GMPLS Dimitri.Papadimitriou
- RE: How to announce ethernet capabilities in GMPLS E.T.Metz