[rbridge] TTL only - was RE: New fields in shim header?

[Joe Touch]

Silvano Gai wrote:
> Joe,
> 
> Let me focus on the need of RBridge addresses.
> 
> I didn't propose them; they are in the current WG draft:
> http://www.ietf.org/internet-drafts/draft-ietf-trill-rbridge-protocol-00
> .txt
> to achieve scalability at the ISIS level.
> 
> The outer MAC addresses are present only if the frame is sent over 802
> link (section 2.9), but it may not be present on other media; therefore
> TRILL cannot rely on them.
> 
> If you disagree with these two points, I think you disagree with the
> work that has been done in TRILL till now.

I agree with the charter, which limits us to specifying solutions that
work on 802.1 nets:

---
The TRILL WG will design a solution for shortest-path frame routing in
multi-hop IEEE 802.1-compliant Ethernet networks with arbitrary
topologies, using an existing link-state routing protocol technology.
---

The fact that the architecture discusses other links is OK; it's
informational anyway.

Joe

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