[c-nsp] IP LFA in ring topology

[Adam Vitkovsky]

I guess what I really need is RPR but I'm not sure whether it can be run
over Ethernet links

adam
-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Saku Ytti
Sent: Thursday, November 29, 2012 11:48 AM
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] IP LFA in ring topology

On (2012-11-29 10:16 +0100), Adam Vitkovsky wrote:

> Not that I would want to mess with it but..
> Would it be possible with use of multi-topology isis  -create one 
> topology/point of view per node in ring?

I suppose so yes :). But how would you decide which topology packets go?
IIRC today in Cisco you need to use DSCP to decide topology, so you'd give
each ring node their own DSCP value and you'd lose ability to offer
customers any QoS?
So perverse I really want to see someone do it.

There is lot of push right now in standard bodies to make repairs faster and
cover more scenarios. LFA IP-FRR is not end-goal, it's just interim
check-point.


--
  ++ytti
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