[rbridge] encoding of TRILL IS-IS frames

[Silvano Gai]

I agree that "as long as we have a combination of (MAC DA +
protocol type) that is unique for TRILL's IS-IS, we
should be OK."

Since it is hard to get multiple Ethertype, I propose a single Ethertype
and multiple MAC-DAs.

I cannot emphasize more how important it is to have simple
classification criteria that are HW friendly.

-- Silvano

-----Original Message-----
From: rbridge-bounces at postel.org [mailto:rbridge-bounces at postel.org] On
Behalf Of Anoop Ghanwani
Sent: Monday, October 13, 2008 11:27 AM
To: Dinesh G Dutt; Donald Eastlake
Cc: Developing a hybrid router/bridge.; Radia Perlman
Subject: Re: [rbridge] encoding of TRILL IS-IS frames


> -----Original Message-----
> From: rbridge-bounces at postel.org 
> [mailto:rbridge-bounces at postel.org] On Behalf Of Dinesh G Dutt
> Sent: Saturday, October 11, 2008 4:37 AM
> To: Donald Eastlake
> Cc: Developing a hybrid router/bridge.; Radia Perlman
> Subject: Re: [rbridge] encoding of TRILL IS-IS frames
> 
...
> IEEE has set the standard of 
> identifying control 
> frames using the MAC DA and that's what we're suggesting. 
...

Just a point of clarification...IEEE used to use the
DA to identify the protocol but they are starting to
move away from that model.  Once AB-REV is published,
we will set xSTP and LLDP frames using the same MAC
address; what will be used to distinguish them, then,
is the protocol type.

I think as long as we have a combination of (MAC DA +
protocol type) that is unique for TRILL's IS-IS, we
should be OK.

Anoop

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