[c-nsp] VoIP classifying and queuing in an access switch <--> core Layer 2 network

Alex Balashov abalashov at evaristesys.com
Fri Sep 5 03:26:41 EDT 2008


Oliver Boehmer (oboehmer) wrote:

> Alex Balashov <> wrote on Friday, September 05, 2008 8:28 AM:
> 
>> If the switch is purely Layer 2, it would be difficult to classify
>> VoIP traffic ipso facto, as the factors that differentiate it from
>> other kinds of traffic are, by definition, >= Layer 3.
> 
> Well, even a Layer 2 switch can classify based on L3 information, most
> of today's (and yesterday's) Cat2xxx/3xxx support this. 
> I would recommend looking at the Enterprise QoS solution reference at
> www.cisco.com/go/srnd for plenty of examples for various access switch
> platforms.

Really... I wasn't aware Layer 2 devices had DiffServ/DSCP awareness.

I stand corrected, then!



-- 
Alex Balashov
Evariste Systems
Web    : http://www.evaristesys.com/
Tel    : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
Mobile : (+1) (706) 338-8599


More information about the cisco-nsp mailing list