02-28-2007 01:49 AM - edited 03-14-2019 08:15 PM
Hi
We are currently in the process of implementing a Nortel IPT solution into a greenfield site. The switching infrastructure will all be Cisco - 4500's in the access-layer and 6500's collapsed distribution/core.
I am thinking of running layer 3 from the access-layer for fast convergence, equal cost load balancing. This is new for us as all our existing designs use layer 2 from access-layer but none of them have VOIP.
I am interested on any views on this and any pros or cons to this approach.
Many thanks
Jon
02-28-2007 02:39 AM
Jon
Are you proposing per-packet l/balancing or are you going to rely on CEF?
You will be aware an end-to-end VoIP call uses RTP/UDP and I believe there is a in-built re-ordering mechanism within this process. Therefore if packets arrive and are not hugely out of order/sequence there will not be an issue. However, if for some reason whatever that maybe - packets travel in a grossly non-symetrical fashion and arrive badly out of sequence, this it will degrade the call quality there is no doubt.
CEF LB is the way to go in a converged enterprise end user network imo.
Does this answer your qtn?
rgrds
Ajaz Nawaz
02-28-2007 03:13 AM
Ajaz
thanks for the reply. I was going to use CEF and use per destination load balancing.
Really i was more interested to try and find out what the current trend was for deploying a converged network in terms of layer 2 or layer 3 and the pros and cons of either.
Jon
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