Re: L3 Port Channel Question.

From: Marko Milivojevic <markom_at_ipexpert.com>
Date: Mon, 4 Jan 2010 18:59:52 +0100

On Mon, Jan 4, 2010 at 18:43, Radioactive Frog <pbhatkoti_at_gmail.com> wrote:
> Good question!
>
> AFAIK the tie breaker for chosing OSPF over a L3 port channeling would be
> "OSPF provides MULTIPLE path load balancing".
> Also checks multiple other network related parameters (latency bandwidth
> etc). With L3 port channeling we can't enforce based on bandwidth/load,
> etc).

Sorry but you are not correct here. OSPF does not take anything other
than cost to the destination as the basis for load sharing. If more
than one link shares the the same cost to the destination, it will be
load shared. Where packet is sent to depends on the hash the CEF uses.
I'm sort of tip toeing around defining the hash, because I'm not 100%
sure what it consists of by default...

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Received on Mon Jan 04 2010 - 18:59:52 ART

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