[c-nsp] ACE and "mac-sticky enable"

[Oliver Boehmer (oboehmer)]

Jean Gervers <> wrote on Friday, May 25, 2007 12:02 PM:

> Hi @all!
> 
> I hope some Application Control Engine Module Experts
> are also on this list.

Not really an expert, but I'll try my best:

> mac-sticky enable
>
> Can anybody explain me, how this command works in detail if it's
> enabled on a VLAN Interface?!

This command is used by ACE to provide symmetrical flows. If there are
multiple routes (interfaces) from ACE back to the client, then when
using the mac-sticky enable feature the ACE will return the traffic on
the same interface that it was received using information already
populated in mac-sticky table.  I believe this feature is also used for
provding a type of persistence when load balancing transparent
caches/proxies. I've seen it being used for firewall load-balancing as
well where symmetrie is essential.

	oli