From: keith tokash (ktokash@hotmail.com)
Date: Mon Feb 04 2008 - 16:31:34 ARST
I don't really follow your ASCII diagram, but when allocating your
port-channel ports you need to decide if you want a port-channel to completely
fail or stay up and be degraded if a port goes down. If you have a pair of
6509s with 1 x 6748 each, you might have a 2g port-channel redundantly
uplinking your edge device. If that's the case you can put the ports next to
each other (po1 = gi1/1-2 on 6509a, po2 = gi1/1-2 on 6509b), and set up LACP
on the primary to fail the entire po if a link dies (don't set on backup, you
don't want to have both sides fail when you can have 1g on backup).
If you're using a single po for redundancy, disregard previous paragraph. :)
Going on the Sups will work fine, although I prefer to keep them clear for
things we didn't see coming, like an emergency need for a sniffer or
something. I think of Sup ports as "hidden" in that I don't bring them up,
and keep them in my back pocket, but depending upon how much money grows on
your tree that may not be an option.
With a few exceptions, secrecy is deeply incompatible with democracy and with
science.
--Carl Sagan
> Date: Sun, 3 Feb 2008 21:14:04 -0800
> From: mag08036@yahoo.com
> Subject: sup720 vs line card etherchannel
> To: ccielab@groupstudy.com
>
> Hello,
>
> Does anyone know what the pros and cons are for each of the following
setups. Say both devices are in the distribution layer(6500 switches). I am
not finding any best practices on this. Which is the recommended setup
etherchannel between the line cards or between the sup720s and why. If you can
guide me to some links which offer advise or any recommendations on real life
experience would be greatly apprciated.
>
> Example:
>
> etherchannel (all 4 links in one bundel)
>
> sup720 Active --------------------- sup720 Active
> ---------------------
> sup720 Standby --------------------- sup720 Standby
> ---------------------
>
>
> etherchannel (all 4 links in one bundle)
>
> Line Card 1 ----------------------- Line Card 1
> -----------------------
> Line Card 2 ----------------------- Line card 2
> -----------------------
>
>
>
>
>
>
> ---------------------------------
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