[c-nsp] downlink bgp interconnect best practices

[Gert Doering]

Hi,

On Tue, May 31, 2011 at 05:19:00PM +0400, Nikolay Shopik wrote:
> >Well, it depends a bit how the connectivity between CR1 and CR2 is
> >built.  If you have two independent switches there, the direct link is
> >not strictly needed.
> AR1 and AR2 two independent switches at different racks. If I understood 
> you correctly. So to replicate that scenario both physical links from 
> AR1 and AR2 to CR2 should fail.

Yes.  If there is no single point of failure there (like "both switches
only have a single power supply and are connected to the same UPS outlet"),
then you do not need the CR1-CR2 link.

(Interestingly enough, a few years ago I built a customer setup that did
not have this link, because I said "well, there's two switches here, with
two power supplies, two supervisors, 2x GE link bundles, this is just not 
needed" and the customer *insisted* on having the extra link there "just in 
case"...  :-) )

gert

-- 
USENET is *not* the non-clickable part of WWW!
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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