Re: Catalyst 4500 Redundancy

On Aug 24, 4:15 am, Stephen <stephen_h...@xxxxxxxxxxxx> wrote:
On Sat, 23 Aug 2008 05:31:50 -0700 (PDT), PurpleServerMonkey

<PurpleServerMon...@xxxxxxxxx> wrote:
We currently have a single Cisco Catalyst 4510 with dual supervior IV
modules and dual power supplied. It's central to our network with
workgroup switches and servers connecting to it.

My question is how internally redundant is a Cisco 4510?

there are backplane traces to both Sups from each card, so you can
tolerate loss of most things as long as your network design does not
depend on a single I/O blade.

Basically investigating our options in making the core more fault
tolerant but haven't found a lot of information around what could go
wrong with a 4510. Trying to decide whether we should add another 4500
series switch to the core or upgrade to something like a 6500.

The old joke is that it is not resilient until it could survive a
nutter with a sledgehammer :) - but not many sites meet that spec...

6500 gets you more of everything - bandwidth and flexibility mainly
but you also get Netflow on some setups which might be importantm and
better inservice upgrade - but 1 box has inherent limitations.

so i would go for 2 4510s as dual star points for the network - even
if they do not have dual sups.

1 thing that does limit a 4500 is that there is "only"  6 Gbps of
bandwidth between each blade and the Sup - might be an issue depending
on your traffic patterns.

Thanks in advance for your feedback.

--
Regards

stephen_h...@xxxxxxxxxxxx - replace xyz with ntl

Thanks for the info.

We have deployed everything across multiple line cards so we have been
rather happy with the single switch however we are going through the
process of eliminating single points of failure.

Budget isn't a problem so we might look at a 6500 series device so
that we can go to 10GE modules.

.

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