[c-nsp] MST Experiences: was Re: Dell switches (specifically PowerConnect 7048P) and Ciscos

[Chuck Church]

Those were our same exact reasons as well.  We were supporting multiple
tenants and had a need for a large number of VLANs on the campus.  The 3560s
also had that 128 STP instance limit, and we were fast approaching it.  We
knocked it down to about 10 MST instances, giving us some flexibility as far
as setting roots and costs. 

Chuck

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Kis-Hegedus Gábor
Sent: Wednesday, November 28, 2012 5:13 AM
To: Gert Doering; Saku Ytti
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] MST Experiences: was Re: Dell switches (specifically
PowerConnect 7048P) and Ciscos

Hi,

We use MSTP with VTPv3. It's quite good if your topology is simple but you
have a lot of VLANs. Before we used a lot of STP instances, now we use two
of them:)

Also on the Cisco 2960 series platform you have an STP instance limit of
128.

Br,
Gabor

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Gert Doering
Sent: Wednesday, November 28, 2012 10:46 AM
To: Saku Ytti
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] MST Experiences: was Re: Dell switches (specifically
PowerConnect 7048P) and Ciscos

Hi,

On Wed, Nov 28, 2012 at 11:13:02AM +0200, Saku Ytti wrote:
> But for completely other (numerous) reasons, we're ditching whole L2 
> and rocking MPLS end to end.

Yeah.  We see to it that our L2 STP domains are very small (if we can avoid
it, no more than 4-6 devices each), and we need to go cross-city, it's
EoMPLS instead of "STP + L2 all across the core".

But our business is very much different from yours - less customers, and
much more customized setups for each customer.  We *do* have VLAN assignment
conventions, and all that, of course :-) - but at least once a month we need
to do something that's an exception for some reason - and then I'm quite
happy not having to fiddle with MST vlan mapping.

gert

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

_______________________________________________
cisco-nsp mailing list  cisco-nsp at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/