Re: Practicing Clustering - your opinion requested

Yes, true about VLAN 1, and I even tested something along these lines in the
past and found that to be true. Tonight for me it did not work without it
... although it is late and my tired brain could have fallen a sleep already
... ;-)

Also, one of these switches is not directly linked to the master, although
it is less than 3 CDP hops away. Not sure if having a switch 2 CDP hops
away makes any difference ...

I was looking in the 3560 stuff tonight and did not think to check the 3550
guides ... I will check these tomorrow.

Many thanks Joe!

On Fri, May 29, 2009 at 1:00 AM, Joe Astorino <jastorino_at_ipexpert.com>wrote:

> I would say you are right on the money here Andrew...one of those topics
> where I would say "do it once so you have seen it and aren't shocked on lab
> day just in case". I don't think it is probable you will see it, but good
> to know it, and a lot of places still have old busted 3500 series switches
> that use this technology in their live environment (I know my last employer
> did). I mean, the current stackwise technology is pretty much taking over,
> and is much cooler : ) Anyways, for implementation when I did this my one
> time I just went straight to the 3550 config guide...there is a chapter on
> it if I recall, and shows you step by step.
>
> Interesting about VLAN 1. I thought that even if you prune it , it is
> still
> actually there for things like STP, VTP, CDP , etc.
>
>
> Regards,
>
> Joe Astorino
> CCIE #24347 (R&S)
> Sr. Support Engineer - IPexpert, Inc.
> URL: http://www.IPexpert.com
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> ALL
> From_NJ
> Sent: Friday, May 29, 2009 12:38 AM
> To: Cisco certification; David Clark
> Subject: Practicing Clustering - your opinion requested
>
> Hey Team,
>
> Not much IMO on the clustering commands and configs via the docs. This
> seems pretty easy though, but I would love to learn from you all.
>
> What I have done: Enable the cluster master via the following commands:
>
> cluster enable CCBOOTCAMP 0
> cluster member 1 mac-address 0023.0512.e380 cluster member 2 mac-address
> 001b.d4c9.1380 cluster member 3 mac-address 0022.be94.f100
>
> Can you tell whose workbooks I am currently using ... ;-)
>
> The mac address used for the members is the one from the show version
> command on each member switch. Everything seems to work, CDP is working
> it's auto-magic. I used the rcommand to access each member and the output
> of the command 'show cluster" looks good.
>
> The lab I was working tonight had earlier asked me to only forward VLANs
> through the trunk links that are needed for the remote switches. I used
> the
> command: switchport trunk allowed vlan to allow only the VLANs configured
> /
> used on the remote switches. I had to use this command since each switch
> was configured in vtp transparent mode and I could not simply enable vtp
> pruning..
>
> Hummm ... Cluster seems to only work when there is a common VLAN
> throughout,
> and it appears to require VLAN 1 (at least in my tests). Since my lab does
> not use VLAN 1 for any device access, I find myself adding this to the
> allowed vlan list just so that clustering works. All is well with this is
> in the allowed vlan list
>
> Any comments?
>
> Any other gotchas I should practice or be familiar with? As always I
> appreciate you all. Have a good night,
>
> --
> Andrew Lee Lissitz
> all.from.nj_at_gmail.com
>
>
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-- 
Andrew Lee Lissitz
all.from.nj_at_gmail.com
Blogs and organic groups at http://www.ccie.net