RE: Practicing Clustering - your opinion requested

Well I suppose the 3560 guides should have very similar things, that was
just my personal experience ( I have 4x 3550 in my home lab). Glad to help
dude!
 

Regards,

Joe Astorino
CCIE #24347 (R&S)
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com <http://www.ipexpert.com/>
  

  _____

From: ALL From_NJ [mailto:all.from.nj_at_gmail.com]
Sent: Friday, May 29, 2009 1:08 AM
To: Joe Astorino
Cc: Cisco certification; David Clark
Subject: 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
Blogs and organic groups at http://www.ccie.net