From: Charles Church (cchurch@wamnet.com)
Date: Mon Jun 02 2003 - 22:02:54 GMT-3
How about this. Configure 2 vlans on each of the 4507s, with trunks to each
6500. Bridge these VLANs on the 2 6500s into 1 flat network. Balance the
VLANs on the trunks so each VLAN uses the opposite trunk, so that both are
used. I don't have a lab here to try it so I'm not sure if there'll be any
spanning tree issues between the two 6500, but I think it's worth a shot to
try, at least in theory.
Chuck Church
CCIE #8776, MCNE, MCSE
Wam!Net Government Services
13665 Dulles Technology Dr. Ste 250
Herndon, VA 20171
Office: 703-480-2569
Cell: 585-233-2706
cchurch@wamnet.com
PGP key: http://pgp.mit.edu:11371/pks/lookup?search=chuck+church&op=index
>From: Colin Barber [mailto:Colin.Barber@telewest.co.uk]
>Sent: Sunday, June 01, 2003 9:56 PM
>To: Emad; CCIE LAB (E-mail)
>Subject: RE: switching block design
>
>As you have layer 3 capabilities with the 4507 at the edge I would use
this,
>making all your links routed and use OSPF.
>
>If you use HSRP on the core switches you will need to make half your
clients
>on each one of the edge switches use one HSRP default gateway and the other
>half another one to achieve load balancing. There is more work for your
core
>switches here, running HSRP and running spanning tree with the edge
switches
>across the layer 2 link. Also you have the chance of a layer 2 problem at
>the edge (broadcast storm for example) affecting the core.
>
>Colin
>
>-----Original Message-----
>From: Emad [mailto:emad@zakq8.com]
>Sent: 01 June 2003 18:36
>To: CCIE LAB (E-mail)
>Subject: switching block design
>
>Folks,
>I jus want to share a design with you,
>I have two core switches 6513 connected together through two giga ports and
>I have two switches 4507 (each one of them is connected by one link to both
>switches 6513) and each switch 4507 has one vlan only configured on it , if
>I want to have load balancing on the switch 4507 to the two switches 6513 ,
>what is more suitable , running ospf between these two uplinks or having
>HSRP running on the two interfaces and how can I do it?
>Please advise
>
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