From: Larry Letterman (lletterm@cisco.com)
Date: Fri Jul 11 2003 - 16:50:50 GMT-3
I am not aware of any load balance ability in normal STP, since its
Function is to block redundant paths to keep loops from happening..
If your concerned about bandwidth, then port channel(etherchannel) the
active
Active link to the core...
If you ran L3 links from the router to the access switch, routing would
load balance
Coming down but not up to the router, since the hsrp active link would
take all traffic
From the host to the router, by default gateway function....
Larry Letterman
Cisco Systems
-----Original Message-----
From: Emad [mailto:emad@zakq8.com]
Sent: Friday, July 11, 2003 12:18 PM
To: 'Larry Letterman'; ccielab@groupstudy.com
Subject: RE: Switching: OT network design
Importance: High
The uplinks will carry vlans of course , the design is like this:
Three access layer switches , each one has 2 vlans configured and all
the three switches are connected through one uplink to one core and the
another link to the another core switch ,
Of course the core switches will have all the vlans configured on all
the access layer switches but I need to load balance between the two
uplinks connecting between each access layer switch and the core switch,
How can I do it , if I used the routing , shall I turn the port-channel
of the uplinks to be L3 ports or what?
Plz advice
thanx
-----Original Message-----
From: Larry Letterman [mailto:lletterm@cisco.com]
Sent: Friday, July 11, 2003 10:09 PM
To: 'Emad '; ccielab@groupstudy.com
Subject: RE: Switching: OT network design
If the network were L3 to the switches and no vlans, the routing
Protocol could load balance coming down to the switches...
The only way I know to do it, is to make one core the root switch for
one
Vlan and the other core the root for the other..thats not a good design,
but if
You really want to load balance from the core it might work...
Larry Letterman
Cisco Systems
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Emad
Sent: Friday, July 11, 2003 11:50 AM
To: ccielab@groupstudy.com
Subject: Switching: OT network design
Folks,
I just wanna share an idea with you all ,
I have 4506 switch in a network acting as the access layer and connected
to two 6513 core switches with 2G uplink per each one,
Each 4506 switch has 2 vlans and I want to have both uplinks to the core
switches working in load balance , how can we guarantee that:
- By STP layer2 load balance? If yes , plz tell me how?
- By enabling routing protocol between the access layer and the core
layer , but how?
I read the good paper of CISCO AVVID network infrastructure but I didn't
get it because most of scenarios are depending on one vlan and
redundancy between the two uplinks not load balancing and 2 vlans,
Plz advice
Thanx
This archive was generated by hypermail 2.1.4 : Wed Aug 06 2003 - 06:52:36 GMT-3