From: boby2kusa@hotmail.com
Date: Fri Jul 11 2003 - 16:22:29 GMT-3
----- Original Message -----
From: "Emad " <emad@zakq8.com>
To: <ccielab@groupstudy.com>
Sent: Friday, July 11, 2003 11:49 AM
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?
Do you mean load balance the traffic thoughput between the 2 gig uplinks or
load balance the switches load?
Load balancing between the 2 gig link can be accomplished by channeling the
uplinks. Load balancing the the switch's load (for a lack of a better term)
can be accomplished by having the one or the other as the bridge to the root
(which should be the 6509). For example, 2 vlans, vlan 1 will be forwarding
on 4506 A while blocking the vlan 2 and vice versa for the other switch.
This would be manipulating either the RP cost or the RP priority, somebody
will correct me if this is the wrong way to manipulate which switch should
the vlan take on it's way to the root.
> - By enabling routing protocol between the access layer and the core
> layer , but how?
This would be load balancing on layer 3 and you would load balance according
to the destination of the traffic, routers look at the routing table to
forward the packet.
>
> 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
>
>
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