From: ZeroFlash (Fire_Ice@verizon.net)
Date: Fri Mar 24 2006 - 16:42:16 GMT-3
Another way to accomplish this is, is to use MST. Multiple Spanning-tree
instances, if the requirement asks for it or not. It will load-balance
across the interfaces.
Instance 1 for VLANs 1 - 10
Instance 2 for Vlans 11 - 20
Sw 1
Spanning-tree mst 1 priority 0
Spanning-tree mst 2 priority 4096
Sw2
Spanning-tree mst 1 priority 4096
Spanning-tree mst 2 priority 0
On both switches:
Int f0/23
Spanning-tree mst 1 port-priority 0
Spanning-tree mst 2 port-priority 128
Int f0/24
Spanning-tree mst 1 port-priority 128
Spanning-tree mst 2 port-priority 0
Thanks
ZeroFlash
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Aaron T. Woland
Sent: Friday, March 24, 2006 2:31 PM
To: ccielab@groupstudy.com
Subject: RE: STP Load Balancing
Etherchannel is only an option is all connections are to the same switch.
-Aaron
Aaron T. Woland | Consultant | INS | Email: aaron.woland@ins.com |
Website: www.ins.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Petr
Lapukhov
Sent: Friday, March 24, 2006 10:55 AM
To: Gustavo Novais
Cc: Povarenkin, Igor; ccielab@groupstudy.com
Subject: Re: STP Load Balancing
Thanks Gustavo,
..forgot that port cost option, how silly of me :)
I also consider Etherchannel a viable load-balancing option too,
although is not directly related to STP.
One can also recall MSTP, with two instances being run
on two different topologies here.
HTH
Petr
2006/3/24, Gustavo Novais <gustavo.novais@novabase.pt>:
>
> Hello,
>
> Regarding this issue STP load balancing, you have 4 usual options:
>
>
>
> -Tuning root bridge for X vlans on a switch and to Y vlans on other
> switch.
>
> -pruning vlans off the trunk link - without redundancy
>
> -setting port vlan priority on root bridge
>
> -setting port vlan cost on non root bridge
>
>
>
> If you get Cisco LAN Switching book, you will have detailed explanations
> about
> that.
>
>
>
> HTH
>
>
>
> Gustavo Novais
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Povarenkin, Igor
> Sent: sexta-feira, 24 de Margo de 2006 12:43
> To: ccielab@groupstudy.com
> Subject: STP Load Balancing
>
>
>
> Hello Group,
>
>
>
> Though I read many docs on STP,
>
> I'm still unclear about STP Load Balancing.
>
> For example, let say I want VLAN's 1 - 10 to
>
> use trunk A and VLAN's 11 - 20 to use trunk B or odd VLAN's to
>
> use Trunk A and even VLAN's to use Trunk B between SW-A and
>
> SW-B. Can I use "switchport trunk allowed vlan" command only to
>
> accomplish this task?
>
>
>
> Thanks in advance.
>
>
>
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