> Hi Group,
>
> How does having 1 STP per VLAN create load-balancing and path-redundancy??
> What would happen if you have 1 STP for all distributed vlan's?
>
> Thanks.
>
> Dave.
>
Having 1 Spanning Tree Port per VLAN allows you to configure switches at the
Access Layer which have multiple VLANS and two trunk ports going back to the
Distribution Layer. Should one of the connections to the core fail the
second link will take over for all VLAN's. While both connections are active
half the VLANs use one pipe and the other half the other pipe.
In concept
Distribution: 2 - 6509's with 16 port Gigabit Modules.
Access: 16 - 2948G's each linked back to the Distribution 6509's
All odd VLANs have a lower priority on 6509 #1
All even VLANs have a lower priority on 6509 #2
Should 6509 #1 fail, then the links to 6509 #2 take over for all VLANs.
If all VLAN's use the link to 6509 #1, then you have a Gigabit of access
total. But by spreading the VLAN's across both ports you get to use 2
Gigabits of access.
David C Prall, CCDP CCNP MCSE MCNE
[EMAIL PROTECTED]
http://dcp.dcptech.com
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