I'm testing in a lab environnement a Cat 4006 with supp eng III with 2 switch 3550 and one 2900 xl connect to it .. I've configured the stp load balancing between the Giga port and a Fa port .. as follow
spanning tree Vlan 1 port-priority 100 ( Giga)
Spanning tree vlan 1 cost 4 (Giga)
Spanning tree clan 1 port-priority 125 (FA)
spanning tree vlan 1 cost 10 ( fa )
So like that I've got a failover ..
My question is when I do a Sh spanning-tree int ... on the 3550 switch I can see the port FA as BLOKED but on the 2900 XL switch both port are forwarding .. '?? So I do not know if the failover can work ..
1) you can't do STP load balancing in one VLAN. STP load balancing is always meant as load balancing between trunks. Example: VLAN1 traffic sent on int fa 0/1 while VLAN2 traffic sent on fa 0/2. The only one port per switch is a root port for each VLAN.
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