We have an MST setup with 3 6500's, about 10 2960/2560s and +/- 20 Intel Blade switches.
They all live in the same MST region and have identical MST name, revision and instance-to-vlan mapping. Everything is converged nicely, no problem there. Now for arguments sake, suppose the instance-to-vlan mapping is as follows: instance 1 vlan 1-20, 41-4093 instance 2 vlan 21-30 instance 3 vlan 31-40 Now i want to move a vlan from instance 1 to instance 3, i.e. vlan 50. 6500#conf t Enter configuration commands, one per line. End with CNTL/Z. 6500(config)#spanning-tree mst configuration 6500(config-mst)#instance 3 vlan 50 now my instance mapping looks like: instance 1 vlan 1-20, 41-49, 51-4093 instance 2 vlan 21-30 instance 3 vlan 31-40, 50 the problem is, because the instance-hash is not the same among all switches, they regards eachother as different regions, effectively converging in a way i don't want. What is the best practice for changeing vlan-to-instance mappings? Should I perform an semi-atomic change among all switches, accepting a little downtime? Or can this be resolved by configuring MST0 (the infrastructure MST) to converge in a similar way as MST 1 for instance? thx! _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
