I've done a lot of research into this question and the best answer I've seen so far is yours...it depends. Thanks for your answer and fast reply. Chuck
On Tue, Oct 16, 2012 at 5:31 PM, Kurt Bales <[email protected]> wrote: > Hello Chuck, > > As usual the answer is "it depends". If you were only going to deal with a > known set of vendor equipment such as Cisco and Juniper then you are ok to > do either. In production I have run into issues with certain vendors such > as HP Procurve and IBM/BNT switches that only allowed you to assign defined > VLANs to instances. > > Eg BNT switches only supported 2000 vlans on a switch and only those vlans > could be assigned to instances you would end up with MST inconsistencies > leading to them wing treated as a separate region. The only work around I > found was that BNT would still assign undefined vlans to MST0. > > Also remember motto neglect MST0 priorities as it is still utilized for > inter-region calculations and for backwards compatibility. > > Hope this helps, > > Kurt / @networkjanitor > > > On Wednesday, October 17, 2012, chuck mcfadden wrote: > >> I have set up a lab to test migratation from PVST to MST. The lab will >> use >> VLAN 1-1005; private VLANs are not used. For the first test phase, all >> active VLANs will be placed in Instance 1 (no load balancing). >> >> I have read some conflicting information on best practice for configuring >> MST and I'm hoping someone can offer their opinion: >> >> One method says to configure "as few VLANs as possible" in Instance 0 and >> as many as requird in the remaining Instances. For Example: >> >> spanning-tree mode mst >> spanning-tree configuration >> name Cisco >> version 10 >> instance 1 vlan 1-4094 >> spanning-tree mst 0-1 priority 24576 >> (MST0 - no vlan; MST1 - vlan 1-4094) >> >> >> The other method says to put only the used VLANs in Instance 1-64, leaving >> the non-used VLANs in Instance 0. For Example: >> >> spanning-tree mode mst >> spanning-tree configuration >> name Cisco >> version 10 >> instance 1 vlan 1-1005 >> spanning-tree mst 0-1 priority 24576 >> (MST0 - 1006-4094; MST1 - vlan 1-1005) >> >> >> Which configuration would be "more correct"? Does anyone have a good link >> where I can get more information? >> >> Thanks, >> Chuck >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, please >> visit www.ipexpert.com >> >> Are you a CCNP or CCIE and looking for a job? Check out >> www.PlatinumPlacement.com <http://www.platinumplacement.com/> >> >> http://onlinestudylist.com/mailman/listinfo/ccie_rs >> > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
