We have existing 3560's with multiple trunk ports to clients+upstreams - We will go very close to hitting the 128 STP instance limit, therefore MST looks to be like an option(Without upgrading the switches).
The 3560's also have a trunk port to 7200's(For dot1q subints), for clients that require L3 connectivity.
I'm just a little unsure how to group vlans into seperate instances(Or if it is entirely necessary?)
i.e. GE0/1 (From Provider A) has:
switchport trunk allowed vlan 112,172,208,211,240,309,315,385,537,547,550-552
switchport trunk allowed vlan add 554,623,635,687,690,694,696,697,867,879,980
switchport mode trunk
These vlan's are allocated by provider and represent individual services - These vlans are then either presented on client trunk ports for L2 services, or added to trunk port to 7200 for L3 services.
So as you can see, there is no "standard" for how the individual vlan's are treated, nor which trunk port they may be presented on.....hoping someone can provide guideance on how best to manage this?
Thanks in advance.