[c-nsp] Maximum spannig tree instances

[Geoffrey Pendery]

> Will adding new VLANs to an MST instance disrupt traffic flow for other
> VLANs in that MST instance?

Yes.  We've verified this.
A trunk port carrying only VLAN 30, or even an access port carrying
only VLAN 30.
VLAN 30 is in instance 2.  You go into config mode and add VLAN 50 to
instance 2 (or remove it from instance 2)
The port, be it access or trunk, goes to blocking, learning, forwarding.


-Geoff