[c-nsp] backup with STP

[lists at hojmark.org]

> And, putting MST vlan-to-instance configuration on every switch
> in the network just makes the configs look ugly ;-)

Well, it not *that* bad:

 spanning-tree mst configuration
  name WHATEVER
  revision 1
  instance 1 vlan 1 - 1000 , 2001 - 3000
  instance 2 vlan 1001 - 2000 , 3001 - 4094
 spanning-tree mode mst

Just wait until you start rolling out QoS and need configs like:

 wrr-queue bandwidth 5 25 20 20 20 5 5 
 wrr-queue queue-limit 5 25 10 10 10 5 5 
 wrr-queue random-det min-thres 1 80 100 100 100 100 100 100 100 
 wrr-queue random-det min-thres 2 80 100 100 100 100 100 100 100 
 wrr-queue random-det min-thres 3 80 100 100 100 100 100 100 100 
 wrr-queue random-det min-thres 4 80 100 100 100 100 100 100 100 
 wrr-queue random-det min-thres 5 80 100 100 100 100 100 100 100 
 wrr-queue random-det min-thres 6 80 100 100 100 100 100 100 100 
 wrr-queue random-det min-thres 7 80 100 100 100 100 100 100 100 
 wrr-queue random-det max-thres 1 100 100 100 100 100 100 100 100 
 wrr-queue random-det max-thres 2 100 100 100 100 100 100 100 100 
 wrr-queue random-detect 4 
 wrr-queue random-detect 5 
 wrr-queue random-detect 6 
 wrr-queue random-detect 7 
 wrr-queue cos-map 1 1 1 
 wrr-queue cos-map 2 1 0 
 wrr-queue cos-map 3 1 4 
 wrr-queue cos-map 4 1 2 
 wrr-queue cos-map 5 1 3 
 wrr-queue cos-map 6 1 6 
 wrr-queue cos-map 7 1 7 
 mls qos trust dscp

not on evey single box, but on every single *interface*.

-A