# STP

enable stp
config stp version mstp
config stp maxage 20 maxhops 20 forwarddelay 15 txholdcount 3 fbpdu enable lbd enable lbd_recover_timer 60
config stp priority 32768 instance_id 0
config stp mst_config_id name arbekovo revision_level 0
config stp trap new_root enable topo_change enable
config stp ports 1-24 externalCost auto hellotime 1 edge true p2p auto state disable lbd disable
config stp ports 1-24 hellotime 1
config stp mst_ports 1-28 instance_id 0 internalCost auto priority 128
config stp ports 1-24 fbpdu disable
config stp ports 1-28 restricted_role false
config stp ports 1-28 restricted_tcn false
config stp ports 25-28 externalCost auto hellotime 2 edge false p2p auto state enable lbd disable
config stp ports 25-28 hellotime 2
config stp ports 25-28 fbpdu enable

spanning-tree mode mst
spanning-tree extend system-id
!
spanning-tree mst configuration
 name arbekovo
!
spanning-tree mst 0 priority 28672
!
interface GigabitEthernet0/7
 switchport trunk allowed vlan none
 switchport mode trunk
 spanning-tree guard root
 service instance 1 ethernet
  encapsulation untagged
  l2protocol peer stp
  bridge-domain 1 split-horizon group 1
 !
 service instance 85 ethernet
  encapsulation dot1q 4-5
  bridge-domain 85
 !
 service instance 2000 ethernet
  encapsulation dot1q 6,1020,1022,1025,1901,1914-1916,1974
  bridge-domain 2000
 !
!