Multiple Spanning Tree (MST)
Multiple Spanning-Tree (MST)¶
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SW1
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Конфиг
spanning-tree mode mst spanning-tree mst configuration name WSR39 instance 1 vlan 1000, 1200, 1300 instance 2 vlan 1500, 1600 exit spanning-tree mst 1 root primary -
Проверка
SW1#show spanning-tree mst ##### MST0 vlans mapped: 1-999,1001-1199,1201-1299,1301-1499,1501-1599 1601-4094 Bridge address 0c3d.c029.5400 priority 32768 (32768 sysid 0) Root this switch for the CIST Operational hello time 2 , forward delay 15, max age 20, txholdcount 6 Configured hello time 2 , forward delay 15, max age 20, max hops 20 Interface Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- -------------------------------- Gi0/2 Desg FWD 20000 128.3 P2p Gi0/3 Desg FWD 20000 128.4 P2p Gi1/2 Desg FWD 20000 128.7 P2p Gi1/3 Desg FWD 20000 128.8 P2p Gi2/0 Desg FWD 20000 128.9 P2p Gi2/1 Desg FWD 20000 128.10 P2p Gi2/2 Desg FWD 20000 128.11 P2p Gi2/3 Desg FWD 20000 128.12 P2p Gi3/0 Desg FWD 20000 128.13 P2p Gi3/1 Desg FWD 20000 128.14 P2p Gi3/2 Desg FWD 20000 128.15 P2p Gi3/3 Desg FWD 20000 128.16 P2p Po1 Desg FWD 10000 128.65 P2p Po2 Desg FWD 10000 128.66 P2p ##### MST1 vlans mapped: 1000,1200,1300 Bridge address 0c3d.c029.5400 priority 24577 (24576 sysid 1) Root this switch for MST1 Interface Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- -------------------------------- Gi2/0 Desg FWD 20000 128.9 P2p Po1 Desg FWD 10000 128.65 P2p Po2 Desg FWD 10000 128.66 P2p ##### MST2 vlans mapped: 1500,1600 Bridge address 0c3d.c029.5400 priority 32770 (32768 sysid 2) Root address 0c3d.c0a9.7500 priority 24578 (24576 sysid 2) port Po2 cost 10000 rem hops 19 Interface Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- -------------------------------- Gi2/0 Desg FWD 20000 128.9 P2p Po1 Desg FWD 10000 128.65 P2p Po2 Root FWD 10000 128.66 P2p -
SW2
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Конфиг
spanning-tree mode mst spanning-tree mst configuration name WSR39 instance 1 vlan 1000, 1200, 1300 instance 2 vlan 1500, 1600 exit spanning-tree mst 2 root primary -
Проверка
SW2#show spanning-tree mst ##### MST0 vlans mapped: 1-999,1001-1199,1201-1299,1301-1499,1501-1599 1601-4094 Bridge address 0c3d.c0a9.7500 priority 32768 (32768 sysid 0) Root address 0c3d.c029.5400 priority 32768 (32768 sysid 0) port Po2 path cost 0 Regional Root address 0c3d.c029.5400 priority 32768 (32768 sysid 0) internal cost 10000 rem hops 19 Operational hello time 2 , forward delay 15, max age 20, txholdcount 6 Configured hello time 2 , forward delay 15, max age 20, max hops 20 Interface Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- -------------------------------- Gi0/2 Desg FWD 20000 128.3 P2p Gi0/3 Desg FWD 20000 128.4 P2p Gi1/0 Desg FWD 20000 128.5 P2p Gi1/1 Desg FWD 20000 128.6 P2p Gi1/2 Desg FWD 20000 128.7 P2p Gi1/3 Desg FWD 20000 128.8 P2p Gi2/0 Desg FWD 20000 128.9 P2p Gi2/1 Desg FWD 20000 128.10 P2p Gi2/2 Desg FWD 20000 128.11 P2p Gi2/3 Desg FWD 20000 128.12 P2p Gi3/0 Desg FWD 20000 128.13 P2p Gi3/1 Desg FWD 20000 128.14 P2p Gi3/2 Desg FWD 20000 128.15 P2p Gi3/3 Desg FWD 20000 128.16 P2p Po2 Root FWD 10000 128.66 P2p ##### MST1 vlans mapped: 1000,1200,1300 Bridge address 0c3d.c0a9.7500 priority 32769 (32768 sysid 1) Root address 0c3d.c029.5400 priority 24577 (24576 sysid 1) port Po2 cost 10000 rem hops 19 Interface Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- -------------------------------- Gi0/2 Desg FWD 20000 128.3 P2p Gi2/0 Desg FWD 20000 128.9 P2p Po2 Root FWD 10000 128.66 P2p ##### MST2 vlans mapped: 1500,1600 Bridge address 0c3d.c0a9.7500 priority 24578 (24576 sysid 2) Root this switch for MST2 Interface Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- -------------------------------- Gi0/2 Desg FWD 20000 128.3 P2p Po2 Desg FWD 10000 128.66 P2p -
SW3
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Конфиг
spanning-tree mode mst spanning-tree mst configuration name WSR39 instance 1 vlan 1000, 1200, 1300 instance 2 vlan 1500, 1600 exit -
Проверка
SW3#show span mst ##### MST0 vlans mapped: 1-999,1001-1199,1201-1299,1301-1499,1501-1599 1601-4094 Bridge address 0c3d.c0c5.1500 priority 32768 (32768 sysid 0) Root address 0c3d.c029.5400 priority 32768 (32768 sysid 0) port Po1 path cost 0 Regional Root address 0c3d.c029.5400 priority 32768 (32768 sysid 0) internal cost 10000 rem hops 19 Operational hello time 2 , forward delay 15, max age 20, txholdcount 6 Configured hello time 2 , forward delay 15, max age 20, max hops 20 Interface Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- -------------------------------- Gi0/0 Desg FWD 20000 128.1 P2p Gi0/1 Desg FWD 20000 128.2 P2p Gi0/2 Altn BLK 20000 128.3 P2p Gi0/3 Desg FWD 20000 128.4 P2p Gi1/2 Desg FWD 20000 128.7 P2p Gi1/3 Desg FWD 20000 128.8 P2p Gi2/0 Desg FWD 20000 128.9 P2p Gi2/1 Desg FWD 20000 128.10 P2p Gi2/2 Desg FWD 20000 128.11 P2p Gi2/3 Desg FWD 20000 128.12 P2p Gi3/0 Desg FWD 20000 128.13 P2p Gi3/1 Desg FWD 20000 128.14 P2p Gi3/2 Desg FWD 20000 128.15 P2p Gi3/3 Desg FWD 20000 128.16 P2p Po1 Root FWD 10000 128.65 P2p ##### MST1 vlans mapped: 1000,1200,1300 Bridge address 0c3d.c0c5.1500 priority 32769 (32768 sysid 1) Root address 0c3d.c029.5400 priority 24577 (24576 sysid 1) port Po1 cost 10000 rem hops 19 Interface Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- -------------------------------- Gi0/2 Altn BLK 20000 128.3 P2p Gi2/0 Desg FWD 20000 128.9 P2p Po1 Root FWD 10000 128.65 P2p ##### MST2 vlans mapped: 1500,1600 Bridge address 0c3d.c0c5.1500 priority 32770 (32768 sysid 2) Root address 0c3d.c0a9.7500 priority 24578 (24576 sysid 2) port Gi0/2 cost 20000 rem hops 19 Interface Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- -------------------------------- Gi0/2 Root FWD 20000 128.3 P2p Po1 Altn BLK 10000 128.65 P2p