В качестве примера будем использовать схему, изображенную на рисунке 1:
Рисунок 1 - Схема включения
Запустим RSTP на маршрутизаторе R3, а также сделаем его корневым:
spanning-tree rstp bridge-priority 4096 <============= Задаем приоритет устройству. interface tengigabitethernet 0/0/1 path-cost 50 <=================== Указываем стоимость пути через заданный интерфейс. exit interface tengigabitethernet 0/0/2 path-cost 10 exit exit exit
На маршрутизаторах R1 и R2 RSTP настраивается аналогичным образом:
spanning-tree rstp interface tengigabitethernet 0/0/2 path-cost 20 exit interface tengigabitethernet 0/0/3 path-cost 50 exit exit exit
Проверим состояние RSTP на маршрутизаторе R1:
0/ME5100:R1# show spanning-tree rstp detail Wed Oct 18 03:36:40 2023 RSTP operates in 802.1D bridge mode <======================= Тип настроенного STP. Configured hello time is 2 sec, maximum age is default operational 200/600, forward delay is 15 sec. <============= Таймеры RSTP. Root ID Address E0:D9:E3:FF:62:00 <============ MAC адрес корневого устройства. Priority 4096 <========================= Приоритет корневого устройства. Root port 3 Root hops 2 Path cost 30 Bridge ID Address e0:d9:e3:ff:60:a0<============= MAC адрес устройства. Priority 32768 Number of topology changes 9, last occurred 904 sec ago. Port 3 te0/0/2 is Root fwd <================================ Корневой интерфейс. Port operational status is up Port path cost is 20, port priority is 128, identifier is 128.3 Designated root E0:D9:E3:FF:62:00 has priority 4096, designated root cost is 10. Designated bridge E0:D9:E3:FF:60:C0 has priority 32768. Designated port is 2 Port in uptime 00h02m25s Number of transitions to forwarding state: 4 Port state flags: p2p Port configuration flags: p2p rootguard false, TCN-guard false, bpduguard false, portfast false. Port 4 te0/0/3 is Altn blk <=============================== Заблокированный интерфейс. Port operational status is up Port path cost is 50, port priority is 128, identifier is 128.4 Designated root E0:D9:E3:FF:62:00 has priority 4096, designated root cost is 0. Designated bridge E0:D9:E3:FF:62:00 has priority 4096. Designated port is 2 Port in uptime 00h02m25s Number of transitions to forwarding state: 5 Port state flags: p2p Port configuration flags: p2p rootguard false, TCN-guard false, bpduguard false, portfast false.
MAC адрес устройства можно посмотреть следующим образом:
0/ME5100:R1# show system Fri Oct 18 03:50:17 2023 System type: Eltex ME5100 carrier router System name: R1 System software: Eltex Network OS for ME5k version 3.6.0.198R System uptime: 2 days, 6 hours, 48 minutes System restarted at: Wed Oct 18 02:13:43 2023 System MAC address: e0:d9:e3:ff:60:a0 <============ MAC адрес устройства. Power supply 1 is not present Power supply 2 is present, status ON System has no active/unconfirmed alarms
Проверим состояние RSTP на маршрутизаторе R3:
0/ME5100:R3# show spanning-tree rstp detail Wed Oct 18 03:45:25 2023 RSTP operates in 802.1D bridge mode Configured hello time is 2 sec, maximum age is default operational 200/600, forward delay is 15 sec. Root ID Address E0:D9:E3:FF:62:00 Priority 4096 Root port 0 Root hops 0 Path cost 0 Bridge ID Address e0:d9:e3:ff:62:00 Priority 4096 Number of topology changes 7, last occurred 1327 sec ago. Port 2 te0/0/1 is Dsgn fwd Port operational status is up Port path cost is 50, port priority is 128, identifier is 128.2 Designated root E0:D9:E3:FF:62:00 has priority 4096, designated root cost is 0. Designated bridge E0:D9:E3:FF:62:00 has priority 4096. Designated port is 2 Port in uptime 00h02m24s Number of transitions to forwarding state: 2 Port state flags: p2p Port configuration flags: p2p rootguard false, TCN-guard false, bpduguard false, portfast false. Port 3 te0/0/2 is Dsgn fwd Port operational status is up Port path cost is 10, port priority is 128, identifier is 128.3 Designated root E0:D9:E3:FF:62:00 has priority 4096, designated root cost is 0. Designated bridge E0:D9:E3:FF:62:00 has priority 4096. Designated port is 3 Port in uptime 00h02m24s Number of transitions to forwarding state: 2 Port state flags: p2p Port configuration flags: p2p rootguard false, TCN-guard false, bpduguard false, portfast false.