Catalyst2台とHP2530を1台を使ってSTPを再現します。
環境
- Cisco WS-C3560CG-8PC-S 12.2(55)EX3
- HP2530 YB.16.10.0011
i/fの情報
役割(Role)の意味
- Root:ルートポート
- Desg:指定ポート
- Altn:非指定ポート
状態(Sts)の意味
- FWD:フォワーディング
- LIS:リスニング
- LRN:ラーニング
- BLK:ブロッキング
構成イメージ図
HP2530設定
ブリッジプライオリティを12288(4096×3)に変更。
3台の内、最もプライオリティの値を大きくすることで、このスイッチのポート3をブロッキングになるように設定。
HP2530(config)# spanning-tree vlan 50 priority 3
HP2530(config)# show running-config
Running configuration:
; J9779A Configuration Editor; Created on release #YB.16.10.0011
; Ver #14:41.44.00.04.19.02.13.98.82.34.61.18.28.c3.84.9c.63.ff.37.27:35
hostname "HP2530"
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vlan 1
name "DEFAULT_VLAN"
no untagged 1-2
untagged 3-28
-- MORE --, next page: Space, next line: Enter, quit: Control-C ip address dhcp-bootp
exit
vlan 15
name "Radius"
untagged 2
no ip address
exit
vlan 40
name "hoge"
untagged 1
ip address 192.0.2.1 255.255.255.0
exit
vlan 50
name "STP_test"
tagged 3-4
no ip address
exit
spanning-tree
spanning-tree mode rapid-pvst
spanning-tree vlan 50 priority 3
no tftp server
loop-protect 3-4 receiver-action no-disable
loop-protect transmit-interval 10 disable-timer 60
-- MORE --, next page: Space, next line: Enter, quit: Control-Cno dhcp config-file-update
no dhcp image-file-update
no dhcp tr69-acs-url
HP2530(config)# show spanning-tree vlan 50
Spanning Tree Information
STP Enabled [No] : Yes
Mode : RPVST
Extended System ID : Enabled
Ignore PVID Inconsistency : Disabled
Switch MAC Address : 1402ec-1de4a0
VLAN ID : 50
RPVST Enabled : Enabled
Root MAC Address : 34a84e-da1680
Root Priority : 0
Root Path Cost : 200,000
Root Port : 4
Operational Hello Time (secs) : 2
Topology Change Count : 16
Time Since Last Change : 2 mins
-- MORE --, next page: Space, next line: Enter, quit: Control-C Root Inconsistent Ports :
Loop Inconsistent Ports :
PVID Inconsistent Ports :
Designated
Port Type Cost Priority Role State Bridge
----- ---------- --------- --------- ---------- ---------- ---------------
3 10/100TX 200000 128 Alternate Blocking 34a84e-6e7800
4 10/100TX 200000 128 Root Forwarding 34a84e-da1680
Catalyst1設定
ルートブリッジになるように設定
Switch123(config)#spanning-tree vlan 50 priority 0
Switch123#show spanning-tree vlan 50
VLAN0050
Spanning tree enabled protocol ieee
Root ID Priority 50
Address 34a8.4eda.1680
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 50 (priority 0 sys-id-ext 50)
Address 34a8.4eda.1680
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 15 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Gi0/4 Desg FWD 4 128.4 P2p
Gi0/6 Desg FWD 19 128.6 P2p
Catalyst2設定
プライオリティが4096になるように設定(正確には4096+VLAN番号50=4146になる)
Switch456(config)#spanning-tree vlan 50 priority 4096
Switch456#show spanning-tree vlan 50
VLAN0050
Spanning tree enabled protocol ieee
Root ID Priority 50
Address 1402.ec1d.e4a0
Cost 19
Port 3 (GigabitEthernet0/3)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 4146 (priority 4096 sys-id-ext 50)
Address 34a8.4e6e.7800
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Gi0/2 Desg FWD 4 128.2 P2p
Gi0/3 Root FWD 19 128.3 P2p