Здравствуте. Есть 2 свича DGS-3420-28SC. Не срабатывает переключение на резервный порт. Настройки STP почти дефолтные, только изменен Instance Priority на корневом свиче.
На портах зеркальные настройки вланов.
При отключении основного линка (порт 28), порт 25 продолжает работать в режиме "Backup"
Коммутатор A
Код:
#show config modified include "stp"
Command: show config modified include "stp"
config stp fbpdu enable
config stp priority 4096 instance_id 0
config stp ports 1-26 externalCost auto edge false p2p auto state disable restricted_role true restricted_tcn true
config stp ports 27-28 fbpdu enable
enable stp
#show stp ports 27
Command: show stp ports 27
MSTP Port Information
----------------------
Port Index : 27 , Hello Time: 2 /2 , Port STP : Enabled ,
External PathCost : Auto/2000 , Edge Port : False/No , P2P : Auto /Yes
Port RestrictedRole : False, Port RestrictedTCN : False
Port Forward BPDU : Enabled
MSTI Designated Bridge Internal PathCost Prio Status Role
----- ------------------ ----------------- ---- ---------- ----------
0 1000/9CD64304FC00 2000 128 Forwarding Designated
#show stp ports 28
Command: show stp ports 28
MSTP Port Information
----------------------
Port Index : 28 , Hello Time: 2 /2 , Port STP : Enabled ,
External PathCost : Auto/2000 , Edge Port : False/No , P2P : Auto /Yes
Port RestrictedRole : False, Port RestrictedTCN : False
Port Forward BPDU : Enabled
MSTI Designated Bridge Internal PathCost Prio Status Role
----- ------------------ ----------------- ---- ---------- ----------
0 1000/9CD64304FC00 2000 128 Forwarding Designated
#show stp instance
Command: show stp instance
STP Instance Settings
---------------------------
Instance Type : CIST
Instance Status : Enabled
Instance Priority : 4096 (Bridge Priority : 4096 , SYS ID Ext : 0 )
STP Instance Operational Status
--------------------------------
Designated Root Bridge : 4096 /9C-D6-43-04-FC-00
External Root Cost : 0
Regional Root Bridge : 4096 /9C-D6-43-04-FC-00
Internal Root Cost : 0
Designated Bridge : 4096 /9C-D6-43-04-FC-00
Root Port : None
Max Age : 20
Forward Delay : 15
Last Topology Change : 1479
Topology Changes Count : 7
Коммутатор B
Код:
Command: show config modified include "stp"
config stp fbpdu enable
config stp priority 16384 instance_id 0
config stp ports 1-24,26-27 externalCost auto edge true p2p auto state disable restricted_role true restricted_tcn true
config stp ports 25,28 fbpdu enable
enable stp
#show stp ports 25
Command: show stp ports 25
MSTP Port Information
----------------------
Port Index : 25 , Hello Time: 2 /2 , Port STP : Enabled ,
External PathCost : Auto/2000 , Edge Port : False/No , P2P : Auto /Yes
Port RestrictedRole : False, Port RestrictedTCN : False
Port Forward BPDU : Enabled
MSTI Designated Bridge Internal PathCost Prio Status Role
----- ------------------ ----------------- ---- ---------- ----------
0 4000/9CD643054400 2000 128 Discarding Backup
#show stp ports 28
Command: show stp ports 28
MSTP Port Information
----------------------
Port Index : 28 , Hello Time: 2 /2 , Port STP : Enabled ,
External PathCost : Auto/2000 , Edge Port : False/No , P2P : Auto /Yes
Port RestrictedRole : False, Port RestrictedTCN : False
Port Forward BPDU : Enabled
MSTI Designated Bridge Internal PathCost Prio Status Role
----- ------------------ ----------------- ---- ---------- ----------
0 1000/9CD64304FC00 2000 128 Forwarding Root
#show stp instance
Command: show stp instance
STP Instance Settings
---------------------------
Instance Type : CIST
Instance Status : Enabled
Instance Priority : 16384(Bridge Priority : 16384, SYS ID Ext : 0 )
STP Instance Operational Status
--------------------------------
Designated Root Bridge : 4096 /9C-D6-43-04-FC-00
External Root Cost : 2000
Regional Root Bridge : 16384/9C-D6-43-05-44-00
Internal Root Cost : 0
Designated Bridge : 4096 /9C-D6-43-04-FC-00
Root Port : 28
Max Age : 20
Forward Delay : 15
Last Topology Change : 1465
Topology Changes Count : 4