Имеется два dlink`а 3526 и cisco 2950 соединенные друг с другом(треугольник).
Необходимо организовать MSTP на них с двумя инстанциями( все пользователи подключенные к DLink3526-kr1 - "прикручены" к 1 инстанции, все пользователи подключенные к DLink3526-kr2 - "прикручены" к 2 инстанции). В качестве корневого свича для обоих инстанции выступает 2950. Трафик для 1 инстанции сливается против часовой стреклки(Fa0/5), для 2ой - по часовой(Fa0/6).
Нужен совет - что может быть не так настроено. Складывается такое впечатление что dlink`и держатся вместе, а cisco сама по себе.cisco 2950:
spanning-tree mode mst
spanning-tree loopguard default
spanning-tree portfast default
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
!
spanning-tree mst configuration
name region1
revision 10
instance 1 vlan 103, 108, 850
instance 2 vlan 104, 109
!
spanning-tree mst hello-time 1
spanning-tree mst forward-time 5
spanning-tree mst max-age 7
spanning-tree mst 0-2 priority 24576interface FastEthernet0/5
description DLink3526-kr1
switchport trunk allowed vlan 103,104,108,109,850
switchport mode trunk
speed 100
duplex full
spanning-tree portfast disable
!
interface FastEthernet0/6
description DLink3526-kr2
switchport trunk allowed vlan 103,104,108,109,850
switchport mode trunk
speed 100
duplex full
spanning-tree portfast disable-------------------------------------------------------------------------
DLink3526-kr1:
# STP
config stp maxage 20 maxhops 20 forwarddelay 15 txholdcount 3 fbpdu enable
config stp version mstp
config stp priority 32768 instance_id 0
config stp lbd enable
config stp lbd_recover_timer 60
create stp instance_id 1
config stp instance_id 1 add_vlan 103
config stp instance_id 1 add_vlan 108
config stp instance_id 1 add_vlan 850
config stp priority 32768 instance_id 1
create stp instance_id 2
config stp instance_id 2 add_vlan 104
config stp instance_id 2 add_vlan 109
config stp priority 32768 instance_id 2
config stp mst_config_id name region1 revision_level 10
enable stp
config stp ports 1-24 externalCost auto hellotime 1 edge true p2p true state disable
config stp ports 1-24 lbd disable
config stp mst_ports 1,25 instance_id 0 internalCost 200000 priority 128
config stp ports 1-24 fbpdu disable
config stp mst_ports 2-24,26 instance_id 0 internalCost auto priority 128
config stp ports 25-26 externalCost auto hellotime 1 edge false p2p true state enable
config stp ports 25-26 lbd enable
config stp ports 25-26 fbpdu enable
config stp mst_ports 1-26 instance_id 1 internalCost auto priority 128
config stp mst_ports 1-26 instance_id 2 internalCost auto priority 128Configuration Name : [region1 ] Revision Level :10
MSTI ID Vid list
------- -----------
CIST 1-102,105-107,110-849,851-4094
1 103,108,850
2 104,109-------------------------------------------------------------------------
DLink3526-kr2:
# STP
config stp maxage 20 maxhops 20 forwarddelay 15 txholdcount 3 fbpdu enable
config stp version mstp
config stp priority 32768 instance_id 0
config stp lbd enable
config stp lbd_recover_timer 60
create stp instance_id 1
config stp instance_id 1 add_vlan 103
config stp instance_id 1 add_vlan 108
config stp instance_id 1 add_vlan 850
config stp priority 32768 instance_id 1
create stp instance_id 2
config stp instance_id 2 add_vlan 104
config stp instance_id 2 add_vlan 109
config stp priority 32768 instance_id 2
config stp mst_config_id name region1 revision_level 10
enable stp
config stp ports 1-24 externalCost auto hellotime 1 edge true p2p true state disable
config stp ports 1-24 lbd disable
config stp mst_ports 1-26 instance_id 0 internalCost auto priority 128
config stp ports 1-24 fbpdu disable
config stp ports 25-26 externalCost auto hellotime 1 edge false p2p true state enable
config stp ports 25-26 lbd enable
config stp ports 25-26 fbpdu enable
config stp mst_ports 1-26 instance_id 1 internalCost auto priority 128
config stp mst_ports 1-26 instance_id 2 internalCost auto priority 128Configuration Name : [region1 ] Revision Level :10
MSTI ID Vid list
------- -----------
CIST 1-102,105-107,110-849,851-4094
1 103,108,850
2 104,109
-------------------------------------------------------------------------MST00
Spanning tree enabled protocol mstp
Root ID Priority 24576
Address 0011.5cad.d0c0
This bridge is the root
Hello Time 1 sec Max Age 7 sec Forward Delay 5 secBridge ID Priority 24576 (priority 24576 sys-id-ext 0)
Address 0011.5cad.d0c0
Hello Time 1 sec Max Age 7 sec Forward Delay 5 secInterface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1 Desg FWD 2000000 128.1 Edge P2p
Fa0/2 Desg FWD 2000000 128.2 Edge P2p
Fa0/3 Desg FWD 2000000 128.3 Edge P2p
Fa0/4 Desg FWD 200000 128.4 Edge P2p
Fa0/5 Desg FWD 200000 128.5 P2p Bound(RSTP)
Fa0/6 Desg FWD 200000 128.6 P2p Bound(RSTP)
Fa0/7 Desg FWD 200000 128.7 Edge P2p
Fa0/23 Desg FWD 200000 128.23 P2p
Fa0/24 Desg FWD 200000 128.24 P2p
MST01
Spanning tree enabled protocol mstp
Root ID Priority 24577
Address 0011.5cad.d0c0
This bridge is the root
Hello Time 1 sec Max Age 7 sec Forward Delay 5 secBridge ID Priority 24577 (priority 24576 sys-id-ext 1)
Address 0011.5cad.d0c0
Hello Time 1 sec Max Age 7 sec Forward Delay 5 secInterface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/5 Boun FWD 200000 128.5 P2p Bound(RSTP)
Fa0/6 Boun FWD 200000 128.6 P2p Bound(RSTP)
Fa0/23 Desg FWD 200000 128.23 P2p
Fa0/24 Desg FWD 200000 128.24 P2p
MST02
Spanning tree enabled protocol mstp
Root ID Priority 24578
Address 0011.5cad.d0c0
This bridge is the root
Hello Time 1 sec Max Age 7 sec Forward Delay 5 secBridge ID Priority 24578 (priority 24576 sys-id-ext 2)
Address 0011.5cad.d0c0
Hello Time 1 sec Max Age 7 sec Forward Delay 5 secInterface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/5 Boun FWD 200000 128.5 P2p Bound(RSTP)
Fa0/6 Boun FWD 200000 128.6 P2p Bound(RSTP)
Fa0/23 Desg FWD 200000 128.23 P2p-----------------------------
Dlink-kr1STP Instance Settings
---------------------------
Instance Type : CIST
Instance Status : Enabled
Instance Priority : 32768(bridge priority : 32768, sys ID ext : 0 )STP Instance Operational Status
--------------------------------
Designated Root Bridge : 24576/00-11-5C-AD-D0-C0
External Root Cost : 200000
Regional Root Bridge : 32768/00-15-E9-4A-EC-13
Internal Root Cost : 200000
Designated Bridge : 32768/00-15-E9-4A-EC-13
Root Port : 26
Max Age : 7
Forward Delay : 5
Last Topology Change : 3589
Topology Changes Count : 47Command: show stp instance_id
STP Instance Settings
---------------------------
Instance Type : MSTI(1)
Instance Status : Enabled
Instance Priority : 32769(bridge priority : 32768, sys ID ext : 1 )STP Instance Operational Status
--------------------------------
Regional Root Bridge : 32769/00-15-E9-4A-EC-13
Internal Root Cost : 200000
Designated Bridge : 32769/00-15-E9-4A-EC-13
Root Port : 26
Remaining Hops : 19
Last Topology Change : 3595
Topology Changes Count : 39Command: show stp instance_id
STP Instance Settings
---------------------------
Instance Type : MSTI(2)
Instance Status : Enabled
Instance Priority : 32770(bridge priority : 32768, sys ID ext : 2 )STP Instance Operational Status
--------------------------------
Regional Root Bridge : 32770/00-15-E9-4A-EC-13
Internal Root Cost : 200000
Designated Bridge : 32770/00-15-E9-4A-EC-13
Root Port : 26
Remaining Hops : 19
Last Topology Change : 3605
Topology Changes Count : 24
---------------------------
Dlink-kr2Command: show stp instance_id
STP Instance Settings
---------------------------
Instance Type : CIST
Instance Status : Enabled
Instance Priority : 32768(bridge priority : 32768, sys ID ext : 0 )STP Instance Operational Status
--------------------------------
Designated Root Bridge : 24576/00-11-5C-AD-D0-C0
External Root Cost : 200000
Regional Root Bridge : 32768/00-15-E9-4A-EC-13
Internal Root Cost : 200000
Designated Bridge : 32768/00-15-E9-4A-EC-13
Root Port : 26
Max Age : 7
Forward Delay : 5
Last Topology Change : 3639
Topology Changes Count : 47Command: show stp instance_id
STP Instance Settings
---------------------------
Instance Type : MSTI(1)
Instance Status : Enabled
Instance Priority : 32769(bridge priority : 32768, sys ID ext : 1 )STP Instance Operational Status
--------------------------------
Regional Root Bridge : 32769/00-15-E9-4A-EC-13
Internal Root Cost : 200000
Designated Bridge : 32769/00-15-E9-4A-EC-13
Root Port : 26
Remaining Hops : 19
Last Topology Change : 3643
Topology Changes Count : 39Command: show stp instance_id
STP Instance Settings
---------------------------
Instance Type : MSTI(2)
Instance Status : Enabled
Instance Priority : 32770(bridge priority : 32768, sys ID ext : 2 )STP Instance Operational Status
--------------------------------
Regional Root Bridge : 32770/00-15-E9-4A-EC-13
Internal Root Cost : 200000
Designated Bridge : 32770/00-15-E9-4A-EC-13
Root Port : 26
Remaining Hops : 19
Last Topology Change : 3649
Topology Changes Count : 24
Похоже в данной ситуации самый простостой способ это просто отключить stp как таковой на dlink`ах оставив его только на 2950 :) тем самым избавимся от гемора поддерживать соответствие в инстанциях на dlink`ах и получим блокировку в разных инстанциях на разных портах сisco.