Hello,
I facing with problem of configuration MSTP on Cisco Small business switches (SBS). I set MSTP on all switches that doesn't support PVST (please see attachment). Networks works fine but when I look at webmanagement of this SBS only RSTP is displayed.
I expected that connection between created link aggregation should run with MTSP but I was wrong. Where could be a mistake?
Cisco 4507 runs with PVST that could be compatible with MSTP according this configuration: http://networktest.com/hpiop/hpiopcookbook.pdf on page 25.
Configuration of Cisco 4507 (core switch) is following
spanning-tree mode pvst
spanning-tree extend system-id
spanning-tree vlan 1-5,7,10-13,15,20,23,40,98-99,102-103,106-109 priority 24576
spanning-tree vlan 300,375 priority 24576
interface Port-channel1
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,5,10,40,98,99,102-109,375
switchport mode trunk
interface GigabitEthernet1/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,5,10,40,98,99,102-109,375
switchport mode trunk
channel-group 1 mode active
interface GigabitEthernet2/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,5,10,40,98,99,102-109,375
switchport mode trunk
channel-group 1 mode active
Configuration of stack Cisco SG500X-24 is following
spanning-tree mode mst
spanning-tree mst configuration
instance 1 vlan 5
instance 2 vlan 10
instance 3 vlan 40
instance 4 vlan 102
instance 5 vlan 103
instance 6 vlan 106
instance 7 vlan 107
instance 8 vlan 108
instance 9 vlan 109
instance 10 vlan 98
instance 11 vlan 99
name region1
interface tengigabitethernet1/1/1
speed 1000
channel-group 1 mode auto
!
interface tengigabitethernet1/1/2
speed 1000
channel-group 2 mode auto
!
interface tengigabitethernet2/1/1
speed 1000
channel-group 2 mode auto
!
interface tengigabitethernet2/1/2
speed 1000
channel-group 1 mode auto
!
interface Port-channel1
speed 1000
no negotiation
description HQ
spanning-tree bpdu filtering
switchport trunk allowed vlan add 5,10,40,98-99,102-103,106-109
!
interface Port-channel2
speed 1000
no negotiation
description BRANCH
switchport trunk allowed vlan add 5,10,40,98-99,102-103,106-109
switchport default-vlan tagged
Configuration of Cisco SG500-52P is following
spanning-tree mode mst
spanning-tree mst configuration
instance 1 vlan 5
instance 2 vlan 10
instance 3 vlan 40
instance 4 vlan 102
instance 5 vlan 103
instance 6 vlan 106
instance 7 vlan 107
instance 8 vlan 108
instance 9 vlan 109
name region1
interface gigabitethernet1/51
channel-group 1 mode auto
!
interface gigabitethernet1/52
channel-group 1 mode auto
!
interface Port-channel1
speed 1000
no negotiation
description BRANCH
switchport trunk allowed vlan add 5,10,40,98-99,102-103,106-109
switchport default-vlan tagged
Thank you
Petr
