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interface GigabitEthernet0/26 switchport trunk encapsulation dot1q switchport trunk native vlan 5 switchport trunk allowed vlan 5,10,20,99 switchport mode trunk
switchport nonegotiate
!
interface GigabitEthernet0/27 switchport trunk encapsulation dot1q switchport trunk native vlan 5 switchport trunk allowed vlan 5,10,20,99 switchport mode trunk
!
interface GigabitEthernet0/28
!
interface Vlan1
no ip address
interface Vlan10
ip address 10.10.0.245 255.255.255.0
!ip address 10.10.0.246 255.255.255.0 on Core2
interface Vlan20
ip address 10.20.0.245 255.255.255.0
!ip address 10.20.0.246 255.255.255.0 on Core2
interface Vlan99
ip address 10.99.0.245 255.255.255.0
!ip address 10.99.0.245 255.255.255.0 on Core2
ip
ip route 0.0.0.0 0.0.0.0 9.42.171.3 ip http server
ip http
line con 0 line vty 0 4 password cisco no login line vty 5 15 no login
end
7.7.4Multi-Spanning Tree IEEE 802.1s
During the writing of this book, it was not possible to create and test a stable configuration with the GbESM and the Cisco 3560 devices both configured to run MSTP. After our testing was completed, we learned that this is remedied in IOS version 12.2(25)SEC on the Cisco 3750. We assume that similarly numbered versions on other platforms will also include this fix.
Configurations for use of MST
The MST (802.1s) protocol, like the prestandard multiple spanning tree group capability of the GbESM, allows for multiple instances of spanning tree to run at the same time. Each
Chapter 7. Nortel Networks L2/3 GbESM configuration and network integration 101