IBM RackSwitch G8000 - MSTP Configuration Examples

128 RackSwitch G8000: Application Guide
• Each bridge in the region must have the same name, version number, and VLAN
mapping.
MSTP Configuration Examples
Example 1
This section provides steps to configure MSTP on the G8000.
1. Configure port and VLAN membership on the switch.
2. Set the mode to Multiple Spanning Tree, and configure MSTP region
parameters.
3. Assign VLANs to Spanning Tree Groups.
Example 2
This configuration shows how to configure MSTP Groups on the switch, as shown in
Figure 13.
Figure 14. Implementing Multiple Spanning Tree Groups
This example shows how multiple Spanning Trees can provide redundancy without
wasting any uplink ports. In this example, the server ports are split between two
separate VLANs. Both VLANs belong to two different MSTP groups. The Spanning
RS G8000(config)# spanning-tree mode mst
RS G8000(config)# spanning-tree mstp name <name>
RS G8000(config)# vlan 2
RS G8000(config-vlan)# stg 2
RS G8000(config-vlan)# exit
Enterprise
Routing Switch
MSTP Group 1
Root
Enterprise
Routing Switch
MSTP Group 2
Root
Server 1
VLAN 1
Server 2
VLAN 1
Server 3
VLAN 2
Server 4
VLAN 2
Blocking VLAN 1
Passing VLAN 2
Passing VLAN 1
Blocking VLAN 2