Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 72)

NOTE
If you add a new master VLAN to a topology group that already has a master VLAN, the new master
VLAN replaces the older master VLAN. All member VLANs and VLAN groups follow the Layer 2
protocol settings of the new master VLAN.
Syntax: [no] member-vlan vlan-id
The vlan-id parameter specifies a VLAN ID. The VLAN must already be configured.
Syntax: [no] member-group num
The num specifies a VLAN group ID. The VLAN group must already be configured.
NOTE
Once you add a VLAN or VLAN group as a member of a topology group, all the Layer 2 protocol
configuration information for the VLAN or group is deleted. For example, if STP is configured on a
VLAN and you add the VLAN to a topology group, the STP configuration is removed from the VLAN.
Once you add the VLAN to a topology group, the VLAN uses the Layer 2 protocol settings of the
master VLAN. If you remove a member VLAN or VLAN group from a topology group, you will need to
reconfigure the Layer 2 protocol information in the VLAN or VLAN group.
Displaying topology group information
The following sections show how to display STP information and topology group information for
VLANS.
Displaying STP information
To display STP information for a VLAN, enter a command such as the following.
device#show span vlan 4
VLAN 4 BPDU cam_index is 14344 and the Master DMA Are(HEX) 18 1A
STP instance owned by VLAN 2
This example shows STP information for VLAN 4. The line shown in bold type indicates that the VLAN
STP configuration is controlled by VLAN 2. This information indicates that VLAN 4 is a member of a
topology group and VLAN 2 is the master VLAN in that topology group.
Displaying topology group information
To display topology group information, enter the following command.
device#show topology-group
Topology Group 3
=================
master-vlan 2
member-vlan none
Common control ports L2 protocol
ethernet 1/1 MRP
ethernet 1/2 MRP
ethernet 1/5 VSRP
ethernet 2/22 VSRP
Per vlan free ports
ethernet 2/3 Vlan 2
ethernet 2/4 Vlan 2
ethernet 2/11 Vlan 2
ethernet 2/12 Vlan 2
Displaying topology group information
72 FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide
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