3Com Switch 7750 Configuration Guide Guide

Root Bridge Configuration 229
n
In a network that contains switches with both GVRP and MSTP employed, GVRP
packets are forwarded along the CIST. If you want to broadcast packets of a
specific VLAN through GVRP, be sure to map the VLAN to the CIST when
configuring the MSTP VLAN mapping table (The CIST of a network is the spanning
tree instance numbered 0.)
Prerequisites The status of the switches in the spanning trees are determined. That is, the status
(root, branch, or leaf) of each switch in each spanning tree instance is determined.
MST Region
Configuration
Configuration procedure
Network diameter
configuration
Optional
The default is recommended.
“Network Diameter
Configuration”
MSTP time-related
configuration
Optional
The defaults are
recommended.
“MSTP Time-related
Configuration”
Timeout time factor
configuration
Optional
“Timeout Time Factor
Configuration”
Maximum transmitting speed
configuration
Optional
The default is recommended.
“Maximum Transmitting
Speed Configuration”
Edge port configuration Optional “Edge Port Configuration”
Point-to-point link related
configuration
Optional
“Point-to-point Link-Related
Configuration”
Table 154 Root bridge configuration
Operation Remarks Related section
Table 155 Configure an MST region
Operation Command Description
Enter system view system-view -
Enter MST region view stp region-configuration -
Configure a name for the
MST region
region-name name
Required
The default MST region name
of a switch is its MAC address.
Configure the VALN mapping
table for the MST region
instance instance-id vlan
vlan-list
Required
Both commands can be used
to configure VLAN mapping
tables.
By default, all VLANs in an
MST region are mapped to
spanning tree instance 0.
vlan-mapping modulo
modulo
Configure the MSTP revision
level for the MST region
revision-level level
Required
The default revision level of an
MST region is level 0.
Activate the configuration of
the MST region manually
active region-configuration Required
Display the configuration of
the current MST region
check region-configuration Optional