H3C S3100-52P Operation Manual page 265

Operation Manual – MSTP
H3C S3100-52P Ethernet Switch
Configuring MST region-related parameters (especially the VLAN-to-MSTI mapping
table) results in spanning tree recalculation and network topology jitter. To reduce
network topology jitter caused by the configuration, MSTP does not recalculate
spanning trees immediately after the configuration; it does this only after you perform
one of the following operations, and then the configuration can really takes effect:
Activate
region-configuration command
Enable MSTP by using the stp enable command
Note:
MSTP-enabled switches are in the same region only when they have the same
format selector (a 802.1s-defined protocol selector, which is 0 by default and cannot
be configured), MST region name, VLAN-to-MSTI mapping table, and revision level.
The H3C series support only the MST region name, VLAN-to-MSTI mapping table,
and revision level. Switches with the settings of these parameters being the same
are assigned to the same MST region.
II. Configuration example
# Configure an MST region named info, the MSTP revision level being level 1, VLAN 2
through VLAN 10 being mapped to MSTI 1, and VLAN 20 through VLAN 30 being
mapped to MSTI 2.
<Sysname> system-view
[Sysname] stp region-configuration
[Sysname-mst-region] region-name info
[Sysname-mst-region] instance 1 vlan 2 to 10
[Sysname-mst-region] instance 2 vlan 20 to 30
[Sysname-mst-region] revision-level 1
[Sysname-mst-region] active region-configuration
# Verify the above configuration.
[Sysname-mst-region] check region-configuration
Admin configuration
Format selector
Region name
Revision level
Instance
0
1
the new MST region-related
:0
:info
:1
Vlans Mapped
1, 11 to 19, 31 to 4094
2 to 10
1-21
Chapter 1 MSTP Configuration
settings by using the
active