H3C S9500 Series Operation Manual page 145

Operation Manual – MSTP
H3C S9500 Series Routing Switches
Enter system view
Enter
Ethernet
interface or
port group
view
Enable digest snooping on
the interface or port group
Return to system view
Enable global digest
snooping
Caution:
You can only enable the Digest Snooping feature on the device connected to
another vendor's device that use private key to compute the configuration digest.
With the Digest Snooping feature enabled, comparison of configuration digest is not
needed for in-the-same-region check, so the VLAN-to-MSTI mappings must be the
same on associated ports.
With global Digest Snooping enabled, modification of VLAN-to-MSTI mappings and
removing
region-configuration command are not allowed. You can only modify the region
name and revision level.
You need to enable this feature both globally and on associated ports to make it
take effect. It is recommended to enable the feature on all associated ports first and
then globally, making all configured ports take effect, and disable the feature
globally to disable it on all associated ports.
It is not recommended to enable Digest Snooping on the MST region edge port to
avoid loops.
Do not enable Digest Snooping when the network works well to avoid traffic
interruption.
To do...
system-view
Enter
Ethernet
interface interface-type
interface
interface-number
view
port-group { manual
Enter port
port-group-name |
group view
aggregation agg-id }
stp
config-digest-snooping
quit
stp
config-digest-snooping
of the current
Use the command...
region configuration
1-42
Chapter 1 MSTP Configuration
Remarks
—
Choose either
Required
Not enabled by default
—
Required
Not enabled by default
using the
undo stp