3Com Switch 8800 Family Configuration Guide

156 CHAPTER 18: DIGEST SNOOPING CONFIGURATION
Prerequisites Switches of different manufacturers are interconnected in a network and have
MSTP employed. The network operates properly.
Configuration Procedure
n
■ You must enable digest snooping on an port first before enabling it globally.
■ Digest snooping is unnecessary if the interconnected switches are from the
same manufacturer.
■ To enable digest snooping, the interconnected switches must be configured
with the same settings.
■ To enable digest snooping, all ports in an MSTP region connecting to switches
from other manufacturers must have digest snooping enabled.
■ Do not enable digest snooping on border ports of an MSTP region.
Digest Snooping
Configuration Example
Network requirements
All switches in Figure 32 are MSTP-enabled and have the same region
configuration. All the switches except that A are of 3Com Technology Co., Ltd.
Tabl e 137 Configure digest snooping
Configuration step Command Description
Enter system view system-view -
Enter Ethernet interface view
interface interface-type
interface-number
interface-type: Interface type
interface-number: Interface
number
Enable digest snooping on the
port
stp config-digest-snooping
Required. Digest snooping is
disabled by default on the
port.
Quit Ethernet interface view quit -
Enable digest snooping
globally
stp config-digest-snooping
Required. Digest snooping is
disabled by default.
Display current configuration
information
display
current-configuration
This command can be
executed in any view.