3com 8807 User Guide

Page of 883
156
C
HAPTER
 18: D
IGEST
 S
NOOPING
 C
ONFIGURATION
Prerequisites
Switches of different manufacturers are interconnected in a network and have 
MSTP employed. The network operates properly.
Configuration Procedure
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.
Table 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.