3Com 5500G, 4210, 4200G # Set the priority of Switch B to, # Enable digest snooping on Switch B

Configuring Digest Snooping and Rapid Transition 89

Network Diagram Figure 25 Network diagram for digest snooping and rapid transition configuration

	Switch A
Eth 1/0/1	Eth 1/0/2

Networking and

Configuration

Requirements

Eth 1/0/1			Eth 1/0/1
Switch B			Switch C
	Eth 1/0/2	Eth 1/0/2

■Use another vendor’s switch, Switch A in this scenario, as the root switch.

■Switch B and Switch C are connected to Switch A.

For Switch B:

■Set the priority of Switch B to 4096.

■Enable rapid transition and digest snooping on Switch B.

For Switch C:

■Set the priority of Switch C to 8192.

■Enable rapid transition and digest snooping on Switch C.

Applicable Products

Product series	Software version	Hardware version
Switch 5500	Release V03.02.04	All versions
Switch 5500G	Release V03.02.04	All versions
Switch 4500	Release V03.03.00	All versions
Switch 4210	Release V03.01.00	All versions

Configuration Procedure

1Configuration on Switch B

# Enable MSTP.

<3Com> system-view

[3Com] stp enable

# Set the priority of Switch B to 4096.

[3Com] stp priority 4096

# Enable digest snooping on Switch B.

[3Com] stp config-digest-snooping

# Enable digest snooping on the root port Ethernet 1/0/1.