3Com 5500G, 4210, 4200G manual Switch 8800 or Switch

84CHAPTER 14: MSTP CONFIGURATION GUIDE

Network Diagram Figure 24 Network diagram for RSTP configuration

			Switch A
		GE 2/0/1	GE 2/0/2
	Eth 1/0/1		Eth 1/0/5	Eth 1/0/6
Switch B		Eth 1/0/2			Switch C
		Eth 1/0/3	Eth 1/0/4
Eth 1/0/6		Eth 1/0/4	Eth 1/0/3		Eth 1/0/1
	Eth 1/0/5
				Eth 1/0/2
Eth 1/0/1					Eth 1/0/2
Eth 1/0/2		Eth 1/0/1	Eth 1/0/2		Eth 1/0/1
Switch D			Switch E		Switch F

Networking and

Configuration

Requirements

■Switch A is operating at the core.

■Switch B and Switch C are operating at the distribution layer.

■Switch D, Switch E, and Switch F are operating at the access layer.

At the distribution layer:

■Switch C is operating as the backup switch of Switch B. When Switch B fails, Switch C takes over.

■Switch C and Switch B are connected through two links. When a link fails, another link takes over.

At the access layer:

■Switch D, Switch E, and Switch F are directly connected to PCs.

■Switch D, Switch E, and Switch F are connected to Switch C and Switch B.

In the configuration procedure below, only RSTP-related configurations are provided. Switch A is the root bridge. Switch D through Switch F are mostly consistent in the configuration, so only the configuration on Switch D is listed.

n	■ In most cases, Switch A is a high-end switch or middle-range switch, such as
	Switch 8800 or Switch 7750.
	■ In most cases, Switch B and Switch C are stackable switches such as the Switch
	5500 and Switch 5500G.
	■ In most cases, Switch D, Switch E, and Switch F are stackable switches such as
	the Switch 4210 and the Switch 4200G.

Applicable Products

Product series	Software version	Hardware version
Switch 5500	Release V03.02.04	All versions
Switch 5500G	Release V03.02.04	All versions