3Com 4200G, 5500G, 4210 manual Auto Detect Configuration Guide, Static Routing

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AUTO DETECT CONFIGURATION GUIDE

Auto Detect	You can bind a static route with a detected group. The auto detect function will
Implementation in	then detect the reachability of the static route through the path specified in the
Static Routing	detected group.
	■ The static route is valid if the detected group is reachable.
	■ The static route is invalid if the detected group is unreachable.
Network Diagram	Figure 19 Network diagram of applying auto detect to static routing
				Vlan- int3		Vlan-int2
			192.168.1.2 /24 Switch B 10.1.1 .3/24
		Vlan-int3					Vlan-int2
		192.168.1.1/24					10 .1.1.4/24
		Vlan- int1			Vlan-int2	Vlan- int1		Vlan -int3
	Host A	192.168.2.2 /24			192 .168.3.1/24	10.1.2.1 /24	10.1.3.2/24		Host C
		Switch A					Switch C
	192.168.2.1/24								10.1.3.1/24
				Vlan- int2		Vlan-int1
			192.168.3.2 /24			10.1.2 .2/24

Switch D

Networking and

Configuration

Requirements

■Make sure there is a route between Switch A and Switch B, Switch B and Switch C, Switch A and Switch D, and Switch D and Switch C.

■On Switch A, configure two static routes to Host C with different preferences. The one with higher preference (smaller value) is used as the master route, and the other as the backup route.

■Normally, Switch A adopts the master route to send data to Host C through Switch B.

■Create detected group 8 on Switch A; detect the reachability of IP address 10.1.1.4/24, with the next hop being 192.168.1.2, and the detecting number being 1.

■If the detected group 8 is reachable, the master route is valid, and Switch A adopts the master route to send data to Host C through Switch B.

■If the detected group is unreachable, the master route is invalid, and Switch A adopts the backup route to send data to Host C through Switch D.

■Similarly, configure two static routes to Host A on Switch C. Normally, Switch C sends data to Host A through Switch B.