SNR S2989G-24TX-POE — настройка маршрутизации и протоколов для сетевых устройств [248/553]

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S2989G-24TX Operation Manual

Chapter 4 Routing Protocol Related Configuration

4-23

Switch B:

Switch#config

Switch(config)#bfd mode passive

Switch(config)#interface vlan 100

Switch(config-if-vlan100)#ip address 10.1.1.2 255.255.255.0

Switch(config)#interface vlan 300

Switch(config-if-vlan300)#ip address 30.1.1.1 255.255.255.0

Switch(config)#router rip

Switch (config-router)#network vlan 100

Switch (config-router)#network vlan 300

Switch(config)#interface vlan 100

Switch(config-if-vlan100) #rip bfd enable

When the link between Switch A and Switch B is failing, BFD can detect it immediately and

notifies RIP to delete the learnt route.

4.5.3.3 Example for Linkage of BFD and VRRP

Example:

When the master is failing, the backup cannot become the master until the configured

timeout timer expires. The timeout is generally three to four seconds and therefore the

switchover is slow. To solve this problem, VRRP uses BFD to probe the state of the

master. Once the master fails, the backup can become the new master within 100 ms.