SNR S2989G-24TX-POE — настройка функций обнаружения петель в сетевых устройствах [74/553]

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2-10

S2989G-24TX Operation Manual Chapter 2 Layer 2 services

Configuration

Global Mode

loopback-detection control-recovery

timeout <0-3600>

Configure the loopback-detection control

mode (automatic recovery enabled or

not) or recovery time.

2.3.3

Port Loopback Detection Function Example

SWITCH

Network Topology

Figure 2-3 Typical example of port loopback detection

As shown in the above configuration, the switch will detect the existence of loopbacks

in the network topology. After enabling the function of loopback detection on the port

connecting the switch with the outside network, the switch will notify the connected

network about the existence of a loopback, and control the port on the switch to guarantee

the normal operation of the whole network.

The configuration task sequence of SWITCH:

Switch(config)#loopback-detection interval-time 35 15

Switch(config)#interface ethernet 1/0/1

Switch(Config-If-Ethernet1/0/1)#loopback-detection special-vlan 1-3

Switch(Config-If-Ethernet1/0/1)#loopback-detection control block

If adopting the control method of block, MSTP should be globally enabled. And the

corresponding relation between the spanning tree instance and the VLAN should be

configured.

Switch(config)#spanning-tree

Switch(config)#spanning-tree mst configuration

Switch(Config-Mstp-Region)#instance 1 vlan 1

Switch(Config-Mstp-Region)#instance 2 vlan 2