37、静默路由
拓扑如下：
AR1的路由器G0/0/0连接的pc，pc并不会发送hello报文，更不会建立邻居关系，可以将端口配置为默认路由，由于端口不收发hello包，从而节省设备的性能。
AR1、AR3 配置静默接口
[AR1]ospf 1 router-id 1.1.1.1
[AR1-ospf-1]sil
[AR1-ospf-1]silent-interface G0/0/1
[AR1-ospf-1]quit
[AR1]quit
<AR1>save
The current configuration will be written to the device.
Are you sure to continue? (y/n)[n]:y
It will take several minutes to save configuration file, please wait.......
Configuration file had been saved successfully
Note: The configuration file will take effect after being activated
<AR1>[AR3]ospf 1 router-id 3.3.3.3
[AR3-ospf-1]sil
[AR3-ospf-1]silent-interface G0/0/1
[AR3-ospf-1]quit
[AR3]quit
<AR3>save
The current configuration will be written to the device.
Are you sure to continue? (y/n)[n]:y
It will take several minutes to save configuration file, please wait.......
Configuration file had been saved successfully
Note: The configuration file will take effect after being activated
<AR3>