试题详情

四台路由器R1、R2、R3和R4顺序相连，R1和R4上创建Loopback0接口，接口地址分别为1.1.1.1和4.4.4.4，四台设备分别配置动态路由协议，保证R1和R4的Loopback0地址路由可达，R1和R4间建立GRE Tunnel，查看R1上Tunnel接口信息如下： [R1]display interface Tunnel 0 Tunnel0 current state:UP Line protocol current state:UP Description:Tunnel0 Interface The Maximum Transmit Unit is 1476 Internet Address is 10.0.0.1/30 Primar Encapsulation is TUNNEL,aggregation ID not set Tunnel source 1.1.1.1,destination 4.4.4.4 Tunnel keepalive disable Tunnel protocol/transport GRE/IP GRE ke disabled Checksumming of GRE packets disabled Last 300 seconds input: 2 btes/sec,0 packets/sec Last 300 seconds output: 2 btes/sec,0 packets/sec 15 packets input,840 btes 0 input error 27 packets output,1248 btes 0 output error 此时，若中断R2和R3之间链路，则下列说法正确的是(____)。