show ip protocols
//该命令查看ip路由协议配置和统计信息
R2#show ip protocols Routing Protocol is "rip" Sending updates every 30 seconds, next due in 10 seconds Invalid after 180 seconds, hold down 180, flushed after 240 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Redistributing: rip Default version control: send version 1, receive 1 Interface Send Recv Triggered RIP Key-chain Serial1/1 1 1 Serial1/2 1 1 Serial1/0 1 1 Automatic network summarization is in effect Maximum path: 4 Routing for Networks: 172.16.0.0 172.31.0.0 Passive Interface(s): Routing Information Sources: Gateway Distance Last Update 172.16.23.3 120 00:00:20 172.16.24.4 120 00:00:10 172.31.12.1 120 00:00:14 Distance: (default is 120)