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ccna certification sign up.R l(config)#router rip Start the RIP routing processR1 (config-router)#version 2Configure RIP version 2 to determine the version information of RIP routing updates that can be received and sent under the interfaceR1 (config-router)#network 172.16.0.0 Configure the range of interfaces participating in the RIPv2 routing protocol so that they can send and receive RIPv2 update information/The network command works as follows: RIP is enabled on all interfaces belonging to the specified primary class network, and the relevant interfaces will start sending and receiving RIP update information. The router notifies all IP networks on the interface running the RIP protocol. When using the network command, if it is followed by subnet information, such as 172.16.1.0, IOS will correct the configuration to a classed network configuration 172.16.0.0, which can be viewed with the show running-config command. If the interface address is a CIDR address, such as 192.168.0.1/16, configured with the command network 192.168.0.0, other routers can receive CIDR routes, proving that in RIPv2 is possible to publish CIDR routes.R1(config-router)#noauto-summary Disable the route auto-summary function, the auto-summary function is on by default, in order to avoid the problem that discontinuous subnets cannot communicate, it is recommended to disable the auto-summary functionR1 (config-router)#passive-interface gigabitEthernet 0/1 Rl(config-router)#passive-iiiterface gigabitEthernet 0/2 Configure the passive interface R1 (config-router )#exitMultiple [Technical Point] Sending unnecessary routing updates to the LAN can affect the network in the following 3 ways: bandwidth is wasted on transmitting unnecessary routing updates because the switch will forward RIPv2 updates to all ports. All devices on the LAN must process routing update information until the receiving device drops the update information after the transport layer. Announcing routing update information on a broadcast network poses serious risks o RIPv2 update information can be intercepted midway by packet sniffing software. The routing update information may be modified and resent back to that router, causing the routing table to forward traffic based on incorrect routing information. Alternatively, to avoid an Ethernet interface running RIPv2 from sending unnecessary routing update information to the LAN/s, you can set the interface as a passive interface. For the RIP protocol, the passive interface can only receive routing update information and cannot send routing update information as broadcast or multicast, but it can send update information as unicast. the command to configure the unicast update method is as follows.R1 (config-router)#neighbor A.B.C.D