3Com Switch 8800 Configuration Guide Chapter 18 RIP Configuration18-4Table 18-2 Enable RIP InterfaceOperation CommandEnable RIP on the specified network network network-addressDisable RIP on the specified network undo network network-addressNote that after the RIP task is enabled, you should also specify its operating networksegment, for RIP only operates on the interface on the specified network segment. Foran interface that is not on the specified network segment, RIP does not receive or sendroutes on it, nor forwards its interface route, as if this interface does not exist at all.network-address is the address of the enabled or disabled network, and it can also beconfigured as the IP network address of respective interfaces.When a command network is used for an address, you can enable the networkaddress of the port, which also includes the subnet addresses. For example, fornetwork 129.102.1.1, you can see network 129.102.0.0 either using displaycurrent-configuration or using display rip command.By default, RIP is disabled on all the interfaces after it is started up.18.2.3 Configuring Unicast of the PacketsUsually, RIP sends packets using broadcast or multicast addresses. It exchangesrouting information with non-broadcasting networks in unicast mode.Perform the following configuration in RIP view.Table 18-3 Configure unicast of the packetsOperation CommandConfigure unicast of the packets peer ip-addressCancel unicast of the packets undo peer ip-addressBy default, RIP does not send any packets to any unicast addresses.It should be noted that peer should also be restricted by rip work, rip output, rip inputand network.18.2.4 Configuring Split HorizonSplit horizon means that the route received via an interface will not be sent via thisinterface again. To some extent, the split horizon is necessary for reducing routing loop.But in some special cases, split horizon must be disabled so as to ensure the correctadvertisement of the routes at the cost of efficiency. For example, split horizon isdisabled on a NBMA network if it runs RIP.Perform the following configuration in interface view.
