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DES-7200 Configuration Guide Chapter 2 RIP
Configuration
2-3
Note
In FR or X.25 environment, if the broadcast keyword is specified for address
mapping, the neighbor command is not necessary, which is mainly used for
reducing broadcast packets and filtering routes.
2.2.3 Configuring Split Horizon
Split horizon can be used to avoid loop in the environment where multiple devices
running distance-vectortype routing protocols connect to a network in which IP
packets are broadcasted. Split horizon can prevent the router from advertising
some route information through the port from which it learns such information.
This optimizes the route information exchange among multiple routers.
However, split horizon may cause the failure of some routers to learn all the
routes in a non-broadcast multi-access network (for example, frame relay, X.25).
In this case, you may need to disable split horizon. If a port is configured with the
secondary IP address, you also need to pay attention to the split horizon problem.
To enable or disable split horizon, execute the following commands in the
interface configuration mode:
Command Function
DES-7200(config-if)# no ip split-horizon
Disable split horizon.
DES-7200(config-if)# ip split-horizon
Enable split horizon.
By default, split horizon is enabled on all interfaces.
2.2.4 Defining the RIP Version
DES-7200 product supports RIP version 1 and version 2, where RIPv2 supports
authentication, key management, route convergence, CIDR and VLSMs. For the
information about the key management and VLSMs, see the IP Routing Protocol
Independent Feature Configuration chapter.
By default, DES-7200 product can receive RIPv1 and RIPv2 packets, but it can
only send RIPv1 packets. You can configure it to receive and send only RIPv1
packets or RIPv2 packets.
To receive and send the packets of a specific version, execute the following
commands in the routing process configuration mode:
Command Function
DES-7200(config-router)# version {1 | 2}
Defining the RIP Version.
The above command allows the software to receive or send only the packets of
the specified version. If needed, you can modify the default setting of every port.