3Com 5500G-EI Command Reference Guide - Page 159

RIP Configuration Commands 159 Use the following precautions when configuring a static route: ■ You cannot specify an interface address of the local Switch as the next hop address of an static route. ■ When the destination IP address and subnet mask are both set to 0.0.0.0, this is the configured default route. A packet is forwarded using the default route as a last resort if no better routing match is found in the routing table. ■ As an alternative way to configure preference level, a flexible routing protocol can be adopted. Related command: display ip routing-table, delete static-routes all. Example To configure the next hop of the default route as 129.102.0.2, enter the following: system-view System View: return to User View with Ctrl+Z. [SW5500]ip route-static 0.0.0.0 0.0.0.0 129.102.0.2 RIP Configuration Commands This section describes the commands you can use to configure the Routing Information Protocol (RIP). When the Switch 5500G-EI runs a routing protocol, it is able to perform the functions of a router. The term router in this section can refer either to a physical router or to the Switch 5500G-EI running a routing protocol. checkzero Syntax checkzero undo checkzero View RIP view Parameter None Description Use the checkzero command to check the zero field of RIP-1 packets. By default, RIP-1 performs zero field checking. Use the undo checkzero command to disable the checking of the zero fields. According to the RFC1058 protocol specifications, some fields in RIP-1 packets must be set to zero. These are called zero fields. During the zero check operation, if a RIP-1 packet is received in which the zero fields are not zeros, it will be rejected. Use the checkzero command to enable or disable the zero check operation on RIP-1. This command does not work with RIP-2 packets, since RIP-2 packets have no zero fields.