3Com Switch 8800 Configuration Guide Chapter 18 RIP Configuration18-11Operation CommandEnable the interface to send RIP update packet rip outputDisable the interface to send RIP update packet undo rip outputThe undo rip work command and the undo network command have similar but not allthe same functions. Neither of the two commands configures an interface to receive orsend RIP route. The difference also exists. RIP still advertises the routes of theinterface applying the undo rip work command. However, other interfaces will notforward the routes of the interface applying the undo network command. It seems thatthe interface is removed.In addition, rip work is functionally equivalent to both rip input and rip outputcommands.By default, all interfaces except loopback interfaces both receive and transmit RIPupdate packets.18.2.15 Setting RIP-2 Packet AuthenticationRIP-1 does not support packet authentication. But when the interface operates RIP-2,the packet authentication can be configured.RIP-2 supports two authentication modes: Simple authentication and MD5authentication. MD5 authentication uses two packet formats: One follows RFC1723and the other follows the RFC2082.The simple authentication does not ensure security. The authentication key notencrypted is sent together with the packet, so the simple authentication cannot beapplied to the case with high security requirements.Perform the following configuration in Interface view:Table 18-16 Set RIP-2 packet authenticationOperation CommandConfigure RIP-2 simple authenticationkeyrip authentication-mode simplepassword-stringPerform usual MD5 authentication onRIP-2 packetsrip authentication-mode md5 usualkey-stringPerform nonstandard-compatible MD5authentication on RIP-2 packetsrip authentication-mode md5nonstandard key-string key-idDisable RIP-2 packet authentication undo rip authentication-modeBefore configuring MD5 authentication, you must configure MD5 type. The usualpacket format follows RFC1723 and the nonstandard follows RFC2082.
