3Com Switch 8800 Configuration Guide Chapter 19 OSPF Configuration19-22By default, all interfaces are allowed to transmit and receive OSPF packets.After an OSPF interface is set to be in silent status, the interface can still advertise itsdirect route. However, the OSPF hello packets of the interface will be blocked, and noneighboring relationship can be established on the interface. Thereby, the capability forOSPF to adapt to the networking can be enhanced, which will hence reduce theconsumption of system resources. On a switch, this command can disable/enable thespecified VLAN interface to send OSPF packets.19.2.19 Configuring OSPF AuthenticationI. Configuring the OSPF Area to Support Packet AuthenticationAll the routers in one area must use the same authentication mode (no authentication,simple text authentication or MD5 cipher text authentication). If the mode of supportingauthentication is configured, all routers on the same segment must use the sameauthentication key. To configure a simple text authentication key, use theauthentication-mode simple command. Use the authentication-mode md5command to configure the MD5 cipher text authentication key if the area is configuredto support MD5 cipher text authentication mode.Perform the following configuration in OSPF area view.Table 19-25 Configure the OSPF area to support packet authenticationOperation CommandConfigure the area to support authenticationtypeauthentication-mode { simple |md5 }Cancel the configured authentication mode undo authentication-modeBy default, the area does not support packet authentication.II. Configuring OSPF packet authenticationOSPF supports simple authentication or MD5 authentication between neighboringrouters.Perform the following configuration in interface view.Table 19-26 Configure OSPF packet authenticationOperation CommandSpecify a password for OSPF simple textauthentication on the interfaceospf authentication-mode simplepasswordCancel simple authentication on theinterfaceundo ospf authentication-modesimpleSpecify the interface to use MD5authenticationospf authentication-mode md5key_id key
