Operation Manual – Routing ProtocolH3C S7500 Series Ethernet Switches Chapter 5 IS-IS Configuration5-17Note:If you do not provide the level-1 keyword or the level-2 keyword, this commandapplies to Level-1 and Level-2.5.3.16 Configuring AuthenticationI. Configuring authentication on an interfaceThe authentication configured on the interface applies to the Hello packet in order toauthenticate neighbors. All interfaces must share the same authentication passwordin the same level within a network.Follow these steps to configure authentication:To do... Use the command... RemarksEnter system view system-view —Enter interface view interface interface-typeinterface-number —Configure the IS-ISauthentication mode andpasswordisis authentication-mode{ simple | md5 } password[ { level-1 | level-2 } [ ip | osi ] ]RequiredBy default, noauthentication isconfigured.II. Configuring authentication for an IS-IS area or routing domainYou can configure an authentication password for an IS-IS area or routing domain.If area authentication is required, the area authentication password is encapsulated inthe LSP, CSNP, and PSNP packets at Level-1 as predefined. If area authentication isalso enabled on other routers in the same area, area authentication works normallyonly if the authentication mode and password of these routers are the same as thoseof the neighboring routers.Likewise, if domain authentication is required, the domain authentication password isalso encapsulated in the LSP, CSNP, and PSNP packets at Level-2 as predefined. Ifdomain authentication is also required on other routers at the backbone layer(Level-2), the authentication works normally only if the authentication mode andpassword of these routers are the same as those of the neighboring routers.Follow these steps to configure authentication:To do... Use the command... RemarksEnter system view system-view —Enter IS-IS view isis [ tag ] —
