159To do… Use the command... RemarksEnter interface view interface interface-typeinterface-number —Configure a DIS name isis dis-name symbolic-nameOptionalNot configured by default.This command takes effect only on arouter with dynamic system ID to hostname mapping configured.This command is not supported on P2Pinterfaces.Enabling the logging of neighbor state changesFollow these steps to enable the logging of neighbor state changes:To do… Use the command… RemarksEnter system view system-view —Enter IS-IS view isis [ process-id ] [ vpn-instancevpn-instance-name ] —Enable the logging of neighborstate changes log-peer-change RequiredEnabled by defaultNOTE:With this feature enabled, the router delivers information about neighbor state changes to the terminal fordisplay.Enhancing IS-IS network securityTo enhance the security of an IS-IS network, you can configure IS-IS authentication. IS-IS authenticationinvolves neighbor relationship authentication, area authentication and routing domain authentication.Configuration prerequisitesBefore enhancing IS-IS network security, complete the following tasks:• Configure network layer addresses for interfaces to make neighboring nodes accessible to eachother at the network layer.• Enable IS-ISConfiguring neighbor relationship authenticationWith neighbor relationship authentication configured, an interface adds the password in the specifiedmode into hello packets to the peer and checks the password in the received hello packets. If theauthentication succeeds, it forms the neighbor relationship with the peer.The authentication mode and password at both ends must be identical.Follow these steps to configure neighbor relationship authentication:
