viiConfiguring the user account format··························································································· 217Configuring MAC authentication timers ······················································································· 217About MAC authentication timers ························································································ 217Procedure ······················································································································ 217Enabling MAC authentication offline detection ·············································································· 218Setting the maximum number of concurrent MAC authentication users on a port ································· 218Enabling MAC authentication multi-VLAN mode on a port ······························································· 218Configuring MAC authentication delay ························································································ 219Configuring a MAC authentication guest VLAN ············································································· 219Restrictions and guidelines ································································································ 219Prerequisites ·················································································································· 220Procedure ······················································································································ 220Configuring a MAC authentication critical VLAN ··········································································· 220Restrictions and guidelines ································································································ 220Prerequisites ·················································································································· 221Procedure ······················································································································ 221Configuring the keep-online feature ··························································································· 221Including user IP addresses in MAC authentication requests ··························································· 222About the feature of including user IP addresses in MAC authentication requests ························· 222Restrictions and guidelines ································································································ 222Procedure ······················································································································ 222Display and maintenance commands for MAC authentication ·························································· 222MAC authentication configuration examples ················································································ 223Example: Configuring local MAC authentication ····································································· 223Example: Configuring RADIUS-based MAC authentication ······················································· 225Example: Configuring ACL assignment for MAC authentication ················································· 227Configuring PPP ·········································································· 230About PPP ··························································································································· 230PPP protocols················································································································· 230PPP link establishment process ·························································································· 230PPP authentication ·········································································································· 231PPP for IPv4 ·················································································································· 231PPP for IPv6 ·················································································································· 232Protocols and standards ·········································································································· 233PPP tasks at a glance ············································································································· 233Configuring a VT interface ······································································································· 233Configuring PPP authentication································································································· 234Configuring PAP authentication ·························································································· 234Configuring CHAP authentication (authenticator name is configured)·········································· 235Configuring CHAP authentication (authenticator name is not configured)····································· 236Configuring MS-CHAP or MS-CHAP-V2 authentication ··························································· 237Configuring the polling feature ·································································································· 238Enabling fast reply for keepalive packets ····················································································· 239Configuring PPP negotiation····································································································· 239Configuring the PPP negotiation timeout time ········································································ 239Configuring IP address negotiation on the client ····································································· 240Configuring IP address negotiation on the server ··································································· 240Enabling IP segment match ······························································································· 243Configuring DNS server IP address negotiation on the client ···················································· 244Configuring DNS server IP address negotiation on the server ··················································· 244Enabling PPP accounting ········································································································ 244Enabling logging for PPP users ································································································· 245Configuring service tracing objects ···························································································· 245Enabling PPP user blocking ····································································································· 246About PPP user blocking ·································································································· 246Procedure ······················································································································ 246Configuring the NAS-Port-Type attribute ····················································································· 246Suppressing adding PPP peer host routes to the local direct route table ············································ 247Configuring the traffic accounting frequency mode for online PPP users ············································ 247Display and maintenance commands for PPP ·············································································· 247
