20.7.1 Address Pool Configuration Example ........................................................20-12
20.7.2 Manual Binding Configuration ....................................................................20-13
20.7.3 DHCP Client Configuration ........................................................................20-13
21 DHCP Relay Configuration ............................................................................................................... 21-1
21.1 Overview ..................................................................................................................................21-1
21.1.1 Understanding DHCP ..................................................................................21-1
21.1.2 Understanding DHCP Relay Agent ..............................................................21-1
21.1.3 Understanding DHCP Relay Agent Information(option 82) ..........................21-2
21.1.4 Understanding DHCP relay Check Server-id Function ................................21-3
21.2 Configuring DHCP ...................................................................................................................21-3
21.2.1 Configuring DHCP Relay Agent ...................................................................21-3
21.2.2 Configuring the DHCP Server IP Address ...................................................21-4
21.2.3 Configuring DHCP option dot1x ...................................................................21-4
21.2.4 Configuring DHCP option dot1x access-group ............................................21-5
21.2.5 Configuring DHCP option 82 ........................................................................21-6
21.2.6 Configuring DHCP relay check server-id .....................................................21-6
21.2.7 Configuring DHCP relay suppression ..........................................................21-7
21.2.8 DHCP Configuration Example .....................................................................21-7
21.3 Other Precautions on DHCP Relay Configuration ...................................................................21-7
21.3.1 Precautions on DHCP option dot1x Configuration .......................................21-8
21.3.2 Precautions on DHCP option82 Configuration ............................................21-8
21.4 Showing DHCP Configuration .................................................................................................21-8
22 DNS Configuration ............................................................................................................................ 22-1
22.1 DNS Overview .........................................................................................................................22-1
22.2 Configuring Domain Name Resolution ....................................................................................22-1
22.2.1 Default Configuration of DNS.......................................................................22-1
22.2.2 Enabling DNS Resolution Service ...............................................................22-2
22.2.3 Configuring DNS Server ..............................................................................22-2
22.2.4 Configuring Mapping between Host Name and IP Address Statically .........22-2
22.2.5 Clearing Cache Table of Dynamic Host Names ...........................................22-3
22.2.6 Showing Domain Name Resolution Information ..........................................22-3
22.2.7 Application examples ...................................................................................22-3
23 NTP Configuration ............................................................................................................................. 23-1
23.1 Unerstanding NTP ...................................................................................................................23-1
23.2 Configuring NTP ......................................................................................................................23-1
23.2.1 Configuring Global Security Authentication Mechanism for the NTP ..........23-2
23.2.2 Configuring Global Authentication Key for the NTP .....................................23-2
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