182• Configure network parameters in a DHCPv6 option group, and specify the option group for aDHCPv6 address pool.Network parameters configured in a DHCPv6 address pool take precedence over those configuredin a DHCPv6 option group.Configuring network parameters in a DHCPv6 address poolStep Command Remarks1. Enter system view. system-view N/A2. Create a DHCPv6 addresspool and enter its view. ipv6 dhcp pool pool-name By default, no DHCPv6address pools exist.3. Specify an IPv6 subnet fordynamic assignment.network { prefix/prefix-length | prefixprefix-number[ sub-prefix/sub-prefix-length ] }[ preferred-lifetime preferred-lifetimevalid-lifetime valid-lifetime ]By default, no IPv6 subnet isspecified.The IPv6 subnets cannot bethe same in different addresspools.If you specify an IPv6 prefixby its ID, make sure the IPv6prefix is in effect. Otherwise,the configuration does nottake effect.4. Specify a DNS serveraddress. dns-server ipv6-address By default, no DNS serveraddress is specified.5. Specify a domain name. domain-name domain-name By default, no domain nameis specified.6. Specify an AFTR domainname. aftr-name aftr-name By default, no AFTR domainname is specified.7. Specify a SIP server addressor domain name.sip-server { address ipv6-address |domain-name domain-name }By default, no SIP serveraddress or domain name isspecified.8. Configure a self-definedDHCPv6 option. option code hex hex-stringBy default, no self-definedDHCPv6 option isconfigured.Configuring network parameters in a DHCPv6 option groupYou can create a static DHCPv6 option group by using the ipv6 dhcp option-group command.To create a static DHCPv6 option group:Step Command Remarks1. Enter system view. system-view N/A2. Create a static DHCPv6option group and enter itsview.ipv6 dhcp option-groupoption-group-numberBy default, no static DHCPv6option groups exist.3. Specify a DNS serveraddress. dns-server ipv6-address By default, no DNS serveraddress is specified.4. Specify a domain namesuffix. domain-name domain-name By default, no domain namesuffix is specified.