User's Manual

Configuration Guide of XGS-5240-Series
37-11
Switch1(Config-if-Vlan3)#ipv6 address prefix-from-provider 0:0:0:1::1/64
Switch1(Config-if-Vlan3)#exit
Switch1(config)#ipv6 dhcp pool foo
Switch1(dhcpv6-foo-config)#dns-server 2001:4::1
Switch1(dhcpv6-foo-config)#domain-name www.ipv6.org
Switch1(dhcpv6-foo-config)#exit
Switch1(config)#interface vlan 3
Switch1(Config-if-Vlan3)#ipv6 dhcp server foo
Switch1(Config-if-Vlan3)#ipv6 nd other-config-flag
Switch1(Config-if-Vlan3)#no ipv6 nd suppress-ra
Switch1(Config-if-Vlan3)#exit
37.7 DHCPv6 Troubleshooting
If the DHCPv6 clients cannot obtain IPv6 addresses and other network parameters, the
following procedures can be followed when DHCPv6 client hardware and cables have been
verified ok:
 Verify the DHCPv6 server is running, start the related DHCP v6 server function if not
running;
 If the DHCPv6 clients and servers are not in the same physical network, verify the router
responsible for DHCPv6 packet forwarding has DHCPv6 relay function. If DHCPv6 relay
is not available for the intermediate router, it is recommended to replace the router or
upgrade its software to one that has a DHCPv6 relay function;
 Sometimes hosts are connected to the DHCPv6 enabled switches, but can not get IPv6
addresses. In this situation, it should be checked first whether the ports which the hosts
are connected to, are connected with the port which the DHCPv6 server is connected to.
If connected directly, it should be checked then whether the IPv6 address pool of the
VLAN which the port belongs to, is in the same subnet with the address pool configure in
the DHCPv6 server; If not connected directly, and any layer three DHCPv6 relay is
configured between the hosts and the DHCPv6 server, it should be checked first whether
an valid IPv6 address has been configured for the switch interface which the hosts are
connected to. If not configured, configure an valid IPv6 address. If configured, it should be
checked whether the configured IPv6 address is in the same subnet with the DHCPv6
server. If not, please add it to the address pool.