7 dhcpv6 troubleshooting, Dhcp, Roubleshooting – PLANET XGS3-24042 User Manual

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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

30.7 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.

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