Dhcpv6 Troubleshooting - Planet XGS3-42000R User Manual

29.7 DHCPv6 Troubleshooting

If the DHCP v6 clients cannot obtain IP v6 addresses and other network parameters, the following procedures
can be followed when DHCP v6 client hardware and cables have been verified ok:
 Verify the DHCP v6 server is running, start the related DHCP v6 server function if not running;
 If the DHCP v6 clients and servers are not in the same physical network, verify the router responsible
for DHCP v6 packet forwarding has DHCP v6 relay function. If DHCP v6 relay is not available for the
intermediate router, it is recommended to replace the router or upgrade its software to one that has a
DHCP v6 relay function;
 Sometimes hosts are connected to the DHCP v6 enabled switches, but can not get IP v6 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 DHCP v6 server is connected to. If connected directly, it should be
checked then whether the IP v6 address pool of the VLA N which the port belongs to, is in the same
subnet with the address pool configure in the DHCP v6 server; If not connected directly, and any layer
three DHCP v6 relay is configured between the hosts and the DHCP v6 server, it should be checked first
whet her an valid IP v6 address has been configured for the switch interface which the hosts are
connected to. If not configured, configure an valid IP v6 address. If configured, it should be checked
whet her the configured IP v6 address is in the same subnet with the DHCP v6 server. If not, pleas e add
it to the address pool.
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