Troubleshooting guide

3. Troubleshooting Functional Failures During Operation

Destination Next Hop Interface Metric Protocol Age

3ffe:1234:5678::/48 ::1 tokyo 0/0 Static 45m

3ffe:aaaa:1234::/48 ::1 osaka 0/0 Static 23m

(b) Setting the routing information again

Consider the case where the automatic route setting functionality is used for distributing prefixes

from the IPv6 DHCP server on the Switch to assignment targets. In this case, if an event has cleared

the routing information due to a failure, the prefixes must be distributed again. Perform necessary

operations to obtain the prefix information again on the clients.

(3) The DUID is duplicated between the Switch and another device

In a network where multiple IPv6 DHCP servers including the Switch are operated, if the DUID is

duplicated between the Switch and another server, use the following procedure to set the DUID of

the Switch again.

(a) Deleting the file that contains the DUID information

The DUID of the Switch is saved in

/usr/var/dhcp6/dhcp6s_duid. Use the rm command on the

operation command line to explicitly delete the file.

(b) Regenerating the DUID

After the DUID file is deleted, use the

restart ipv6-dhcp server command to restart the server

or add the IPv6 DHCP server setting in the configuration. At startup, the IPv6 DHCP server on the

Switch obtains the MAC address of the IPv6 interface that is used as the IPv6 DHCP server

interface. Then, the IPv6 DHCP server regenerates the DUID based on the obtained MAC address

and time information.

To check the DUID, execute the

show ipv6 dhcp server statistics command. The DUID is

displayed for

< Server DUID >. For details, see the Configuration Guide.