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3. Troubleshooting Functional Failures in Operation
77
Table 3-34: Retention of Route Information to Prefix Distribution Target
(Legend)
Y: Guaranteed
Y/N: Not guaranteed (each status information may be retained)
N: Not guaranteed (re-setting required because of initialization)
Note
Route management functions required when setting route information to prefix distribution target.
For other failures, see "3.9.1 Communication Is Disabled or Is Disconnected."
(a) Checking route information
When using the automatic route setting feature to the prefix distribution targets from the IPv6DHCP server, the route
information after prefix distribution can be checked using the show ipv6 route command with "-s" parameter
specified.
Figure 3-15: Check for Routing Information Using Operation Command
> show ipv6 route -s
Total: 10routes
Destination Next Hop Interface Metric Protocol Age
3ffe:1234:5678::/48 ::1 tokyo 0/0 Static 45m
<Active Gateway Dhcp>
3ffe:aaaa:1234::/48 ::1 osaka 0/0 Static 23m
<Active Gateway Dhcp>
:
>
(b) Reconfiguring route information
When using automatic route information setting feature of the IPv6DHCP server of this system to prefix distribution
target, if an event occurs that deletes route information due to a failure, etc., restoration requires the redistribution of
prefixes. Execute operations for the re-acquisition of prefix information by the client system.
(3) If DUID of this system conflicts with other system
If DUID conflicts in the configurations with 2 or more IPv6DHCP servers including this system in the same network,
reconfigure the DUID in this system according to the following procedure.
(a) Deleting the file containing DUID information
The DUID of this system is stored in /usr/var/dhcp6/dhcp6s_duid. Explicitly delete the file from the operation
command line using
rm.
(b) Reproducing the DUID
After deleting the DUID file, restart the server using the restart ipv6 dhcp server command or add an
IPv6DHCP server setting to the configuration information. The IPv6DHCP server acquires the MAC address of the
IPv6 interface used as IPv6DHCP server interface when restarted and generates new DUID based on that information
and time information.
Retention Information
Concerning Prefix
Event and Retention
Server Function Restart Routing Manager Restart This System Restart
Command
Execution
Server
Failure
Route information to client Y Y/N Y N