NEC IP8800/S3600 Manuale Utente

Troubleshooting Functional Failures in Operation

Figure 3-14: IPv6DHCP Server Failure Analysis Procedure

(a) Checking the log and interface

Communication may be interrupted by NIM or interface failure (or damage) or failure in the neighboring system.
Check the log displayed by this system and the up/down status of interfaces using the show inpv6 interface
command. For the procedure, see "

3.9.1 Communication Is Disabled or Is Disconnected

(b) Checking the status of the IPv6 DHCP server in this system

1. Checking if the IPv6DHCP server service is running

Confirm that information can be retrieved from the IPv6DHCP server daemon using the show ipv6 dhcp
server
statistics command. If the show ipv6 dhcp server statistics command produces the following
output, reset
IPv6DHCP server using configuration command service ipv6 dhcp.

[Execution results]
> show ipv6 dhcp server statistics

> < show statistics >: dhcp6_server doesn't seem to be running.

2. Checking the remaining distributable prefixes

Verify the operation log using the show logging command.

No physical failure message exists.

A physical failure message exists.

Check the Up/Down status of the interface using the

show ipv6 interface command.

see the manuals "Message Log Reference" and

3.9.1 Communication Is Disabled or Is Disconnected

and perform the actions described in [Action] associated

with each log message.

Check the status of IPv6DHCP server.

Go to "

3.4 Network Interface Communication Failure

The settings of this system

are correct.

The settings of this system

are incorrect.

Check if the prefix has been distributed

redundantly using the show ipv6 dhcp binding

command.

Follow the configuration procedure described in this

chapter.

Not redundantly distributed.

Redundantly distributed.

Verify if the status and the settings of client.

Follow the procedure for restoring from duplicate

distribution described in this chapter.