[jimsmith]

If we utilize a DHCPv3 server to hand out /64 IPv6 addresses, (we want to monitor and log workstation activity), but someone statically assigns their own valid IPv6 address to their workstation(s), it could take forever to discover these unassigned but valid v6 addresses. To discover which workstation(s) are not using the DHCPv3 server, would it be better to ping the multicast address of FF02::1 and compare the ping responses to what the DHCpv3 server reported as giving out to valid requestors or should some other method be used?

Looking for other ideas to discover these rouge workstations.
Thanks
JimSmith

[ScottGem]

There are other people here who may be able to suggest a way of finding those workstations.

But frankly I think there is a different, non-technical solution. Send a memo to all employees. Something like this:

It is company policy to assign IP addresses to workstations using our DHCP server. It has come to our attention that some users have taken it upon themselves to change their workstations to use a static IP rather then accept the one from the server.

Since this is against company policy we are expect anyone who has done this to change their workstation back. We are currently looking for ways to track these workstations. If anyone continues to use a static IP, disciplinary action will be taken against them.

I think this is more a human resources issue than a technical one.

[KISS]

For IPV4, you can ping the multicast address and then look at the arp table, so it would probably work for IPv6.

[jimsmith]

There are other people here who may be able to suggest a way of finding those workstations.

But frankly I think there is a different, non-technical solution. Send a memo to all employees. Something like this:

It is company policy to assign IP addresses to workstations using our DHCP server. It has come to our attention that some users have taken it upon themselves to change their workstations to use a static IP rather then accept the one from the server.

Since this is against company policy we are expect anyone who has done this to change their workstation back. We are currently looking for ways to track these workstations. If anyone continues to use a static IP, disciplinary action will be taken against them.

I think this is more a human resources issue than a technical one.

I guess your suggestion would work in a very small "mom & pop” shop but imagine asking a hostile environment to follow your message. What do you think folks would do??

[ScottGem]

Sorry but you are wrong. I've worked mostly for very large companies with thousands of work stations. Every new employee in my current company (over 2500 computers) signs an Internet usage policy statement. We've never had an issue with people hardcoding IPs.