DHCP server logging for IPv6

Chris Buxton chris.p.buxton at gmail.com
Thu Apr 21 03:31:32 UTC 2011

On Apr 20, 2011, at 3:08 PM, Jay Ford wrote:
> For example, the IPv4 logging for a new client looks something like:
>   DHCPDISCOVER from 00:11:22:33:44:55 via
>   DHCPOFFER on to 00:11:22:33:44:55 via
>   DHCPREQUEST for ( from 00:11:22:33:44:55 via
>   DHCPACK on to 00:11:22:33:44:55 via
> By contrast, the IPv6 logging is just:
>   Relay-forward message from 2001:db8:4:9::1 port 547, link address 2001:db8:4:2::1, peer address fe80::6972:f900:6038:8321
>   Picking pool address 2001:db8:4:2:ddde:a4b5:c6d7:e8f9
>   Sending Relay-reply to 2001:db8:4:9::1 port 547

There's no way to replicate the v4 format. The whole '(from|to) <MAC address>' is meaningless in DHCPv6, and the DORA exchange has been replaced by something very different.

DHCPv6 is an entirely different protocol than DHCP, that just happens to serve a similar purpose.

Chris Buxton
BlueCat Networks

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