MAC vs DUID issue

Simon Hobson dhcp1 at
Wed Apr 2 21:06:50 UTC 2014

Ted Lemon <ted.lemon at> wrote:

>> I can give an IPv4 real life example - thousands of DHCP clients (DSL
>> modems) with *all* of them sending the same client id. I needed to
>> explicitly patch ISC DHCP to ignore the client id in order to make
>> this work.
> This doesn't sound like a DHCPv6 bug.

It isn't - it was given as an example of why, for some use cases, the MAC is a far superior identifier than some arbitrary identifier made-up by the client (and so not guaranteed to be invariable and unique).

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