Recommended IP pool module + IPv6 + stickiness

Vegard Svanberg vegard at
Wed Feb 3 15:18:24 CET 2021

* Bjørn Mork <bjorn at> [2021-02-03 14:30]:

> Do I need global IPv6 addresses on the link?  It's not required, so if
> you don't actually need it for anything then just don't bother
> allocating any.

That's a good question, which remains to be answered... ;-) Amongst
other things, a few in-band management issues have to be resolved. Might
need some sort of at least internally routable address on the
external-facing interface for a while. 

Luckily with v6 comes the freedom of multiple approaches...

> Should the prefix I assign to the customer's LAN (presumably by
> DHCPv6-PD) be dynamically allocated? People have different opinions
> here.  There isn't a right or wrong answer.  But the question should be
> asked, since the number of available addresses means that you *can*
> allocate a static prefix for every end user site.

Definitely. As v6 support is getting noticably better (bugs are squashed
and different brands of equipment are starting to agree on how to speak
to each other), I'm leaning towards making end-user prefixes as static
as possible. Up until not too long ago, some of our equipment even
refused to re-assign the same prefix ("error: already assigned"). One
bug down... ;-)

> Personally I hate renumbering, and can't understand why I should force
> that on innocent users :-)

I completely agree.

Vegard Svanberg <vegard at> [*Takapa at IRC (EFnet)]

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