Automatic IPv6 due to broadcast
erey at ernw.de
Mon Apr 23 11:49:15 CDT 2012
On Mon, Apr 23, 2012 at 12:27:53PM -0400, Valdis.Kletnieks at vt.edu wrote:
> On Mon, 23 Apr 2012 11:23:14 -0400, Chuck Anderson said:
> > > On Mon, Apr 23, 2012 at 06:38:09AM -0700, Owen DeLong wrote:
> >> In a lot of cases, enforcing that all address assignments are via DHCP can still be
> >> counter-productive. Especially in IPv6.
> > If a specific managed environment provides DHCPv6 and doesn't provide
> > SLAAC, and the policies of said environment forbid static addressing,
> That's totally different from Owen's "in a lot of cases". Incidentally,
> there's absolutely nothing
except for LLT being the default DUID generation mechanism on pretty much every OS...
preventing a DHCPv* server from being configured to
> always hand out the same IP address to a given MAC address, making it
> effectively static (in fact, I've seen more than one site that carries nailed down
> DHCP entries for servers, just to ensure that even if the server gets borked and
> decides to DHCP itself, it will still come up with the "right" address anyhow).
> > how can enforcing the use of DHCPv6 be counter-productive?
> Remember, Owen was talking about "in a lot of cases". I suspect Owen was saying
> that if you enforce that all source addresses are ones that the DHCPv6 server
> handed out, you just broke a host that tries to do RFC4941 addresses or other
> similar things.
ERNW GmbH - Breslauer Str. 28 - 69124 Heidelberg - www.ernw.de
Tel. +49 6221 480390 - Fax 6221 419008 - Cell +49 174 3082474
PGP FP 055F B3F3 FE9D 71DD C0D5 444E C611 033E 3296 1CC1
Handelsregister Mannheim: HRB 337135
Geschaeftsfuehrer: Enno Rey
Blog: www.insinuator.net || Conference: www.troopers.de
More information about the NANOG