AW: dhcpd -6 dont start

[Kari, Vitali]

I added 

subnet6 fe80::/64 {
}
to my config and it starts now with sample config:

/sbin/dhcpd -6 -d -cf /etc/dhcpd6.conf-test eth2

Internet Systems Consortium DHCP Server 4.3.4b1
Copyright 2004-2016 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Config file: /etc/dhcpd6.conf-test
Database file: /var/db/dhcpd6.leases
PID file: /var/run/dhcpd6.pid
Wrote 0 NA, 0 TA, 0 PD leases to lease file.
Multiple interfaces match the same subnet: eth0 eth2
Multiple interfaces match the same shared network: eth0 eth2
Multiple interfaces match the same subnet: eth0 eth1
Multiple interfaces match the same shared network: eth0 eth1
Bound to *:547
Listening on Socket/5/eth2/fe80::/64
Sending on   Socket/5/eth2/fe80::/64
Server starting service.

But I am a little cunfused why I need a subnet6 for Link-Local interface to bring the daemon up. The fe80::/64 will fit to all Link-Local interfaces, so I get a warning about multiple interface matching even if I start the daemon with eth2.


My test config is now:
--------------
option dhcp6.name-servers 2001:4860:4860::8888, 2001:4860:4860::8844;
subnet6 2a03:4920:100::/44 {
    prefix6 2a03:4920:100:100:: 2a03:4920:10f:ff00:: /56;
}

subnet6 fe80::/64 {
}
------------

Best regards
Mit freundlichen Grüßen

Vitali Kari 
Teamleiter NGN

-----Ursprüngliche Nachricht-----
Von: dhcp-users-bounces at lists.isc.org [mailto:dhcp-users-bounces at lists.isc.org] Im Auftrag von Chuck Anderson
Gesendet: Montag, 4. April 2016 18:43
An: dhcp-users at lists.isc.org
Betreff: Re: dhcpd -6 dont start

On Mon, Apr 04, 2016 at 05:12:35PM +0100, Simon Hobson wrote:
> Alan Buxey <A.L.M.Buxey at lboro.ac.uk> wrote:
> 
> > define a subnet6 statement for the eth2 address space but dont put any ranges/stuff into it.
> 
> Or configure the server to only listen on interfaces you want to serve.

> > > No subnet6 declaration for eth2 (fe80::250:56ff:fea3:217d).

Is it really necessary to define a subnet6 for the Link-Local subnet on all interfaces?  If so, this should work (I haven't tried):

subnet6 fe80::/64 {
}

> > > /etc/dhcpd6.conf: interface name too long (is 16)

That is interesting.  What interfaces do you have? (ifconfig -a) _______________________________________________
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