[ifupdown] dhcp clients and zcip (zeroconf)

[Paul Fox]

 >  > In many situations, you may want the zcip configured address to be
 > 
 > > > maintained in addition to the dhcp configured one.
 > > >
 > 
 > This is exactly how we use it on our device as well.

doh.  sure wish i'd thought of this scheme a while ago.

 > > > Typically we do this:
 > > >
 > > > Run dhcpc on eth0.  If we get a leasefail, run zcip on eth0:1.  If we
 > > > eventaully get a dhcp address it is configured on eth0 and we have both
 > > > eth0 and eth0:1 (from zcip) configured.  New traffic is sent on the dhcp
 > > > configured interface, but we maintain the zcip configured one so that
 > > > existing connections are not dropped.

what's used as the source address for outbound traffic?  i'd guess the dhcp
address if it exists, else the eth0:1 address?  clearly you'd want to use
the routable dhcp address as often as possible.

 > Correct.  They are technically the same interface, but having the aliased
 > makes everything play well together.  In all actuality, having both on the
 > same interfaces didn't cause any problems for me except with the Samba
 > server on our device.  This seemed like a nice way to segment things though.

what was the samba problem?

paul
=---------------------
 paul fox, pgf at brightstareng.com