Ever-changing ip address

[hinto]

I've done quite a few:

Code Select Expand


apt-get update && apt-get dist-upgrade


And each time I have to manually update my corporate dns server to a new ip address that siduction takes on.
Is there something in the process that tells the server to drop the lease on that address?

-Hinto

[michaa7]

I assume you don't mean dns server but dhcp server?

If so i'd say it depends on the configuration of the dhcp server (router?) whether or not it preserves ips for a given mac.

[hinto]

You are correct.
However, siduction is the only linux distro that requires a manual setup, that is an edit to the look up table.  It seems that there's something (ceni?) that causes the server to give up it's previous lease on the hostname/ip, since the hostname does not change.
-H

[michaa7]

I still do not understand your setup. Where is the dhcp server runnig. Is it a router (box) or a softwarerrouter on a siduction installation with dhcp?
In the later case maybe increasing the lease duration helps? See:
http://www.debianhelp.co.uk/dhcp.htm

[hinto]

That's down in the corporate bowels (and out of my control).  I don't think it's a problem with the lease, since I have another sid-based distro using dhcp with no problem.  That is, I can dist-updgrade till my heart's content without losing the lease on my ip address.  Is there something in siduction that re-generates a MAC address or anything.  It's odd that this is the only distro that does this.
-H

[michaa7]

ok, the picture becomes clearer.

What about comparing /etc/network/interfaces of both installations (siduction ond other sid-based installation, it *is* the same computer?). After all it's the only thing the remote dhcp server can see.

[hinto]

No, not the same PC.
PC 1 (SID):
/etc/network/interfaces

Code Select Expand


auto lo
iface lo inet loopback

PC 2 (siduction):
/etc/network/interfaces

Code Select Expand


auto lo
iface lo inet loopback

allow-hotplug eth0
iface eth0 inet dhcp


[michaa7]

But that is not the whole output.

Why not commenting the lower two lines and see what happens? Or why not copying /etc/network/interfaces from the upper to the lower installation, at least for testing. Why is "dhcp" not needed in the upper installation?

BTW: how are these two computers connected to the corporate servers? Two patchtcables? A switch? ?

[agaida]

Code Select Expand


allow-hotplug eth0
iface eth0 inet dhcp


should be

Code Select Expand


auto eth0
iface eth0 inet dhcp


iirc

[hinto]

^I'll give it a try.
It should be noted that I have not manually edited /etc/network/interfaces.
That was laid down by the installer (or auto generated).
-Hinto

[michaa7]

It was generated when you used ceni. There you have the opportunity to select "auto", "allow-hotplug" a.s.o.

[hinto]

^michaa7  That would allow for the difference, thanks.  For ceni, I just blindly selected the defaults, since everything seemed to work.  Thanks for solving the mystery
-Hinto