Bug#596667: debian-installer does not renew DHCP leases
On Mon, Sep 13, 2010 at 12:02:06PM +0200, Erik Auerswald wrote:
> On Mon, Sep 13, 2010 at 11:54:42AM +0200, Bastian Blank wrote:
> > On Mon, Sep 13, 2010 at 10:21:40AM +0200, Erik Auerswald wrote:
> > Which version? There where several different DHCP client implementations
> > in use over time.
> All those using the one-shot busybox udhcpc.
Please be more specific. There is no one-shot busybox udhcpc, except it
requested.
Proof:
| $ sudo ./busybox udhcpc -f -i eth0 -V d-i
| udhcpc (v1.17.1) started
| Sending discover...
| Sending select for 10.42.1.252...
| Lease of 10.42.1.252 obtained, lease time 10
| Sending renew...
| Sending renew...
| Sending renew...
| Lease lost, entering init state
| Sending discover...
| Sending select for 10.42.1.252...
| Lease of 10.42.1.252 obtained, lease time 10
The renew however seems to get lost somewhere, not sure why.
> > > The debian installer does not renew a DHCP lease after it has expired.
> > Possible. This means that the lease time is set to an insane low value.
> > You could downgrade to request not-expiring bootp leases.
> No.
Sure. The installer takes usually less then 30 minutes. So the lease
have to expire before that. So it is insanely low.
> > > network with dynamic ARP inspection[1] this results in loosing the network
> > > connection during installation.
> > So you have a infrastructure, that breaks existing things.
> No, d-i is broken by relying on the assumption that an IP address granted
> for time t1 is valid for a time t2 > t1.
Robustness principle. The dhcp spec explicitely requests that new
clients have to check for the ip to be free before using it.
Bastian
--
Hailing frequencies open, Captain.
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