#851503 dhcprelay stops working for bridge-interfaces

Package:
isc-dhcp-relay
Source:
isc-dhcp
Description:
ISC DHCP relay daemon
Submitter:
Wolfgang Walter
Date:
2026-08-05 17:34:06 UTC
Severity:
important
Tags:
#851503#5
Date:
2017-01-15 17:23:37 UTC
From:
To:
Package: isc-dhcp-relay
Version: 4.3.5-3
Severity: important

After upgrading from 4.3.5-1 to 4.3.5-3 relaying bridge interfaces seem not to work any more:

I have three interfaces A, B, C part of a bridge X.

In /etc/default/isc-dhcp-relay I set

	INTERFACES="X"

After upgrading I get the following errors if a device connected via A makes an dhcp-reqest:

Jan 15 17:38:02 wuschel dhcrelay[1573]: Discarding packet received on A interface that has no IPv4 address assigned.
Jan 15 17:38:02 wuschel dhcrelay[1573]: Discarding packet received on B interface that has no IPv4 address assigned.
Jan 15 17:38:02 wuschel dhcrelay[1573]: Discarding packet received on C interface that has no IPv4 address assigned.

As these interfaces are bridge ports they don't have an IP-address. X has one but dhcprelay seems not consider X any more. Instead it considers B and C where the packet has not been received from.

Downgrading to 4.3.5-1 fixes the problem.

Regards,

#851503#10
Date:
2017-01-15 17:46:11 UTC
From:
To:
control: tag -1 moreinfo

dhcommon-getifaddrs.patch is the only thing I think that would have
touched dhcrelay during the last two updates.  Can you try unapplying
that patch?

The only other thing I can think of is that and dhcrelay-listen.patch
do not interact correctly, so you could try unapplying that
separately.

It would also help if you could test 4.3.5-2 to make sure it wasn't a
change in that version, which I think is unlikely.

Best wishes,
Mike

#851503#15
Date:
2017-01-15 17:46:11 UTC
From:
To:
control: tag -1 moreinfo

dhcommon-getifaddrs.patch is the only thing I think that would have
touched dhcrelay during the last two updates.  Can you try unapplying
that patch?

The only other thing I can think of is that and dhcrelay-listen.patch
do not interact correctly, so you could try unapplying that
separately.

It would also help if you could test 4.3.5-2 to make sure it wasn't a
change in that version, which I think is unlikely.

Best wishes,
Mike

#851503#20
Date:
2017-01-22 16:57:51 UTC
From:
To:
On Sun, 15 Jan 2017 12:46:11 -0500 Michael Gilbert <mgilbert@debian.org> wrote:


Regards,

#851503#25
Date:
2017-01-22 19:45:34 UTC
From:
To:
On Sun, 22 Jan 2017 17:57:51 +0100 Wolfgang Walter <wolfgang.walter@stwm.de> wrote:


Regards,

#851503#30
Date:
2017-01-22 20:03:59 UTC
From:
To:
On Sun, 22 Jan 2017 20:45:34 +0100 Wolfgang Walter <wolfgang.walter@stwm.de> wrote:
seem

Just to correct me again: it works without that patch.

unattended-upgrades just installed the repo-version over it.

So: 4.3.5-3 without dhcommon-getifaddrs.patch works.

Sorry for the noise,

#851503#35
Date:
2026-08-05 17:31:09 UTC
From:
To:
Dear submitter,

as the package isc-dhcp has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/1143544

The version of this package that was in Debian prior to this removal
can still be found using https://snapshot.debian.org/.

Please note that the changes have been done on the master archive and
will not propagate to any mirrors until the next dinstall run at the
earliest.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Thorsten Alteholz (the ftpmaster behind the curtain)