[Bug 295520] Re: dhcp3-server vlan support seems to be broken

[gsupport]

DistroRelease: Ubuntu 9.10
Package: dhcp3-server 3.1.2-1ubuntu7.1
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 2.6.31-19.56-server

I can confirm that even with the recent configuration above any DHCP
requests that come over a tagged VLAN are also seen by the untagged
interface. Here is a sample request coming over VLAN 5;

DHCPDISCOVER from 00:23:8b:27:06:8b via eth1
DHCPDISCOVER from 00:23:8b:27:06:8b via eth1.5
DHCPOFFER on 192.168.213.152 to 00:23:8b:27:06:8b via eth1
DHCPOFFER on 192.168.205.150 to 00:23:8b:27:06:8b via eth1.5

In case there is any doubt;

#> grep VID /proc/net/vlan/eth1.5
eth1.5  VID: 5   REORDER_HDR: 1  dev->priv_flags: 1

The DHCP server still sees the tagged VLAN packets when the VLAN
interface isn't listed in INTERFACES.

#> dhcpd3 -d eth1
...
Listening on LPF/eth1/00:04:23:ab:3e:ea/192.168.213/24
Sending on   LPF/eth1/00:04:23:ab:3e:ea/192.168.213/24
Sending on   Socket/fallback/fallback-net
DHCPDISCOVER from 00:23:8b:27:06:8b via eth1
DHCPOFFER on 192.168.213.152 to 00:23:8b:27:06:8b via eth1

Naturally, the device doesn't see the offer as it is going out on the
untagged VLAN.

-- 
dhcp3-server vlan support seems to be broken
https://bugs.launchpad.net/bugs/295520
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