[Dnsmasq-discuss] DHCP Relay across VLANs

[Ray Ramadorai]

Hi Chris,

Thank you for the note.  I was able to get the LEDE build environment
working and recompiled dnsmasq with the patch.  The patch, when applied to
v2.77, worked and DHCP relay is working as expected in my use case.  

Thanks for the help!

Ray

-----Original Message-----
From: Chris Novakovic [mailto:chris at chrisn.me.uk] 
Sent: Thursday, September 14, 2017 6:40 PM
To: Ray Ramadorai
Cc: dnsmasq-discuss at lists.thekelleys.org.uk
Subject: Re: [Dnsmasq-discuss] DHCP Relay across VLANs

On 15/09/2017 01:26, Ray Ramadorai wrote:
> Software versions working case:
> 
> Kernel:  Linux Openwrt 3.18.23 #1 SMP Sun Jan 31 15:32:38 CET 2016
> x86_64 GNU/Linux
> 
> DNSMasq:  Dnsmasq version 2.73  Copyright (c) 2000-2015 Simon Kelley
> 
> Compile time options: IPv6 GNU-getopt no-DBus no-i18n no-IDN DHCP
> no-DHCPv6 no-Lua TFTP no-conntrack no-ipset no-auth no-DNSSEC 
> loop-detect inotify
> 
>  
> 
> Software versions NOT working case:
> 
> Kernel:  Linux LEDE 4.4.71 #0 SMP Wed Jun 7 19:24:41 2017 x86_64 
> GNU/Linux
> 
> Dnsmasq version 2.77  Copyright (c) 2000-2016 Simon Kelley
> 
> Compile time options: IPv6 GNU-getopt no-DBus no-i18n no-IDN DHCP
> no-DHCPv6 no-Lua TFTP no-conntrack no-ipset no-auth no-DNSSEC no-ID 
> loop-detect inotify

DHCP relay was broken by a commit shortly before 2.76 was released [1], and
this breakage was itself recently fixed by a commit that'll eventually make
it into 2.78 [2]. If you're able to compile dnsmasq yourself, could you
check that [2] fixes the problem you're seeing?

[1]
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=ff325644c7afae2588
583f935f4ea9b9694eb52e
[2]
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=1649f709e7351f0c6b
bfedc5bd32744b330e2bcd