[Dnsmasq-discuss] DHCP Relay across VLANs

[Chris Novakovic]

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=ff325644c7afae2588583f935f4ea9b9694eb52e
[2]
http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=1649f709e7351f0c6bbfedc5bd32744b330e2bcd