[Dnsmasq-discuss] No RA when router sollicitation sended

Daniel tech at tootai.net
Wed Mar 17 15:01:48 UTC 2021


Hi,

I'm setting up a only ipv6 POC and face problem that dnsmasq soesn't 
answer to router sollicitation. Here is the output of dnsmasq

dnsmasq: started, version 2.84rc2 cachesize 2048
dnsmasq: compile time options: IPv6 GNU-getopt DBus no-UBus no-i18n IDN 
DHCP DHCPv6 Lua TFTP conntrack ipset auth cryptohash DNSSEC loop-detect 
inotify dumpfile
dnsmasq-dhcp: DHCP, IP range 192.168.12.190 -- 192.168.12.191, lease time 2m
dnsmasq-dhcp: DHCP, IP range 192.168.10.195 -- 192.168.10.199, lease time 2m
dnsmasq-dhcp: DHCP, IP range 192.168.210.100 -- 192.168.210.104, lease 
time 2m
dnsmasq-dhcp: DHCP, IP range 192.168.10.50 -- 192.168.10.54, lease time 2m
dnsmasq-dhcp: DHCPv4-derived IPv6 names on fd53:9b48:337:8b38::
dnsmasq-dhcp: router advertisement on fd53:9b48:337:8b38::
dnsmasq-dhcp: IPv6 router advertisement enabled
dnsmasq-tftp: TFTP root is /tftpboot
dnsmasq: reading /etc/resolvPrivate.conf
dnsmasq: using nameserver 2001:db8:1298::#53
dnsmasq: read /etc/hostsPrivate - 12 addresses

ip -6 a lan (relevant part)
     inet6 fd53:9b48:337:8b38::254/64 scope global
        valid_lft forever preferred_lft forever
     inet6 fe80::5054:ff:fe12:3511/64 scope link
        valid_lft forever preferred_lft forever

tcpdump output from a RS which never get answered

15:54:09.204222 IP6 (flowlabel 0x8f8d5, hlim 255, next-header ICMPv6 
(58) payload length: 16) fe80::5054:ff:fee5:338a > ff02::2: [icmp6 sum 
ok] ICMP6, router
solicitation, length 16
           source link-address option (1), length 8 (1): 52:54:00:e5:33:8a
             0x0000:  5254 00e5 338a

I also tried with constructor in dnsmasq.conf like

dhcp-range=::1,::ffff:ffff, constructor=lan*,ra-names,64,2m

but no changes.

Any clue ?
-- 
Daniel

-- 
Daniel Huhardeaux
+33.368460088 at tootai.net	      sip:820 at sip.tootai.net
+41.445532125 at swiss-itech.ch		    tootaiNET



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