<div dir="ltr"><div dir="ltr"></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr"><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Sun, May 15, 2022 at 01:10:40AM +0200, Kamil via Dnsmasq-discuss wrote:<br>
> On Sat, May 14, 2022 at 11:27:34AM +0200, Geert Stappers via Dnsmasq-discuss wrote:<br>
> > On Sat, May 14, 2022 at 02:53:51AM +0200, Kamil via Dnsmasq-discuss wrote:<br>
... <br>
> > > 1. I plug one device - it works.<br>
> > > 2. I unplug it and plug the RTMU86 - doesn't work.<br>
> > > 3. I Unplug RTMU86 and plug any other device - it works.<br>
> > ><br>
... <br>
> > Be yourself, accept yourself. Full focus on the challenge that you are<br>
> > facing.<br>
> <br>
> Sure<br>
> <br>
<br>
What proof is available of<br>
the RTMU86 sending DHCP packages<br>
when pluging the ethercable back in?<br></blockquote><div><br></div><div>
<div>RTMU86 has a led indicator that is lid when the address has been assigned to it. <br></div><div>1. If I plug
RTMU86 to the home router - the led is on, I can find its IP in the router's lease list and I can ping this IP</div><div>2.
If I plug
RTMU86 to the RPi with
isc-dhcp-server
configured - the led is on, I can find its IP in the
isc-dhcp-server's lease list and I can ping this IP <br></div><div>3. If
I plug
RTMU86 to the RPi with
Dnsmasq
configured - I can use tcpdump which gives me this output (I changed MAC
addresses):</div><div>>
16:17:31.125779 IP 0.0.0.0.bootpc > 255.255.255.255.bootps:
BOOTP/DHCP, Request from fa:XX:XX:XX:XX:1c (oui Unknown), length 300</div><div>So I presume that
RTMU86
indeed sends DHCP packages,
but the led is off and I can not find it in the Dnsmasq lease list.</div><div><br></div><div>Full tcpdump log (with changed MAC addresses) below:</div><div>> 16:17:28.175124 IP6 :: > ff02::16: HBH ICMP6, multicast listener report v2, 2 group record(s), length 48<br>> 16:17:28.187120 IP6 :: > ff02::16: HBH ICMP6, multicast listener report v2, 4 group record(s), length 88<br>> 16:17:28.199412 ARP, Request who-has 192.168.6.1 tell 0.0.0.0, length 28<br>> 16:17:28.235076 IP6 :: > ff02::16: HBH ICMP6, multicast listener report v2, 4 group record(s), length 88<br>> 16:17:28.483118 IP6 :: > ff02::1:fffb:fe9: ICMP6, neighbor solicitation, who has fe80::XX:XX:XX:fe9, length 32<br>>
16:17:29.507285 IP6 fe80::XX:XX:XX:fe9 > ff02::16: HBH ICMP6,
multicast listener report v2, 5 group record(s), length 108<br>> 16:17:29.507966 IP6 fe80::XX:XX:XX:fe9 > ip6-allrouters: ICMP6, router solicitation, length 16<br>> 16:17:29.519049 IP6 fe80::XX:XX:XX:fe9 > ff02::16: HBH ICMP6, multicast listener report v2, 1 group record(s), length 28<br>>
16:17:29.891065 IP6 fe80::XX:XX:XX:fe9 > ff02::16: HBH ICMP6,
multicast listener report v2, 5 group record(s), length 108<br>> 16:17:30.019064 IP6 fe80::XX:XX:XX:fe9 > ff02::16: HBH ICMP6, multicast listener report v2, 1 group record(s), length 28<br>>
16:17:30.077265 IP6 fe80::XX:XX:XX:fe9.mdns > ff02::fb.mdns: 0*-
[0q] 2/0/0 (Cache flush) PTR myhost.local., (Cache flush) AAAA
fe80::XX:XX:XX:fe9 (139)<br>> 16:17:30.151935 ARP, Request who-has 192.168.6.1 tell 0.0.0.0, length 28<br>>
16:17:31.125779 IP 0.0.0.0.bootpc > 255.255.255.255.bootps:
BOOTP/DHCP, Request from fa:XX:XX:XX:XX:1c (oui Unknown), length 300<br>> 16:17:31.728625 ARP, Request who-has 192.168.6.1 tell 0.0.0.0, length 28<br>>
16:17:32.152301 IP6 fe80::XX:XX:XX:fe9.mdns > ff02::fb.mdns: 0*-
[0q] 2/0/0 (Cache flush) PTR myhost.local., (Cache flush) AAAA
fe80::XX:XX:XX:fe9 (139)<br>> 16:17:33.510623 IP6 fe80::XX:XX:XX:fe9 > ip6-allrouters: ICMP6, router solicitation, length 16<br>> 16:17:33.730051 ARP, Request who-has 192.168.6.1 tell 192.168.6.1, length 28<br>> 16:17:33.739141 IP 192.168.6.1 > <a href="http://igmp.mcast.net" target="_blank">igmp.mcast.net</a>: igmp v3 report, 1 group record(s)</div><div><br></div><div>PS.
I've read in FAQ about
255.255.255.255 broadcast and invalid firewall rules, but I don't have
any firewall rules and I'm not changing network config files when
switching to
isc-dhcp-server (which I use as a benchmark)</div><div><br></div><div>Kind regards,</div><div>Kamil</div>
</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
<br>
Groeten<br>
Geert Stappers<br>
-- <br>
Silence is hard to parse<br>
<br>
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</blockquote></div></div>