[Dnsmasq-discuss] DHCP server not assigning IP to RTMU86
Nicolas Cavallari
nicolas.cavallari at green-communications.fr
Sat Jun 4 16:54:18 UTC 2022
On 23/05/2022 20:34, Kamil via Dnsmasq-discuss wrote:
> Dear Nicolas,
>
> I've tried isc-dhcp-server without "authoritative" and it still work fine
>
>
> If anything else fails, use tcpdump/wireshark.
>
>
>
> I've used tcpdump. I've attached full log in this message:
> https://www.mail-archive.com/dnsmasq-discuss@lists.thekelleys.org.uk/msg16249.html
> <https://www.mail-archive.com/dnsmasq-discuss@lists.thekelleys.org.uk/msg16249.html>
> please have a look.
There isn't enough information to debug things. tcpdump only report a
DHCP message of size 300 without reporting its content, which are
important to see what's happening.
Ideally we would need a pcap file. Censoring information in a pcap file
is not easy but still possible with a hex editor. Otherwise you can use
"tshark -r capture.pcap -V" to output a text representation of the pcap,
censor the output and give us the result.
Also, focus on the DHCP exchange with the RTMU86 that does not work. We
already know how a successful DHCP exchange look like.
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