On Wed, Apr 19, 2023 at 04:32:46PM +0300, 0zl wrote: > On 4/19/23 13:35, 0zl wrote: > > On 4/19/23 11:38, Buck Horn wrote: > > > Wed, Apr 19, 2023, 0zl wrote: > > > > ..... > > > > Note that the capture includes a ARP probe from the ESP and no > > > > response, just keep in mind that the WiFi router does in fact > > > > respond to it, it just doesn't do so over that bridge port so it > > > > didn't get captured on the gateway's end. > > > > > > I think your issue starts earlier: > > > Your pcap indicates a failing lease renewal. > > > > > > Lines 12 to 18 show your ESP is attempting to renew its DHCP lease > > > through 10.46.109.1 after ~62 seconds as expected (about half the > > > 120secs leasetime) - but those requests seem to never have received > > > a reply. > > > > > > In absence of a reply from the known DHCP server, lines 19 to 27 > > > then show your ESP to send renewal requests to the broadcast > > > address. > > > > > > As those are not answered either, your ESP finally releases its > > > expired lease (line 28). > > > > > > It then initiates DHCP negotiation for a completely new lease, by > > > broadcasting for DHCP servers, and it's only then that ARP probing > > > would prompt it to DHCPDECLINE. > > > > > > But I'd have expected dnsmasq to have extended your ESP's existing > > > lease straight for the first DHCPREQUEST for renewal (line 12). > > > > > > This would suggest that dnsmasq has not received or ignored both > > > those DHCPREQUESTs for renewal as well as the DHCPRELEASE, which > > > could explain both the failed renewal as well as the offending > > > DHCPDECLINEs. > > > > > > Are you splitting your network, e.g. into several VLANs? > > > > > > It would be interesting to see what dnsmasq has been logging for > > > that exchange, to verify whether and how dnsmasq would have received > > > those DHCPREQUESTs for renewal. > > > > Some good news, it turns out my firewall was dropping any incoming DHCP > > message that was not a broadcast (only 255.255.255.255 was getting in) > > causing this problem. > > I declared victory too soon. NOT SOLVED. > > If the ESP was reconnecting and the ARP entry was still in cache, it will > refuse to connect HOWEVER renewal is now solved.
OKay, tell us what is at _your_ side. * Overview * Configuration * Logging * What is on the wire ( ".pcap" ) Groeten Geert Stappers P.S. > > You could consider this problem solved. > > Sorry for all the noise and concern for nothing. Advice: Document to working setup Request: Document it here, this mailinglist (archive) -- Silence is hard to parse _______________________________________________ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss
