I'm running Dnsmasq version 2.85-openssl-5-g989ee98 on an embedded device (Entware installation)
I am seeing log entries that state the following when clients come onto the network to request IP addresses via DHCP: "no address range available for DHCP request via br0" br0 is a bridged interface that includes the LAN and main WiFi of the embedded device. The issue is that I do not use dnsmasq on this device for DHCP on this interface. (I do have it configured to deliver dhcp-range information to some other wireless interfaces.) The main function on this interface is DNS and to deliver RAs for IPv6. It appears, in order to deliver RAs to my clients the following lines must be configured: ------------------- interface=br0 ra-param=br0,10,600 enable-ra dhcp-range=lan,::,constructor:br0,ra-stateless,64,600 ----------------------- In other words, dhnsmasq must be configured to deliver the "dhcp-range" option in order to deliver RAs (enable-ra isn't enough) Because of this you can't use the "no-dhcp-interface=br0" option or else the dhcp-range and therefore the RA will not get delivered to clients. When a client joins the network, it requests an IPv4 address, which will not be served by dnsmasq, but by another authoritative server on the network. However, because dnsmasq is configured to provide DHCP services, yet has no IPv4 range defined it spits out the "no address range available" I have tried changing the "ra-stateless" option to "slaac" or "ra-only" as the description of "ra-only" seems to indicate that dnsmasq will then be made aware it is only to deliver RAs and not DHCP (though perhaps this only registers for v6). I have also tried to use "quiet-dhcp" to suppress these unsuccessfully. Because the message is still logged, it would fall under "error or problem" according to "quiet-dhcp" specifications. Is this behavior expected? If so, is it considered preferable or should dnsmasq have some configuration where it should not assume that an IPv4 range being unconfigured is an issue worth notifying about in scenarios like this? thank you
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