Re: [Dnsmasq-discuss] Noisy DHCPv6 DHCPADVERTISE
The message can be important (think a mismatch between the address of the receiving interface and a dhcp-range, so I wouldn't like to suppress it. It might be sensible to detect the situation you have (static range in scope, no host configured) and suppress it then. It's slightly more complicated since there can be more than one address request from the client, but that's a detail. Simon. > On 29/02/2024 11:04, Ian Dall wrote: I know this is an old thread, but I too find these messages annoying. I have: dhcp-range=set:lan,::,static,constructor:br-lan,slaac,ra-names,12h which as far as I can tell is perfectly valid. My unknown IPv6 clients get configured with SLAAC/RA, but clients which are known via dhcp-host get a DNS record so can be referenced by name (and the same name as their IPv4 address). Unfortunately the unknown clients do a DHCPv6 SOLICIT and get back "no addresses available". With "static" mode "no addresses available" is a lower priority error, although it could still be of interest because perhaps we expect a (known) address to be allocated, but is failing due to different DUID types or something (and you would want to know about that). So, it would be really nice to be able to optionally quieten these messages (with quiet-dhcp6 would be simplest). Regards, Ian On Sun, 2019-06-02 at 09:57 +0200, stappers at stappers.nl wrote: On Sat, Jun 01, 2019 at 08:02:27PM -0700, Sam Edwards wrote: Hello, I have dnsmasq set up to provide IPv6 RAs with the SLAAC bit set, and also serve select static DHCPv6 leases. Everything is set up and working correctly, but because only some devices have a static lease set up, and there is no DHCPv6 pool, my logs fill up with entries from devices that don't get a lease, reporting that there is no address available for them. Jun 1 19:46:56 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) 00:02:00:00:01:57:72:f6:40:68:e8:c6:6d:4e:8e:bd:fc:34:65:xx:xx:xx,no addresses available Jun 1 19:47:33 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) 00:01:00:01:1d:b7:03:73:3c:07:54:xx:xx:xx,no addresses available Jun 1 19:48:12 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) 00:01:00:01:21:4c:7f:01:08:66:98:xx:xx:xx,no addresses available Jun 1 19:48:57 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) 00:02:00:00:01:57:72:f6:40:68:e8:c6:6d:4e:8e:bd:fc:34:65:xx:xx:xx,no addresses available Jun 1 19:49:24 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) 00:01:00:01:1d:b7:03:73:3c:07:54:xx:xx:xx,no addresses available Jun 1 19:50:04 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) 00:01:00:01:21:4c:7f:01:08:66:98:xx:xx:xx,no addresses available Jun 1 19:50:57 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) 00:02:00:00:01:57:72:f6:40:68:e8:c6:6d:4e:8e:bd:fc:34:65:xx:xx:xx,no addresses available Jun 1 19:51:15 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) 00:01:00:01:1d:b7:03:73:3c:07:54:xx:xx:xx,no addresses available Jun 1 19:51:17 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) 00:01:00:01:23:38:5f:28:e0:33:8e:xx:xx:xx,no addresses available Jun 1 19:51:54 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) 00:01:00:01:21:4c:7f:01:08:66:98:xx:xx:xx,no addresses available I see in the source, around line 899 of src/rfc3315.c that there is code to suppress these messages when dnsmasq is operating strictly in stateless IPv6 mode, but that of course doesn't apply to me. The question I guess I'm really asking here then, is if the log entry that's emitted on line 905 of src/rfc3315.c shouldn't be a log6_quiet instead of a log6_packet, or if there's a feeling that this log line is important enough to be present at all times. Here's the relevant part of my configuration for reference: quiet-dhcp quiet-dhcp6 quiet-ra enable-ra ra-param=*,mtu:tun0,high,60 At http://thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html is dhcp-range=[tag:[,tag:],][set:,][,|constructor:][,][,][,] ... The optional keyword may be static which tells dnsmasq to enable DHCP for the network specified, but not to dynamically allocate IP addresses: only hosts which have static addresses given via --dhcp-host or from /etc/ethers will be served. A static-only subnet with address all zeros may be used as a "catch-all" address to enable replies to all Information-request packets on a subnet which is provided with stateless DHCPv6, ie --dhcp-range=::,static dhcp-range=set:Clients-v6,::,constructor:switch0.5,static,slaac,64,24h There is no mode 'static,slaac'. And mode 'static' is most likely the reason for the reported "no addresses available". If so we, dnsmasq project, have to discuss this manual page snippet A static-only subnet with address all zeros may be used as a "catch-all" address to enable replies to all Information-request packets on a subnet which is provided with stateless DHCPv6, ie --dhcp-range=::,static further. Or maybe not, an Information-request is another request as a request for an address. dhcp-option=tag:Clients-v6,option6:dns-server,[::]
Re: [Dnsmasq-discuss] Noisy DHCPv6 DHCPADVERTISE
I know this is an old thread, but I too find these messages annoying. I have: dhcp-range=set:lan,::,static,constructor:br-lan,slaac,ra-names,12h which as far as I can tell is perfectly valid. My unknown IPv6 clients get configured with SLAAC/RA, but clients which are known via dhcp-host get a DNS record so can be referenced by name (and the same name as their IPv4 address). Unfortunately the unknown clients do a DHCPv6 SOLICIT and get back "no addresses available". With "static" mode "no addresses available" is a lower priority error, although it could still be of interest because perhaps we expect a (known) address to be allocated, but is failing due to different DUID types or something (and you would want to know about that). So, it would be really nice to be able to optionally quieten these messages (with quiet-dhcp6 would be simplest). Regards, Ian On Sun, 2019-06-02 at 09:57 +0200, stappers at stappers.nl wrote: > On Sat, Jun 01, 2019 at 08:02:27PM -0700, Sam Edwards wrote: > > Hello, > > > > I have dnsmasq set up to provide IPv6 RAs with the SLAAC bit set, > > and also serve select static DHCPv6 leases. Everything is set up and > > working correctly, but because only some devices have a static lease > > set up, and there is no DHCPv6 pool, my logs fill up with entries from > > devices that don't get a lease, reporting that there is no address > > available for them. > > > > Jun 1 19:46:56 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > > 00:02:00:00:01:57:72:f6:40:68:e8:c6:6d:4e:8e:bd:fc:34:65:xx:xx:xx,no > > addresses available > > Jun 1 19:47:33 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > > 00:01:00:01:1d:b7:03:73:3c:07:54:xx:xx:xx,no addresses available > > Jun 1 19:48:12 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > > 00:01:00:01:21:4c:7f:01:08:66:98:xx:xx:xx,no addresses available > > Jun 1 19:48:57 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > > 00:02:00:00:01:57:72:f6:40:68:e8:c6:6d:4e:8e:bd:fc:34:65:xx:xx:xx,no > > addresses available > > Jun 1 19:49:24 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > > 00:01:00:01:1d:b7:03:73:3c:07:54:xx:xx:xx,no addresses available > > Jun 1 19:50:04 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > > 00:01:00:01:21:4c:7f:01:08:66:98:xx:xx:xx,no addresses available > > Jun 1 19:50:57 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > > 00:02:00:00:01:57:72:f6:40:68:e8:c6:6d:4e:8e:bd:fc:34:65:xx:xx:xx,no > > addresses available > > Jun 1 19:51:15 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > > 00:01:00:01:1d:b7:03:73:3c:07:54:xx:xx:xx,no addresses available > > Jun 1 19:51:17 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > > 00:01:00:01:23:38:5f:28:e0:33:8e:xx:xx:xx,no addresses available > > Jun 1 19:51:54 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > > 00:01:00:01:21:4c:7f:01:08:66:98:xx:xx:xx,no addresses available > > > > I see in the source, around line 899 of src/rfc3315.c that there is > > code to suppress these messages when dnsmasq is operating strictly in > > stateless IPv6 mode, but that of course doesn't apply to me. > > > > The question I guess I'm really asking here then, is if the log entry > > that's emitted on line 905 of src/rfc3315.c shouldn't be a log6_quiet > > instead of a log6_packet, or if there's a feeling that this log line > > is important enough to be present at all times. > > > > Here's the relevant part of my configuration for reference: > > > > quiet-dhcp > > quiet-dhcp6 > > quiet-ra > > enable-ra > > ra-param=*,mtu:tun0,high,60 > > At http://thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html is > > dhcp-range=[tag:[,tag:],][set:,][,|constructor:][,][,][, time>] > > ... > > The optional keyword may be static which tells dnsmasq to enable > DHCP for the network specified, but not to dynamically allocate IP > addresses: only hosts which have static addresses given via --dhcp-host > or from /etc/ethers will be served. A static-only subnet with address > all zeros may be used as a "catch-all" address to enable replies to all > Information-request packets on a subnet which is provided with > stateless DHCPv6, ie --dhcp-range=::,static > > > dhcp-range=set:Clients-v6,::,constructor:switch0.5,static,slaac,64,24h > > There is no mode 'static,slaac'. And mode 'static' is most likely > the reason for the reported "no addresses available". > > If so we, dnsmasq project, have to discuss this manual page snippet > > A static-only subnet with address all zeros may be used as a "catch-all" > address to enable replies to all Information-request packets on a subnet > which is provided with stateless DHCPv6, ie --dhcp-range=::,static > > further. Or maybe not, an Information-request is another request > as a request for an address. > > > > dhcp-option=tag:Clients-v6,option6:dns-server,[::] > > dhcp-option=tag:Clients-v6,option6:domain-search,example.com > > And at http://thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html is this > > dhcp-host=[][,id:|*][,set:][,][,][,][,ignore] >
Re: [Dnsmasq-discuss] Noisy DHCPv6 DHCPADVERTISE
On Sat, Jun 01, 2019 at 08:02:27PM -0700, Sam Edwards wrote: > Hello, > > I have dnsmasq set up to provide IPv6 RAs with the SLAAC bit set, > and also serve select static DHCPv6 leases. Everything is set up and > working correctly, but because only some devices have a static lease > set up, and there is no DHCPv6 pool, my logs fill up with entries from > devices that don't get a lease, reporting that there is no address > available for them. > > Jun 1 19:46:56 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > 00:02:00:00:01:57:72:f6:40:68:e8:c6:6d:4e:8e:bd:fc:34:65:xx:xx:xx,no > addresses available > Jun 1 19:47:33 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > 00:01:00:01:1d:b7:03:73:3c:07:54:xx:xx:xx,no addresses available > Jun 1 19:48:12 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > 00:01:00:01:21:4c:7f:01:08:66:98:xx:xx:xx,no addresses available > Jun 1 19:48:57 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > 00:02:00:00:01:57:72:f6:40:68:e8:c6:6d:4e:8e:bd:fc:34:65:xx:xx:xx,no > addresses available > Jun 1 19:49:24 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > 00:01:00:01:1d:b7:03:73:3c:07:54:xx:xx:xx,no addresses available > Jun 1 19:50:04 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > 00:01:00:01:21:4c:7f:01:08:66:98:xx:xx:xx,no addresses available > Jun 1 19:50:57 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > 00:02:00:00:01:57:72:f6:40:68:e8:c6:6d:4e:8e:bd:fc:34:65:xx:xx:xx,no > addresses available > Jun 1 19:51:15 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > 00:01:00:01:1d:b7:03:73:3c:07:54:xx:xx:xx,no addresses available > Jun 1 19:51:17 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > 00:01:00:01:23:38:5f:28:e0:33:8e:xx:xx:xx,no addresses available > Jun 1 19:51:54 dnsmasq-dhcp[4798]: DHCPADVERTISE(switch0.5) > 00:01:00:01:21:4c:7f:01:08:66:98:xx:xx:xx,no addresses available > > I see in the source, around line 899 of src/rfc3315.c that there is > code to suppress these messages when dnsmasq is operating strictly in > stateless IPv6 mode, but that of course doesn't apply to me. > > The question I guess I'm really asking here then, is if the log entry > that's emitted on line 905 of src/rfc3315.c shouldn't be a log6_quiet > instead of a log6_packet, or if there's a feeling that this log line > is important enough to be present at all times. > > Here's the relevant part of my configuration for reference: > > quiet-dhcp > quiet-dhcp6 > quiet-ra > enable-ra > ra-param=*,mtu:tun0,high,60 At http://thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html is dhcp-range=[tag:[,tag:],][set:,][,|constructor:][,][,][,] ... The optional keyword may be static which tells dnsmasq to enable DHCP for the network specified, but not to dynamically allocate IP addresses: only hosts which have static addresses given via --dhcp-host or from /etc/ethers will be served. A static-only subnet with address all zeros may be used as a "catch-all" address to enable replies to all Information-request packets on a subnet which is provided with stateless DHCPv6, ie --dhcp-range=::,static > dhcp-range=set:Clients-v6,::,constructor:switch0.5,static,slaac,64,24h There is no mode 'static,slaac'. And mode 'static' is most likely the reason for the reported "no addresses available". If so we, dnsmasq project, have to discuss this manual page snippet A static-only subnet with address all zeros may be used as a "catch-all" address to enable replies to all Information-request packets on a subnet which is provided with stateless DHCPv6, ie --dhcp-range=::,static further. Or maybe not, an Information-request is another request as a request for an address. > dhcp-option=tag:Clients-v6,option6:dns-server,[::] > dhcp-option=tag:Clients-v6,option6:domain-search,example.com And at http://thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html is this dhcp-host=[][,id:|*][,set:][,][,][,][,ignore] Now find ',' or ',ignore' in belows dhcp-host lines. > dhcp-host=3c:07:54:xx:xx:xx,set:Clients-v6,[::5],caesar,caesar.example.com > dhcp-host=id:00:01:00:01:20:69:f8:4b:b8:27:eb:xx:xx:xx,set:Clients-v6,[::7],prince,prince.example.com > dhcp-host=id:00:03:00:01:00:1f:f3:xx:xx:xx,set:Clients-v6,[::9],kitchen.example.com > dhcp-host=22:88:fe:xx:xx:xx,set:Clients-v6,[::235],adiutor,adiutor.example.com > dhcp-host=8e:16:5c:xx:xx:xx,set:Clients-v6,[::91],peel,peel.example.com > dhcp-host=7e:44:1c:xx:xx:xx,set:Clients-v6,[::126],solium,solium.example.com > dhcp-host=fa:76:fc:xx:xx:xx,set:Clients-v6,[::222],fenestram,fenestram.example.com > dhcp-host=id:00:01:00:01:23:f2:35:79:6c:0b:84:xx:xx:xx,set:Clients-v6,[::250],imbrem,imbrem.example.com Regards Geert Stappers Looking forward to "Yes, now it works also me" messages. -- Leven en laten leven ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
