Re: [Dnsmasq-discuss] dnsmasq and RA
On 11/01/2012 10:08 AM, Simon Kelley wrote: On 01/11/12 12:59, Gene Czarcinski wrote: On 10/31/2012 04:41 PM, Gene Czarcinski wrote: Instead of running both radvd and dnsmasq, I would like to run only dnsmasq and have it do what is now being done by radvd. This is for libvirt so there are some specifics which could help. 1. There will be one and only one interface for an instance of dnsmasq. 2. Currently (at least with some patches I have created) run one ipv4 dhcp subnetwork or one ipv6 dhcp supnetwork or both one ipv4 network and one ipv6 network. 3. If a dhcp-range is specified for the ipv6 subnetwork then I need the AdvManagedFlag on which (I believe) is done with the additional dsnmasq parameter "enable-ra". 4. But, I may have an IPv6 subnetwork but dhcp-range has not been specified. In this case I want the AdvManagedFlag off. This one is the situation that I am not clear on. 5. None of the other dnsmasq capabilities with respect to RA will be used. Comments/suggestions? If this requires a little enhancement patch, I am willing. OK, I believe I have answered my own question but I would still like confirmation. I ran a test with no radvd running ... only dnsmasq. With enable-ra and dhcp-range specified for ipv6 addresses, the client side gets a dhcp6 address and RA default route. Check. With enable-ra and NO dhcp-range specified, the client gets a SLAAC address and RA default route. That's not what I'd expect. To get RA on a subnet but not dhcp, you need to have dhcp-range=,ra-only enable-ra is superfluous in that case. Yup! Now works like a charm. with real dhcp-range and enable-ra I get dhcp6 and RA route. with dhcp-range=,ra-only I get SLAAC address and RA route. And, in both cases the is an RDNSS entry in /etc/resolve With enable-ra and dhcp-range,I do notice a lot of RTR-ADVERT messages ... like one every couple of seconds. Is there a way to suppress this message and/or increase the time between the events or at least the messages [that is without disabling dhcp logging] ? The frequency will decrease over time. It's roughly every 10 seconds for the first minute, and then about every 10 minutes. I will need to let it run for a while ... these have been quick tests Gene ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] dnsmasq and RA
On 11/01/2012 10:12 AM, Simon Kelley wrote: On 01/11/12 13:48, Gene Czarcinski wrote: On 11/01/2012 08:59 AM, Gene Czarcinski wrote: On 10/31/2012 04:41 PM, Gene Czarcinski wrote: Instead of running both radvd and dnsmasq, I would like to run only dnsmasq and have it do what is now being done by radvd. This is for libvirt so there are some specifics which could help. 1. There will be one and only one interface for an instance of dnsmasq. 2. Currently (at least with some patches I have created) run one ipv4 dhcp subnetwork or one ipv6 dhcp supnetwork or both one ipv4 network and one ipv6 network. 3. If a dhcp-range is specified for the ipv6 subnetwork then I need the AdvManagedFlag on which (I believe) is done with the additional dsnmasq parameter "enable-ra". 4. But, I may have an IPv6 subnetwork but dhcp-range has not been specified. In this case I want the AdvManagedFlag off. This one is the situation that I am not clear on. 5. None of the other dnsmasq capabilities with respect to RA will be used. Comments/suggestions? If this requires a little enhancement patch, I am willing. OK, I believe I have answered my own question but I would still like confirmation. I ran a test with no radvd running ... only dnsmasq. With enable-ra and dhcp-range specified for ipv6 addresses, the client side gets a dhcp6 address and RA default route. With enable-ra and NO dhcp-range specified, the client gets a SLAAC address and RA default route. With enable-ra and dhcp-range,I do notice a lot of RTR-ADVERT messages ... like one every couple of seconds. Is there a way to suppress this message and/or increase the time between the events or at least the messages [that is without disabling dhcp logging] ? Maybe it would be useful is this message was only sent to the syslog once every ten or twenty events. One additional question With enable-ra and dhcp-range, then dnsmasq supplies the RDNS info in the RA packet but it does not if dchpv6 is not specified. It seems like this should be reversed. It will always supply the RDNS info if it can find a dhcp-option to get the info from. I wonder if you have another RA daemon on the net which is providing advertisements ahich are being used when you don't have them correctly configured in dnsmasq? Oops ... I had defined a IPv6 address so libvirt had radvd running. Reconfigured with IPv6 address and no radvd. This does require that I add two ip6tables rules for port 547 and forwarding between guests. It works. Gene ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] dnsmasq and RA
On 01/11/12 13:48, Gene Czarcinski wrote: > On 11/01/2012 08:59 AM, Gene Czarcinski wrote: >> On 10/31/2012 04:41 PM, Gene Czarcinski wrote: >>> Instead of running both radvd and dnsmasq, I would like to run only >>> dnsmasq and have it do what is now being done by radvd. >>> >>> This is for libvirt so there are some specifics which could help. >>> >>> 1. There will be one and only one interface for an instance of dnsmasq. >>> >>> 2. Currently (at least with some patches I have created) run one ipv4 >>> dhcp subnetwork or one ipv6 dhcp supnetwork or both one ipv4 network >>> and one ipv6 network. >>> >>> 3. If a dhcp-range is specified for the ipv6 subnetwork then I need >>> the AdvManagedFlag on which (I believe) is done with the additional >>> dsnmasq parameter "enable-ra". >>> >>> 4. But, I may have an IPv6 subnetwork but dhcp-range has not been >>> specified. In this case I want the AdvManagedFlag off. This one is >>> the situation that I am not clear on. >>> >>> 5. None of the other dnsmasq capabilities with respect to RA will be >>> used. >>> >>> Comments/suggestions? >>> >>> If this requires a little enhancement patch, I am willing. >>> >>> >> OK, I believe I have answered my own question but I would still like >> confirmation. >> >> I ran a test with no radvd running ... only dnsmasq. With enable-ra >> and dhcp-range specified for ipv6 addresses, the client side gets a >> dhcp6 address and RA default route. With enable-ra and NO dhcp-range >> specified, the client gets a SLAAC address and RA default route. >> >> With enable-ra and dhcp-range,I do notice a lot of RTR-ADVERT messages >> ... like one every couple of seconds. Is there a way to suppress this >> message and/or increase the time between the events or at least the >> messages [that is without disabling dhcp logging] ? >> >> Maybe it would be useful is this message was only sent to the syslog >> once every ten or twenty events. >> > One additional question With enable-ra and dhcp-range, then dnsmasq > supplies the RDNS info in the RA packet but it does not if dchpv6 is not > specified. It seems like this should be reversed. It will always supply the RDNS info if it can find a dhcp-option to get the info from. I wonder if you have another RA daemon on the net which is providing advertisements ahich are being used when you don't have them correctly configured in dnsmasq? Cheers, Simon. > > Gene > > ___ > Dnsmasq-discuss mailing list > Dnsmasq-discuss@lists.thekelleys.org.uk > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss > ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] dnsmasq and RA
On 01/11/12 12:59, Gene Czarcinski wrote: > On 10/31/2012 04:41 PM, Gene Czarcinski wrote: >> Instead of running both radvd and dnsmasq, I would like to run only >> dnsmasq and have it do what is now being done by radvd. >> >> This is for libvirt so there are some specifics which could help. >> >> 1. There will be one and only one interface for an instance of dnsmasq. >> >> 2. Currently (at least with some patches I have created) run one ipv4 >> dhcp subnetwork or one ipv6 dhcp supnetwork or both one ipv4 network >> and one ipv6 network. >> >> 3. If a dhcp-range is specified for the ipv6 subnetwork then I need >> the AdvManagedFlag on which (I believe) is done with the additional >> dsnmasq parameter "enable-ra". >> >> 4. But, I may have an IPv6 subnetwork but dhcp-range has not been >> specified. In this case I want the AdvManagedFlag off. This one is >> the situation that I am not clear on. >> >> 5. None of the other dnsmasq capabilities with respect to RA will be >> used. >> >> Comments/suggestions? >> >> If this requires a little enhancement patch, I am willing. >> >> > OK, I believe I have answered my own question but I would still like > confirmation. > > I ran a test with no radvd running ... only dnsmasq. With enable-ra and > dhcp-range specified for ipv6 addresses, the client side gets a dhcp6 > address and RA default route. Check. > With enable-ra and NO dhcp-range > specified, the client gets a SLAAC address and RA default route. That's not what I'd expect. To get RA on a subnet but not dhcp, you need to have dhcp-range=,ra-only enable-ra is superfluous in that case. > > With enable-ra and dhcp-range,I do notice a lot of RTR-ADVERT messages > ... like one every couple of seconds. Is there a way to suppress this > message and/or increase the time between the events or at least the > messages [that is without disabling dhcp logging] ? The frequency will decrease over time. It's roughly every 10 seconds for the first minute, and then about every 10 minutes. Cheers, Simon. > > Maybe it would be useful is this message was only sent to the syslog > once every ten or twenty events. > > Gene > > > ___ > Dnsmasq-discuss mailing list > Dnsmasq-discuss@lists.thekelleys.org.uk > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss > ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] dnsmasq and RA
On 11/01/2012 08:59 AM, Gene Czarcinski wrote: On 10/31/2012 04:41 PM, Gene Czarcinski wrote: Instead of running both radvd and dnsmasq, I would like to run only dnsmasq and have it do what is now being done by radvd. This is for libvirt so there are some specifics which could help. 1. There will be one and only one interface for an instance of dnsmasq. 2. Currently (at least with some patches I have created) run one ipv4 dhcp subnetwork or one ipv6 dhcp supnetwork or both one ipv4 network and one ipv6 network. 3. If a dhcp-range is specified for the ipv6 subnetwork then I need the AdvManagedFlag on which (I believe) is done with the additional dsnmasq parameter "enable-ra". 4. But, I may have an IPv6 subnetwork but dhcp-range has not been specified. In this case I want the AdvManagedFlag off. This one is the situation that I am not clear on. 5. None of the other dnsmasq capabilities with respect to RA will be used. Comments/suggestions? If this requires a little enhancement patch, I am willing. OK, I believe I have answered my own question but I would still like confirmation. I ran a test with no radvd running ... only dnsmasq. With enable-ra and dhcp-range specified for ipv6 addresses, the client side gets a dhcp6 address and RA default route. With enable-ra and NO dhcp-range specified, the client gets a SLAAC address and RA default route. With enable-ra and dhcp-range,I do notice a lot of RTR-ADVERT messages ... like one every couple of seconds. Is there a way to suppress this message and/or increase the time between the events or at least the messages [that is without disabling dhcp logging] ? Maybe it would be useful is this message was only sent to the syslog once every ten or twenty events. One additional question With enable-ra and dhcp-range, then dnsmasq supplies the RDNS info in the RA packet but it does not if dchpv6 is not specified. It seems like this should be reversed. Gene ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] dnsmasq and RA
On 10/31/2012 04:41 PM, Gene Czarcinski wrote: Instead of running both radvd and dnsmasq, I would like to run only dnsmasq and have it do what is now being done by radvd. This is for libvirt so there are some specifics which could help. 1. There will be one and only one interface for an instance of dnsmasq. 2. Currently (at least with some patches I have created) run one ipv4 dhcp subnetwork or one ipv6 dhcp supnetwork or both one ipv4 network and one ipv6 network. 3. If a dhcp-range is specified for the ipv6 subnetwork then I need the AdvManagedFlag on which (I believe) is done with the additional dsnmasq parameter "enable-ra". 4. But, I may have an IPv6 subnetwork but dhcp-range has not been specified. In this case I want the AdvManagedFlag off. This one is the situation that I am not clear on. 5. None of the other dnsmasq capabilities with respect to RA will be used. Comments/suggestions? If this requires a little enhancement patch, I am willing. OK, I believe I have answered my own question but I would still like confirmation. I ran a test with no radvd running ... only dnsmasq. With enable-ra and dhcp-range specified for ipv6 addresses, the client side gets a dhcp6 address and RA default route. With enable-ra and NO dhcp-range specified, the client gets a SLAAC address and RA default route. With enable-ra and dhcp-range,I do notice a lot of RTR-ADVERT messages ... like one every couple of seconds. Is there a way to suppress this message and/or increase the time between the events or at least the messages [that is without disabling dhcp logging] ? Maybe it would be useful is this message was only sent to the syslog once every ten or twenty events. Gene ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
