Re: [Dnsmasq-discuss] Sending RA without dhcp-range
Hi, Simon: Truly appreciate your further clarification! The use case I am dealing with now is, there is another DHCPv6 server (stateful or stateless) on the same link. Dnsmasq only needs to send RA to trigger DHCPv6 Solicit in the same way router does. Being said, is it possible that we can shutdown the DHCPv6 port, so dnsmasq won’t listen to DHCPv6 message? Or change it from different port? Thanks again! Shixiong On Jan 17, 2014, at 9:32 AM, Simon Kelley si...@thekelleys.org.uk wrote: On 17/01/14 14:21, Shixiong Shang wrote: Hi, Simon and Albert: Thank both of you for quick response! According to the man page online, the mode like “ra-only”, and “ra-stateless” are only used as part of “dhcp-range” option. However, this will also turn dnsmasq to DHCPv6 server, which I try to avoid. It confusing, I agree but dhcp-range=1234:5678::,ra-only _doesn't turn on the DHCPv6 server, and least for that prefix, and dhcp-range=1234:5678::,ra-stateless turns on the DHCPv6 server only to replt to information-requests, not address allocation. Cheers, Simon. Would you please help me clarify how I can send RA on specific interfaces with the right flags? The only thing I can think of is leveraging “—ra-param”, but it doesn’t have place to put in mode keywords….. Thanks again! Shixiong On Jan 17, 2014, at 5:49 AM, Simon Kelley si...@thekelleys.org.uk wrote: On 17/01/14 06:10, Albert ARIBAUD wrote: Le 17/01/2014 05:30, Shixiong Shang a écrit : Hi, experts: Is it possible that dnsmasq can send out RA with either A=0, MO=1 (i.e. for DHCPv6 Stateful), or AO=1, M=0 (i.e. for DHCPv6 Stateless) WITHOUT dhcp-range? What I am trying to achieve here is using dnsmasq to send out RA to trigger DHCPv6 Stateful or DHCPv6 Stateless mode without acting as DHCPv6 server. Based on my reading, I am under the impression that “—enable-ra” must be used with “—dhcp-range”. Otherwise, dnsmasq will not send RA….. You are right about having to add enable-ra. However there is a syntax of dhcp-range which will not cause DHCPv6. As per 'man dnsmasq' (search for 'dhcp-range'), the possible modes for IPv6 ranges include 'ra-only', which will previsely enable RAs without enabling any DHCP. Neither of you are completely right. enable-ra causes RA with A=0 and M = 1 O = 1 on every interface that's doing DHCP, just to instruct the clients to do stateful DHCP. It's intended as a simple option for systems which don't use RA at all. You don't need to set enable-ra at all to do RA on specific interfaces with other flag combinations, ie ra-only A=1 M=0 O=0 slaac A=1 M=1 O=1 ra-stateless A=1 M=0 O=1 Cheers, Simon. ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] tags in opts file
Hi, experts: I have an opts_file which contains the entries for two tags, tag0 and tag1. Two dnsmasq instances are sharing the same opts_file. In this case, is it possible to let the first dnsmasq only read the opts entires beginning with tag0, and let the 2nd dnsmasq instance only read the opts entries beginning with tag1? /var/lib/app/b3051625-e7de-4500-99d9-e9e80f5a8349/opts tag:tag0,option6:dns-server,[2001:4860:4860::] tag:tag0,option6:domain-search,sandbox.com tag:tag1,option:dns-server,8.8.8.8 tag:tag1,option:router,192.168.3.1 dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces --except-interface=lo --leasefile-ro --dhcp-range=set:tag0,192.168.2.0,static,86400s --dhcp-optsfile=/var/lib/app/b3051625-e7de-4500-99d9-e9e80f5a8349/opts --dhcp-hostsfile=/var/lib/app/b3051625-e7de-4500-99d9-e9e80f5a8349/host --dhcp-lease-max=256 --interface=ns-43a4981b-48 --pid-file=/var/lib/app/b3051625-e7de-4500-99d9-e9e80f5a8349/pid dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces --except-interface=lo --leasefile-ro --enable-ra --dhcp-range=set:tag1,2001:db8:2::,ra-stateless,86400s --dhcp-optsfile=/var/lib/app/b3051625-e7de-4500-99d9-e9e80f5a8349/opts --interface=qr-d104fbe1-04 --pid-file=/var/lib/app/b3051625-e7de-4500-99d9-e9e80f5a8349/ipv6pid Thanks! Shixiong ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Difference between SLAAC and RA-ONLY mode
I am using version 2.66. On Dec 19, 2013, at 5:31 AM, Simon Kelley si...@thekelleys.org.uk wrote: On 19/12/13 04:02, Shixiong Shang wrote: I just found a workaround….If I replaced “slaac” mode with “static” mode, then it just worked fine…But I don’t understand why it worked. :( What version of dnsmasq are you using? That command line doesn't generate an error with the latest code. Cheers, Simon. On Dec 18, 2013, at 1:15 PM, Shixiong Shangsparkofwisdom.cl...@gmail.com wrote: Hi, Simon: I put the range inside —dhcp-range filed as shown below to enable DHCPv6 mode. When I issued the command, the dnsmasq didn’t return any error. However, it failed to launch and the syslog threw errors. I am wondering which the “bad dhcp-range” refer to? sudo dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces --except-interface=lo --leasefile-ro --enable-ra --port=547 --dhcp-range=set:tag1,2001:db8:2::2,2001:db8:2:0::::fffe,slaac --dhcp-hostsfile=/var/lib/app/dhcp/b3051625-e7de-4500-99d9-e9e80f5a8349/ipv6host --dhcp-option=tag:tag1,option6:dns-server,[2001:4860:4860::] --pid-file=/var/lib/app/dhcp/b3051625-e7de-4500-99d9-e9e80f5a8349/ipv6pid Dec 18 10:10:14 net-network2 dnsmasq[19722]: bad command line options: bad dhcp-range Dec 18 10:10:14 net-network2 dnsmasq[19722]: FAILED to start up Thanks! Shixiong On Dec 17, 2013, at 1:08 PM, Simon Kelleysi...@thekelleys.org.uk wrote: On 17/12/13 17:34, Shixiong Shang wrote: Hi, Simon: Thanks a lot for your quick clarification! Just want to make sure I clearly understand what you mean….if the dhcp-range contains a range of IPv6 address, then slaac should enable dhcpv6 + ra; if the dhcp-range contains the single IPv6 address, then slack will only do ra, but not dhcpv6…..Same as ra-only. In other words, how slaac/ra-only set MOAL bits depends on dhcp-range…..Is my understanding correct? That's correct. Simon. Shixiong On Dec 17, 2013, at 11:55 AM, Simon Kelleysi...@thekelleys.org.uk wrote: On 17/12/13 12:29, Shixiong Shang wrote: Hi, guys: I tried both “slaac” mode and “ra-only” modes with dnsmasq version 2.66. One thing I noticed was, both modes set the same bit value in the RA: M-bit = 0, O-bit = 0, A-bit = 1, L-bit = 1. I am wondering what’s the difference between these two modes then? Would you please shed some light on it? There's no difference: slaac and ra-only have exactly the same effect. Reading back the manpage, the description is very confusing and should be re-written. The reason for having two different keywords is that they can be used with and without DHCP dhcp-range = 1234::1, 1234::100, slaac will do RA with MOAL bits all set, and provide DHCPv6 dhcp-range = 1234::1, slaac will do RA with only AL bits set, and not DHCP. It's maybe clearer to be able to be able to write. dhcp-range = 1234::1, ra-only in this case. Cheers, Simon. Thanks! Shixiong ___ 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 ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] RA-Stateless mode question
Hi, expert: I am using the dnsmasq in DHCPv6 Stateless mode. Based on the sniffer trace, I saw my DHCPv6 client solicit optional information, but dnsmasq replied with nothing. The log showed “no address available”….Anything I did wrong? In addition, I saw in the man page that there is another way to configure stateless mode by using “—dhcp-range=::,static”. Is it the same? nobody9987 1 0 09:11 ?00:00:00 dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces --except-interface=lo --leasefile-ro --enable-ra --dhcp-range=set:tag1,2001:db8:2::,ra-stateless,86400s --dhcp-optsfile=/var/lib/app/dhcp/b3051625-e7de-4500-99d9-e9e80f5a8349/opts --interface=qr-d104fbe1-04 --pid-file=/var/lib/app/dhcp/b3051625-e7de-4500-99d9-e9e80f5a8349/ipv6pid Dec 19 09:17:32 net-network2 dnsmasq-dhcp[9987]: DHCPSOLICIT(qr-d104fbe1-04) 00:03:00:06:fa:16:3e:2a:9c:70 Dec 19 09:17:32 net-network2 dnsmasq-dhcp[9987]: DHCPADVERTISE(qr-d104fbe1-04) 00:03:00:06:fa:16:3e:2a:9c:70 no addresses available Thanks! Shixiong ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Difference between SLAAC and RA-ONLY mode
Tried and verified it! Working pretty well now! Thanks, Simon! Shixiong On Dec 19, 2013, at 10:48 AM, Simon Kelley si...@thekelleys.org.uk wrote: On 18/12/13 15:21, Shixiong Shang wrote: Hi, Simon: This is very helpful! Thanks a lot for your confirmation! A quick question, is there any way we can set M-bit to 1 and set A-bit to 0? In other words, I am trying to force VM to use DHCPv6 only, but not SLAAC? Yes, configure the dhcp-range _only_ for DHCPv6 ie dhcp-range=prefix::1,prefix::200 and set the --enable-ra flag That will do RA just to support the DHCPv6, ie MO bits set, A bit clear. Cheers, Simon. Thanks again! Shixiong On Dec 17, 2013, at 1:08 PM, Simon Kelleysi...@thekelleys.org.uk wrote: On 17/12/13 17:34, Shixiong Shang wrote: Hi, Simon: Thanks a lot for your quick clarification! Just want to make sure I clearly understand what you mean….if the dhcp-range contains a range of IPv6 address, then slaac should enable dhcpv6 + ra; if the dhcp-range contains the single IPv6 address, then slack will only do ra, but not dhcpv6…..Same as ra-only. In other words, how slaac/ra-only set MOAL bits depends on dhcp-range…..Is my understanding correct? That's correct. Simon. Shixiong On Dec 17, 2013, at 11:55 AM, Simon Kelleysi...@thekelleys.org.uk wrote: On 17/12/13 12:29, Shixiong Shang wrote: Hi, guys: I tried both “slaac” mode and “ra-only” modes with dnsmasq version 2.66. One thing I noticed was, both modes set the same bit value in the RA: M-bit = 0, O-bit = 0, A-bit = 1, L-bit = 1. I am wondering what’s the difference between these two modes then? Would you please shed some light on it? There's no difference: slaac and ra-only have exactly the same effect. Reading back the manpage, the description is very confusing and should be re-written. The reason for having two different keywords is that they can be used with and without DHCP dhcp-range = 1234::1, 1234::100, slaac will do RA with MOAL bits all set, and provide DHCPv6 dhcp-range = 1234::1, slaac will do RA with only AL bits set, and not DHCP. It's maybe clearer to be able to be able to write. dhcp-range = 1234::1, ra-only in this case. Cheers, Simon. Thanks! Shixiong ___ 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 ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Difference between SLAAC and RA-ONLY mode
Hi, Simon: This is very helpful! Thanks a lot for your confirmation! A quick question, is there any way we can set M-bit to 1 and set A-bit to 0? In other words, I am trying to force VM to use DHCPv6 only, but not SLAAC? Thanks again! Shixiong On Dec 17, 2013, at 1:08 PM, Simon Kelley si...@thekelleys.org.uk wrote: On 17/12/13 17:34, Shixiong Shang wrote: Hi, Simon: Thanks a lot for your quick clarification! Just want to make sure I clearly understand what you mean….if the dhcp-range contains a range of IPv6 address, then slaac should enable dhcpv6 + ra; if the dhcp-range contains the single IPv6 address, then slack will only do ra, but not dhcpv6…..Same as ra-only. In other words, how slaac/ra-only set MOAL bits depends on dhcp-range…..Is my understanding correct? That's correct. Simon. Shixiong On Dec 17, 2013, at 11:55 AM, Simon Kelleysi...@thekelleys.org.uk wrote: On 17/12/13 12:29, Shixiong Shang wrote: Hi, guys: I tried both “slaac” mode and “ra-only” modes with dnsmasq version 2.66. One thing I noticed was, both modes set the same bit value in the RA: M-bit = 0, O-bit = 0, A-bit = 1, L-bit = 1. I am wondering what’s the difference between these two modes then? Would you please shed some light on it? There's no difference: slaac and ra-only have exactly the same effect. Reading back the manpage, the description is very confusing and should be re-written. The reason for having two different keywords is that they can be used with and without DHCP dhcp-range = 1234::1, 1234::100, slaac will do RA with MOAL bits all set, and provide DHCPv6 dhcp-range = 1234::1, slaac will do RA with only AL bits set, and not DHCP. It's maybe clearer to be able to be able to write. dhcp-range = 1234::1, ra-only in this case. Cheers, Simon. Thanks! Shixiong ___ 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 ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Difference between SLAAC and RA-ONLY mode
Hi, Simon: I put the range inside —dhcp-range filed as shown below to enable DHCPv6 mode. When I issued the command, the dnsmasq didn’t return any error. However, it failed to launch and the syslog threw errors. I am wondering which the “bad dhcp-range” refer to? sudo dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces --except-interface=lo --leasefile-ro --enable-ra --port=547 --dhcp-range=set:tag1,2001:db8:2::2,2001:db8:2:0::::fffe,slaac --dhcp-hostsfile=/var/lib/app/dhcp/b3051625-e7de-4500-99d9-e9e80f5a8349/ipv6host --dhcp-option=tag:tag1,option6:dns-server,[2001:4860:4860::] --pid-file=/var/lib/app/dhcp/b3051625-e7de-4500-99d9-e9e80f5a8349/ipv6pid Dec 18 10:10:14 net-network2 dnsmasq[19722]: bad command line options: bad dhcp-range Dec 18 10:10:14 net-network2 dnsmasq[19722]: FAILED to start up Thanks! Shixiong On Dec 17, 2013, at 1:08 PM, Simon Kelley si...@thekelleys.org.uk wrote: On 17/12/13 17:34, Shixiong Shang wrote: Hi, Simon: Thanks a lot for your quick clarification! Just want to make sure I clearly understand what you mean….if the dhcp-range contains a range of IPv6 address, then slaac should enable dhcpv6 + ra; if the dhcp-range contains the single IPv6 address, then slack will only do ra, but not dhcpv6…..Same as ra-only. In other words, how slaac/ra-only set MOAL bits depends on dhcp-range…..Is my understanding correct? That's correct. Simon. Shixiong On Dec 17, 2013, at 11:55 AM, Simon Kelleysi...@thekelleys.org.uk wrote: On 17/12/13 12:29, Shixiong Shang wrote: Hi, guys: I tried both “slaac” mode and “ra-only” modes with dnsmasq version 2.66. One thing I noticed was, both modes set the same bit value in the RA: M-bit = 0, O-bit = 0, A-bit = 1, L-bit = 1. I am wondering what’s the difference between these two modes then? Would you please shed some light on it? There's no difference: slaac and ra-only have exactly the same effect. Reading back the manpage, the description is very confusing and should be re-written. The reason for having two different keywords is that they can be used with and without DHCP dhcp-range = 1234::1, 1234::100, slaac will do RA with MOAL bits all set, and provide DHCPv6 dhcp-range = 1234::1, slaac will do RA with only AL bits set, and not DHCP. It's maybe clearer to be able to be able to write. dhcp-range = 1234::1, ra-only in this case. Cheers, Simon. Thanks! Shixiong ___ 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 ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] IPv6 host file syntax
Got it! Now it works like a charm! Thanks, Simon! Thanks, Bertrand!! On Dec 17, 2013, at 4:18 PM, Simon Kelley si...@thekelleys.org.uk wrote: On 17/12/13 18:00, Shixiong Shang wrote: Hi, expert: I am using dnsmasq as DHCPv6 server and I created host file for my IPv6 DHCP range. The first field is DUID calculated by MAC, followed by hostname, and then IPv6 address. 00:03:00:06:fa:16:3e:03:63:36,host-2001-db8-3--1.openstacklocal,2001:db8:3::1 00:03:00:06:fa:16:3e:95:5f:6a,host-2001-db8-3--2.openstacklocal,2001:db8:3::2 00:03:00:06:fa:16:3e:0c:29:d6,host-2001-db8-3--f816-3eff-fe0c-29d6.openstacklocal,2001:db8:3::f816:3eff:fe0c:29d6 If you really want to use DUID, then the hex should have id: in front id:00:03:00:06:fa:16:3e:03:63:36,.. but calculating DUIDs is dangerous and fragile. The latest dnsmasq releases allow you to use MAC addresses directly. The IPv6 addresses should have [...] round them .,[2001:db8:3::1] Cheers, Simon. However, I cannot find any document to verify whether the above syntax is correct. Would you please clarify? Thanks! Shixiong ___ 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 ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Difference between SLAAC and RA-ONLY mode
I just found a workaround….If I replaced “slaac” mode with “static” mode, then it just worked fine…But I don’t understand why it worked. :( On Dec 18, 2013, at 1:15 PM, Shixiong Shang sparkofwisdom.cl...@gmail.com wrote: Hi, Simon: I put the range inside —dhcp-range filed as shown below to enable DHCPv6 mode. When I issued the command, the dnsmasq didn’t return any error. However, it failed to launch and the syslog threw errors. I am wondering which the “bad dhcp-range” refer to? sudo dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces --except-interface=lo --leasefile-ro --enable-ra --port=547 --dhcp-range=set:tag1,2001:db8:2::2,2001:db8:2:0::::fffe,slaac --dhcp-hostsfile=/var/lib/app/dhcp/b3051625-e7de-4500-99d9-e9e80f5a8349/ipv6host --dhcp-option=tag:tag1,option6:dns-server,[2001:4860:4860::] --pid-file=/var/lib/app/dhcp/b3051625-e7de-4500-99d9-e9e80f5a8349/ipv6pid Dec 18 10:10:14 net-network2 dnsmasq[19722]: bad command line options: bad dhcp-range Dec 18 10:10:14 net-network2 dnsmasq[19722]: FAILED to start up Thanks! Shixiong On Dec 17, 2013, at 1:08 PM, Simon Kelley si...@thekelleys.org.uk wrote: On 17/12/13 17:34, Shixiong Shang wrote: Hi, Simon: Thanks a lot for your quick clarification! Just want to make sure I clearly understand what you mean….if the dhcp-range contains a range of IPv6 address, then slaac should enable dhcpv6 + ra; if the dhcp-range contains the single IPv6 address, then slack will only do ra, but not dhcpv6…..Same as ra-only. In other words, how slaac/ra-only set MOAL bits depends on dhcp-range…..Is my understanding correct? That's correct. Simon. Shixiong On Dec 17, 2013, at 11:55 AM, Simon Kelleysi...@thekelleys.org.uk wrote: On 17/12/13 12:29, Shixiong Shang wrote: Hi, guys: I tried both “slaac” mode and “ra-only” modes with dnsmasq version 2.66. One thing I noticed was, both modes set the same bit value in the RA: M-bit = 0, O-bit = 0, A-bit = 1, L-bit = 1. I am wondering what’s the difference between these two modes then? Would you please shed some light on it? There's no difference: slaac and ra-only have exactly the same effect. Reading back the manpage, the description is very confusing and should be re-written. The reason for having two different keywords is that they can be used with and without DHCP dhcp-range = 1234::1, 1234::100, slaac will do RA with MOAL bits all set, and provide DHCPv6 dhcp-range = 1234::1, slaac will do RA with only AL bits set, and not DHCP. It's maybe clearer to be able to be able to write. dhcp-range = 1234::1, ra-only in this case. Cheers, Simon. Thanks! Shixiong ___ 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 ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] dns-server in opts file doesn't work
Hi, experts: I tried to leverage opts file to modify the recursive dns server IP conveyed in RA. The entry in the opts file is shown below: tag:tag1,option6:dns-server,[2001:4860:4860::] I tcpdumped the outgoing RA message, but the dns server IP is still set to the IPv6 address dnsmasq bound to. However, if I use --dhcp-option=tag:tag1,option6:dns-server,[2001:4860:4860::]” as an option in the CLI, then it worked in the way as expected. Is there anything I did wrong in the opts file? It is still my preferred approach to use opts file. Thanks! Shixiong ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] Difference between SLAAC and RA-ONLY mode
Hi, guys: I tried both “slaac” mode and “ra-only” modes with dnsmasq version 2.66. One thing I noticed was, both modes set the same bit value in the RA: M-bit = 0, O-bit = 0, A-bit = 1, L-bit = 1. I am wondering what’s the difference between these two modes then? Would you please shed some light on it? Thanks! Shixiong ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Difference between SLAAC and RA-ONLY mode
Hi, Simon: Thanks a lot for your quick clarification! Just want to make sure I clearly understand what you mean….if the dhcp-range contains a range of IPv6 address, then slaac should enable dhcpv6 + ra; if the dhcp-range contains the single IPv6 address, then slack will only do ra, but not dhcpv6…..Same as ra-only. In other words, how slaac/ra-only set MOAL bits depends on dhcp-range…..Is my understanding correct? Shixiong On Dec 17, 2013, at 11:55 AM, Simon Kelley si...@thekelleys.org.uk wrote: On 17/12/13 12:29, Shixiong Shang wrote: Hi, guys: I tried both “slaac” mode and “ra-only” modes with dnsmasq version 2.66. One thing I noticed was, both modes set the same bit value in the RA: M-bit = 0, O-bit = 0, A-bit = 1, L-bit = 1. I am wondering what’s the difference between these two modes then? Would you please shed some light on it? There's no difference: slaac and ra-only have exactly the same effect. Reading back the manpage, the description is very confusing and should be re-written. The reason for having two different keywords is that they can be used with and without DHCP dhcp-range = 1234::1, 1234::100, slaac will do RA with MOAL bits all set, and provide DHCPv6 dhcp-range = 1234::1, slaac will do RA with only AL bits set, and not DHCP. It's maybe clearer to be able to be able to write. dhcp-range = 1234::1, ra-only in this case. Cheers, Simon. Thanks! Shixiong ___ 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 ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] IPv6 host file syntax
Hi, expert: I am using dnsmasq as DHCPv6 server and I created host file for my IPv6 DHCP range. The first field is DUID calculated by MAC, followed by hostname, and then IPv6 address. 00:03:00:06:fa:16:3e:03:63:36,host-2001-db8-3--1.openstacklocal,2001:db8:3::1 00:03:00:06:fa:16:3e:95:5f:6a,host-2001-db8-3--2.openstacklocal,2001:db8:3::2 00:03:00:06:fa:16:3e:0c:29:d6,host-2001-db8-3--f816-3eff-fe0c-29d6.openstacklocal,2001:db8:3::f816:3eff:fe0c:29d6 However, I cannot find any document to verify whether the above syntax is correct. Would you please clarify? Thanks! Shixiong ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] DHCPv6 default port
Hi, expert: I am using dnsmasq as DHCPv6 server. By default, dnsmasq is bound to port 53. I used --port option to bind it to UDP/547, since this is what my DHCPv6 client sends the query to. However, the dnsmasq never saw the DHCPv6 packets coming in afterwards. Based on tcpdump, I could see DHCPv6 packets hit dnsmasq binding interface, but dnsmasq log didn't report anything. So I am wondering whether the port other than 53 is supported? Thanks! Shixiong ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] DHCPv6 default port
I think dnsmasq process is bound to the right port, but it is not listening on udp6 part. Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp0 0 0.0.0.0:96970.0.0.0:* LISTEN 2103/python tcp6 0 0 2001:db8:3::1:547 :::*LISTEN 2536/dnsmasq tcp6 0 0 fe80::f816:3eff:fe0:547 :::*LISTEN 2536/dnsmasq tcp6 0 0 2001:db8:192:168::1:547 :::*LISTEN 2533/dnsmasq tcp6 0 0 fe80::f816:3eff:fe5:547 :::*LISTEN 2533/dnsmasq udp6 0 0 2001:db8:3::1:547 :::* 2536/dnsmasq udp6 0 0 fe80::f816:3eff:fe0:547 :::* 2536/dnsmasq udp6 0 0 2001:db8:192:168::1:547 :::* 2533/dnsmasq udp6 0 0 fe80::f816:3eff:fe5:547 :::* 2533/dnsmasq Shixiong On Dec 17, 2013, at 1:15 PM, Shixiong Shang sparkofwisdom.cl...@gmail.com wrote: Hi, expert: I am using dnsmasq as DHCPv6 server. By default, dnsmasq is bound to port 53. I used --port option to bind it to UDP/547, since this is what my DHCPv6 client sends the query to. However, the dnsmasq never saw the DHCPv6 packets coming in afterwards. Based on tcpdump, I could see DHCPv6 packets hit dnsmasq binding interface, but dnsmasq log didn't report anything. So I am wondering whether the port other than 53 is supported? Thanks! Shixiong ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] Dual stack host file format
Hi, I am trying to use dnsmasq to assign both IPv4 and IPv6 address in dual-stack environment. The dnsmasq was launched with several additional options: root 19991 19990 0 11:09 ?00:00:00 dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces --interface=ns-7f72b3ad-1a --except-interface=lo --pid-file=/var/lib/quantum/dhcp/81c3767a-d471-4433-8860-9a5ea20d4bd6/pid --dhcp-hostsfile=/var/lib/quantum/dhcp/81c3767a-d471-4433-8860-9a5ea20d4bd6/host --dhcp-optsfile=/var/lib/quantum/dhcp/81c3767a-d471-4433-8860-9a5ea20d4bd6/opts --dhcp-script=/usr/bin/quantum-dhcp-agent-dnsmasq-lease-update --leasefile-ro --enable-ra --port=547 --dhcp-range=set:tag0,2001:192:168:2::,slaac,120s --dhcp-range=set:tag1,192.168.2.0,static,120s --conf-file= --domain=openstacklocal Based on my reading of the threads on this forum, I believe the host file should be constructed like this.Do I really need bracket? Would you please confirm? dmd@net-network1:~$ more /var/lib/quantum/dhcp/81c3767a-d471-4433-8860-9a5ea20d4bd6/host fa:16:3e:95:23:89,192-168-2-3.openstacklocal,192.168.2.3,[2001:192:168:2::2] fa:16:3e:84:66:aa,192-168-2-1.openstacklocal,192.168.2.1,[2001:192:168:2::2] fa:16:3e:1b:18:93,192-168-2-2.openstacklocal,192.168.2.2,[2001:192:168:2::3] Thanks! Shixiong ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] DNSMasq doesn't see DHCPv6 Solicit msg
Hi, I am using DNSMasq to assign IPv6 address to client machine (Centos 6.4). Based on sniffer trace, I can see DHCP Solicit msg from client addressed to ff02::1:2 at UDP port 547: 11:18:25.140542 IP6 (hlim 1, next-header UDP (17) payload length: 60) fe80::f816:3eff:fe95:2389.546 ff02::1:2.547: [udp sum ok] dhcp6 solicit (xid=e14b62 (client-ID hwaddr/time type 1 time 428180465 fa163e952389) (option-request DNS-server DNS-search-list) (elapsed-time 1652) (IA_NA IAID:1049961353 T1:3600 T2:5400)) I changed the default configuration of dnsmasq and it is listening to port 547: root 19991 19990 0 11:09 ?00:00:00 dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces --interface=ns-7f72b3ad-1a --except-interface=lo --pid-file=/var/lib/quantum/dhcp/81c3767a-d471-4433-8860-9a5ea20d4bd6/pid --dhcp-hostsfile=/var/lib/quantum/dhcp/81c3767a-d471-4433-8860-9a5ea20d4bd6/host --dhcp-optsfile=/var/lib/quantum/dhcp/81c3767a-d471-4433-8860-9a5ea20d4bd6/opts --dhcp-script=/usr/bin/quantum-dhcp-agent-dnsmasq-lease-update --leasefile-ro --enable-ra --port=547 --dhcp-range=set:tag0,2001:192:168:2::,slaac,120s --dhcp-range=set:tag1,192.168.2.0,static,120s --conf-file= --domain=openstacklocal However, dnsmasq only saw IPv6 DHCP request from the VM, but not DHCPv6 Solicit msg. Is there anything I did wrong? Jul 29 11:25:34 net-network1 dnsmasq-dhcp[19990]: DHCPREQUEST(ns-7f72b3ad-1a) 192.168.2.3 fa:16:3e:95:23:89 Jul 29 11:25:34 net-network1 dnsmasq-dhcp[19990]: DHCPACK(ns-7f72b3ad-1a) 192.168.2.3 fa:16:3e:95:23:89 192-168-2-3 Jul 29 11:25:47 net-network1 dnsmasq-dhcp[19990]: RTR-ADVERT(ns-7f72b3ad-1a) 2001:192:168:2:: Jul 29 11:25:47 net-network1 dnsmasq-dhcp[19990]: RTR-ADVERT(ns-7f72b3ad-1a) 2001:192:168:2:: Jul 29 11:25:49 net-network1 dnsmasq-dhcp[19990]: RTR-SOLICIT(ns-7f72b3ad-1a) fa:16:3e:95:23:89 Jul 29 11:25:49 net-network1 dnsmasq-dhcp[19990]: RTR-ADVERT(ns-7f72b3ad-1a) 2001:192:168:2:: Jul 29 11:25:50 net-network1 dnsmasq-dhcp[19990]: DHCPREQUEST(ns-7f72b3ad-1a) 192.168.2.3 fa:16:3e:95:23:89 Jul 29 11:25:50 net-network1 dnsmasq-dhcp[19990]: DHCPACK(ns-7f72b3ad-1a) 192.168.2.3 fa:16:3e:95:23:89 192-168-2-3 Jul 29 11:25:53 net-network1 dnsmasq-dhcp[19990]: RTR-SOLICIT(ns-7f72b3ad-1a) fa:16:3e:95:23:89 Jul 29 11:25:53 net-network1 dnsmasq-dhcp[19990]: RTR-ADVERT(ns-7f72b3ad-1a) 2001:192:168:2:: Jul 29 11:25:57 net-network1 dnsmasq-dhcp[19990]: RTR-SOLICIT(ns-7f72b3ad-1a) fa:16:3e:95:23:89 Jul 29 11:25:57 net-network1 dnsmasq-dhcp[19990]: RTR-ADVERT(ns-7f72b3ad-1a) 2001:192:168:2:: Thanks! Shixiong ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
