[Dnsmasq-discuss] Dnsmasq 2.68 not assign IPv6 address, error -- no addresses available
Da Zhao Y Yu
dzyu at cn.ibm.com
Fri Feb 14 08:46:34 GMT 2014
More investigate about this issue:
I found the dnsmasq dhcp client id is generated by client MAC address, but
the dhcp server id is not generated by the binding tap interface(
tap1a82f5d5-e9) MAC address. Base on the server id (
00:03:00:01:00:0a:f7:1d:70:5c), I found it is generated by another network
device, the MAC address(0a:f7:1d:70:5c) is matched with eth4 in my env,
and also eth4 device is in "inactive" status, I do not know the root
cause.
For IPv4, the client can got the IP address, just on IPv6 case, have such
issues.
--------------------------------------------------
From: Da Zhao Y Yu/China/IBM at IBMCN
To: Dnsmasq-discuss at lists.thekelleys.org.uk,
Date: 2014/02/14 12:04
Subject: Re: [Dnsmasq-discuss] Dnsmasq 2.68 not assign IPv6
address, error -- no addresses available
Sent by: dnsmasq-discuss-bounces at lists.thekelleys.org.uk
After add '--log-dhcp' in dnsmasq, more log in /var/log/message, as below:
Feb 13 21:56:29 x3650m4-ir10-7915j2a-06nrrh8 dnsmasq-dhcp[3610]: 16372489
available DHCPv6 subnet: 2011:2011:0:f101::/64
Feb 13 21:56:29 x3650m4-ir10-7915j2a-06nrrh8 dnsmasq-dhcp[3610]: 16372489
client MAC address: fa:16:3e:99:c6:54
Feb 13 21:56:29 x3650m4-ir10-7915j2a-06nrrh8 dnsmasq-dhcp[3610]: 16372489
DHCPSOLICIT(tap1a82f5d5-e9) 00:01:00:01:1a:90:4c:42:fa:16:3e:99:c6:54
Feb 13 21:56:29 x3650m4-ir10-7915j2a-06nrrh8 dnsmasq-dhcp[3610]: 16372489
DHCPADVERTISE(tap1a82f5d5-e9) 00:01:00:01:1a:90:4c:42:fa:16:3e:99:c6:54 no
addresses available
Feb 13 21:56:29 x3650m4-ir10-7915j2a-06nrrh8 dnsmasq-dhcp[3610]: 16372489
tags: known, dhcpv6, tap1a82f5d5-e9
Feb 13 21:56:29 x3650m4-ir10-7915j2a-06nrrh8 dnsmasq-dhcp[3610]: 16372489
sent size: 14 option: 1 client-id
00:01:00:01:1a:90:4c:42:fa:16:3e:99:c6:54
Feb 13 21:56:29 x3650m4-ir10-7915j2a-06nrrh8 dnsmasq-dhcp[3610]: 16372489
sent size: 10 option: 2 server-id 00:03:00:01:00:0a:f7:1d:70:5c
Feb 13 21:56:29 x3650m4-ir10-7915j2a-06nrrh8 dnsmasq-dhcp[3610]: 16372489
sent size: 12 option: 3 ia-na IAID=1050265172 T1=4294967295
T2=4294967295
Feb 13 21:56:29 x3650m4-ir10-7915j2a-06nrrh8 dnsmasq-dhcp[3610]: 16372489
sent size: 24 option: 13 status 2 no addresses available
Any help would be appricated, thanks!!!
-------------------------------------------------
Cloud Solutions & OpenStack Development
China Systems & Technology Laboratory in Beijing
Email: dzyu at cn.ibm.com
Tel: (86)10-82450677
--------------------------------------------------
From: Da Zhao Y Yu/China/IBM
To: Dnsmasq-discuss at lists.thekelleys.org.uk,
Date: 2014/02/13 18:23
Subject: Dnsmasq 2.68 not assign IPv6 address, error -- no
addresses available
Hi all,
Today I used dnsmasq 2.68 as dhcpv6 server to assign IP address to vm
instance, and encountered the following issue:
1, The dnsmasq process as below:
/usr/sbin/dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces
--interface=tap1a82f5d5-e9 --except-interface=lo
--pid-file=/var/lib/neutron/dhcp/a5d2bd6f-4509-483d-97df-66582e86b661/pid
--dhcp-hostsfile=/var/lib/neutron/dhcp/a5d2bd6f-4509-483d-97df-66582e86b661/host
--dhcp-optsfile=/var/lib/neutron/dhcp/a5d2bd6f-4509-483d-97df-66582e86b661/opts
--leasefile-ro --dhcp-range=set:tag0,2011:2011:0:f101::,static,86400s
--dhcp-lease-max=16777216
2, In ubuntu vm instance, I use dhclient -6 to send request, and in
controller node, use tcpdump -i tap1a82f5d5-e9 to monitor the result, as
below:
tcpdump: WARNING: tap1a82f5d5-e9: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on tap1a82f5d5-e9, link-type EN10MB (Ethernet), capture size
65535 bytes
04:02:04.230789 IP6 fe80::f816:3eff:fe41:b297.dhcpv6-client >
ff02::1:2.dhcpv6-server: dhcp6 solicit
04:02:04.232872 IP6 fe80::d046:83ff:fec3:cd10 > ff02::1:ff41:b297: ICMP6,
neighbor solicitation, who has fe80::f816:3eff:fe41:b297, length 32
04:02:04.233682 IP6 fe80::f816:3eff:fe41:b297 > fe80::d046:83ff:fec3:cd10:
ICMP6, neighbor advertisement, tgt is fe80::f816:3eff:fe41:b297, length 32
04:02:04.233702 IP6 fe80::d046:83ff:fec3:cd10 > fe80::f816:3eff:fe41:b297:
ICMP6, neighbor solicitation, who has fe80::f816:3eff:fe41:b297, length 24
04:02:04.234124 IP6 fe80::f816:3eff:fe41:b297 > fe80::d046:83ff:fec3:cd10:
ICMP6, neighbor advertisement, tgt is fe80::f816:3eff:fe41:b297, length 24
04:02:04.331231 IP6 fe80::d046:83ff:fec3:cd10.dhcpv6-server >
fe80::f816:3eff:fe41:b297.dhcpv6-client: dhcp6 advertise
04:02:05.301072 IP6 fe80::f816:3eff:fe41:b297.dhcpv6-client >
ff02::1:2.dhcpv6-server: dhcp6 solicit
04:02:05.301173 IP6 fe80::d046:83ff:fec3:cd10.dhcpv6-server >
fe80::f816:3eff:fe41:b297.dhcpv6-client: dhcp6 advertise
It seems the network request have been sent from vm instance, and dhcpv6
server also got the message, but the vm instance still can not get the
special IPv6 address, also from /var/log/message, I saw the dsnmasq error
message:
dnsmasq-dhcp[24313]: read
/var/lib/neutron/dhcp/a5d2bd6f-4509-483d-97df-66582e86b661/host
dnsmasq-dhcp[24313]: read
/var/lib/neutron/dhcp/a5d2bd6f-4509-483d-97df-66582e86b661/opts
dnsmasq-dhcp[24313]: DHCPSOLICIT(tap1a82f5d5-e9)
00:01:00:01:1a:8f:54:b6:fa:16:3e:41:b2:97
dnsmasq-dhcp[24313]: DHCPADVERTISE(tap1a82f5d5-e9)
00:01:00:01:1a:8f:54:b6:fa:16:3e:41:b2:97 no addresses available
dnsmasq-dhcp[24313]: DHCPSOLICIT(tap1a82f5d5-e9)
00:01:00:01:1a:8f:54:b6:fa:16:3e:41:b2:97
dnsmasq-dhcp[24313]: DHCPADVERTISE(tap1a82f5d5-e9)
00:01:00:01:1a:8f:54:b6:fa:16:3e:41:b2:97 no addresses available
I do not know how to fix this issue, so can you give me some help about
it, thanks!
Thanks & Best Regards
Yu Da Zhao(于大钊)
--------------------------------------------------
Cloud Solutions & OpenStack Development
China Systems & Technology Laboratory in Beijing
Email: dzyu at cn.ibm.com
Tel: (86)10-82450677
--------------------------------------------------
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