Package: isc-dhcp-client Version: 4.2.2.dfsg.1-5+deb70u6 Severity: major My server's dhclient regularly dies (every few days or weeks) with the fatal error message "Impossible condition at dhc6.c:4111."
It is started with dhclient -cf /etc/dhcp/dhclient.conf -6 -P -v eth0 The config file is as follows: ### cut after ### option rfc3442-classless-static-routes code 121 = array of unsigned integer 8; send dhcp6.client-id 00:30:00:01:de:ad:be:ef:f0:01; send host-name = gethostname(); request subnet-mask, broadcast-address, time-offset, routers, domain-name, domain-name-servers, domain-search, host-name, dhcp6.name-servers, dhcp6.domain-search, netbios-name-servers, netbios-scope, interface-mtu, rfc3442-classless-static-routes, ntp-servers; ### cut before ### Here is some typical log output (with the -v option, see above), starting with "normal" recurring messages, and ending with the fatal error message in question: Apr 21 09:21:45 achernar dhclient: PRC: Renewing lease on eth0. Apr 21 09:21:45 achernar dhclient: XMT: Renew on eth0, interval 10690ms. Apr 21 09:21:53 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 09:21:53 achernar dhclient: IA_PD status code Success: "Prefix(es) renewed." Apr 21 10:21:53 achernar dhclient: PRC: Renewing lease on eth0. Apr 21 10:21:53 achernar dhclient: XMT: Renew on eth0, interval 10180ms. Apr 21 10:21:53 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 10:21:53 achernar dhclient: IA_PD status code NoBinding: "Who are you? Do I know you?" Apr 21 10:21:53 achernar dhclient: XMT: Request on eth0, interval 930ms. Apr 21 10:21:54 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 10:21:54 achernar dhclient: IA_PD status code Success: "Assigned fixed out-of-pool address." Apr 21 11:21:54 achernar dhclient: PRC: Renewing lease on eth0. Apr 21 11:21:54 achernar dhclient: XMT: Renew on eth0, interval 10270ms. Apr 21 11:21:54 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 11:21:54 achernar dhclient: IA_PD status code NoBinding: "Who are you? Do I know you?" Apr 21 11:21:54 achernar dhclient: XMT: Request on eth0, interval 1030ms. Apr 21 11:21:54 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 11:21:54 achernar dhclient: IA_PD status code Success: "Assigned fixed out-of-pool address." Apr 21 12:21:54 achernar dhclient: PRC: Renewing lease on eth0. Apr 21 12:21:54 achernar dhclient: XMT: Renew on eth0, interval 9770ms. Apr 21 12:21:55 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 12:21:55 achernar dhclient: IA_PD status code NoBinding: "Who are you? Do I know you?" Apr 21 12:21:55 achernar dhclient: XMT: Request on eth0, interval 1030ms. Apr 21 12:21:55 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 12:21:55 achernar dhclient: IA_PD status code Success: "Assigned fixed out-of-pool address." Apr 21 13:21:55 achernar dhclient: PRC: Renewing lease on eth0. Apr 21 13:21:55 achernar dhclient: XMT: Renew on eth0, interval 10630ms. Apr 21 13:22:03 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 13:22:03 achernar dhclient: IA_PD status code Success: "Prefix(es) renewed." Apr 21 14:22:03 achernar dhclient: PRC: Renewing lease on eth0. Apr 21 14:22:03 achernar dhclient: XMT: Renew on eth0, interval 9930ms. Apr 21 14:22:09 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 14:22:09 achernar dhclient: IA_PD status code Success: "Prefix(es) renewed." Apr 21 15:22:09 achernar dhclient: PRC: Renewing lease on eth0. Apr 21 15:22:09 achernar dhclient: XMT: Renew on eth0, interval 10200ms. Apr 21 15:22:19 achernar dhclient: XMT: Renew on eth0, interval 21320ms. Apr 21 15:22:20 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 15:22:20 achernar dhclient: IA_PD status code NoBinding: "Who are you? Do I know you?" Apr 21 15:22:20 achernar dhclient: XMT: Request on eth0, interval 960ms. Apr 21 15:22:30 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 15:22:30 achernar dhclient: Packet received, but nothing done with it. Apr 21 15:22:31 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 15:22:31 achernar dhclient: IA_PD status code Success: "Assigned fixed out-of-pool address." Apr 21 16:22:31 achernar dhclient: PRC: Renewing lease on eth0. Apr 21 16:22:31 achernar dhclient: XMT: Renew on eth0, interval 10380ms. Apr 21 16:22:32 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 16:22:32 achernar dhclient: IA_PD status code NoBinding: "Who are you? Do I know you?" Apr 21 16:22:32 achernar dhclient: XMT: Request on eth0, interval 990ms. Apr 21 16:22:32 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 16:22:32 achernar dhclient: IA_PD status code Success: "Assigned fixed out-of-pool address." Apr 21 17:22:32 achernar dhclient: PRC: Renewing lease on eth0. Apr 21 17:22:32 achernar dhclient: XMT: Renew on eth0, interval 9450ms. Apr 21 17:22:38 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 17:22:38 achernar dhclient: IA_PD status code NoBinding: "Who are you? Do I know you?" Apr 21 17:22:38 achernar dhclient: XMT: Request on eth0, interval 930ms. Apr 21 17:22:46 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 17:22:46 achernar dhclient: IA_PD status code Success: "Assigned fixed out-of-pool address." Apr 21 18:22:46 achernar dhclient: PRC: Renewing lease on eth0. Apr 21 18:22:46 achernar dhclient: XMT: Renew on eth0, interval 10290ms. Apr 21 18:22:56 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 18:22:56 achernar dhclient: IA_PD status code Success: "Prefix(es) renewed." Apr 21 19:22:56 achernar dhclient: PRC: Renewing lease on eth0. Apr 21 19:22:56 achernar dhclient: XMT: Renew on eth0, interval 9470ms. Apr 21 19:23:06 achernar dhclient: XMT: Renew on eth0, interval 18030ms. Apr 21 19:23:08 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 19:23:08 achernar dhclient: IA_PD status code NoBinding: "Who are you? Do I know you?" Apr 21 19:23:08 achernar dhclient: XMT: Request on eth0, interval 1090ms. Apr 21 19:23:17 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 19:23:17 achernar dhclient: Packet received, but nothing done with it. Apr 21 19:23:19 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 19:23:19 achernar dhclient: IA_PD status code Success: "Assigned fixed out-of-pool address." Apr 21 20:23:19 achernar dhclient: PRC: Renewing lease on eth0. Apr 21 20:23:19 achernar dhclient: XMT: Renew on eth0, interval 10970ms. Apr 21 20:23:30 achernar dhclient: XMT: Renew on eth0, interval 21330ms. Apr 21 20:23:43 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 20:23:43 achernar dhclient: IA_PD status code NoBinding: "Who are you? Do I know you?" Apr 21 20:23:43 achernar dhclient: XMT: Request on eth0, interval 1060ms. Apr 21 20:26:39 achernar dhclient: PRC: Prefix 2001:bc8:30e8::/48 depreferred. Apr 21 20:26:39 achernar dhclient: Impossible condition at dhc6.c:4111. I don't know why I regularly get NoBinding status codes, nor whether this has something to do with the problem. Also here are the normal startup messages: Apr 21 22:38:25 achernar dhclient: Internet Systems Consortium DHCP Client 4.2.2 Apr 21 22:38:25 achernar dhclient: Copyright 2004-2011 Internet Systems Consortium. Apr 21 22:38:25 achernar dhclient: All rights reserved. Apr 21 22:38:25 achernar dhclient: For info, please visit https://www.isc.org/software/dhcp/ Apr 21 22:38:25 achernar dhclient: Apr 21 22:38:26 achernar dhclient: Bound to *:546 Apr 21 22:38:26 achernar dhclient: Listening on Socket/eth0 Apr 21 22:38:26 achernar dhclient: Sending on Socket/eth0 Apr 21 22:38:27 achernar dhclient: XMT: Rebind on eth0, interval 1010ms. Apr 21 22:38:27 achernar dhclient: send_packet6: Network is unreachable Apr 21 22:38:27 achernar dhclient: dhc6: send_packet6() sent -1 of 77 bytes Apr 21 22:38:28 achernar dhclient: XMT: Rebind on eth0, interval 2030ms. Apr 21 22:38:28 achernar dhclient: send_packet6: Network is unreachable Apr 21 22:38:28 achernar dhclient: dhc6: send_packet6() sent -1 of 77 bytes Apr 21 22:38:30 achernar dhclient: XMT: Rebind on eth0, interval 3650ms. Apr 21 22:38:33 achernar dhclient: XMT: Rebind on eth0, interval 6960ms. Apr 21 22:38:40 achernar dhclient: PRC: Prefix 2001:bc8:30e8::/48 depreferred. Apr 21 22:38:40 achernar dhclient: PRC: Prefix 2001:bc8:30e8::/48 expired. Apr 21 22:38:40 achernar dhclient: PRC: Bound lease is devoid of active addresses. Re-initializing. Apr 21 22:38:41 achernar dhclient: XMT: Solicit on eth0, interval 1060ms. Apr 21 22:38:42 achernar dhclient: XMT: Solicit on eth0, interval 2080ms. Apr 21 22:38:42 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 22:38:42 achernar dhclient: Packet received, but nothing done with it. Apr 21 22:38:44 achernar dhclient: XMT: Solicit on eth0, interval 4360ms. Apr 21 22:38:49 achernar dhclient: XMT: Solicit on eth0, interval 8650ms. Apr 21 22:38:57 achernar dhclient: RCV: Advertise message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 22:38:57 achernar dhclient: IA_PD status code Success: "Assigned fixed out-of-pool address." Apr 21 22:38:57 achernar dhclient: XMT: Request on eth0, interval 1060ms. Apr 21 22:38:58 achernar dhclient: XMT: Request on eth0, interval 2220ms. Apr 21 22:39:01 achernar dhclient: XMT: Request on eth0, interval 4590ms. Apr 21 22:39:05 achernar dhclient: XMT: Request on eth0, interval 9090ms. Apr 21 22:39:10 achernar dhclient: RCV: Reply message on eth0 from fe80::8a43:e1ff:fe7c:7bff. Apr 21 22:39:10 achernar dhclient: IA_PD status code Success: "Assigned fixed out-of-pool address." Tell me whether I can do something to help debug this. Also please tell me if this is the sort of bugs that are liable to get fixed in Debian stable. -- David A. Madore ( http://www.madore.org/~david/ ) -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org