Perda de IPv4 e DHCP constantemente pedindo IP

Question

Usando o Ubuntu 16.04, quase todos os dias eu estou perdendo o endereço IPv4, sendo descartado pelo Avahi Daemon.

Além disso, vejo que o DHCP não está "aguardando" que o tempo de leasing termine de solicitar um endereço novamente, ele faz isso a cada alguns minutos, mas não consigo ver um padrão.

Então, de repente e sem nenhum erro anterior, o Avahi Daemon retira o IP da interface eth0:

Aug 11 11:55:14 jorgee avahi-daemon[2734]: Withdrawing address record for 192.168.2.94 on eth0.

Esta é a última parte do syslog.

Aug 11 11:43:11 jorgee systemd[1]: Started Automatically refresh installed snaps.
Aug 11 11:43:11 jorgee systemd[1]: snapd.refresh.timer: Adding 4h 33min 5.892892s random time.
Aug 11 11:43:11 jorgee systemd[1]: snapd.refresh.timer: Adding 48min 39.947211s random time.
Aug 11 11:43:13 jorgee dbus[2803]: [system] Reloaded configuration
Aug 11 11:44:04 jorgee dhclient[12492]: DHCPREQUEST of 192.168.2.94 on eth0 to 192.168.2.254 port 67 (xid=0x188018e6)
Aug 11 11:44:04 jorgee dhclient[12492]: DHCPACK of 192.168.2.94 from 192.168.2.254
Aug 11 11:44:04 jorgee root: /etc/dhcp/dhclient-enter-hooks.d/avahi-autoipd returned non-zero exit status 1
Aug 11 11:44:05 jorgee dhclient[12492]: bound to 192.168.2.94 -- renewal in 800 seconds.
Aug 11 11:46:15 jorgee dhclient[12636]: DHCPREQUEST of 192.168.2.94 on eth0 to 192.168.2.254 port 67 (xid=0x51cc22fc)
Aug 11 11:46:15 jorgee dhclient[12636]: DHCPACK of 192.168.2.94 from 192.168.2.254
Aug 11 11:46:15 jorgee root: /etc/dhcp/dhclient-enter-hooks.d/avahi-autoipd returned non-zero exit status 1
Aug 11 11:46:15 jorgee dhclient[12636]: bound to 192.168.2.94 -- renewal in 758 seconds.
Aug 11 11:47:33 jorgee dhclient[12712]: DHCPREQUEST of 192.168.2.94 on eth0 to 192.168.2.254 port 67 (xid=0x6788bfce)
Aug 11 11:47:33 jorgee dhclient[12712]: DHCPACK of 192.168.2.94 from 192.168.2.254
Aug 11 11:47:33 jorgee root: /etc/dhcp/dhclient-enter-hooks.d/avahi-autoipd returned non-zero exit status 1
Aug 11 11:47:33 jorgee dhclient[12712]: bound to 192.168.2.94 -- renewal in 746 seconds.
Aug 11 11:49:08 jorgee systemd-timesyncd[12709]: Timed out waiting for reply from 192.168.2.254:123 (192.168.2.254).
Aug 11 11:52:42 jorgee dhclient[14855]: DHCPREQUEST of 192.168.2.94 on eth0 to 192.168.2.254 port 67 (xid=0x41dfce98)
Aug 11 11:52:42 jorgee dhclient[14855]: DHCPACK of 192.168.2.94 from 192.168.2.254
Aug 11 11:52:42 jorgee dhclient[14855]: bound to 192.168.2.94 -- renewal in 703 seconds.
Aug 11 11:54:16 jorgee dhclient[12677]: DHCPREQUEST of 192.168.2.94 on eth0 to 192.168.2.254 port 67 (xid=0x7456460e)
Aug 11 11:54:16 jorgee dhclient[12677]: DHCPACK of 192.168.2.94 from 192.168.2.254
Aug 11 11:54:16 jorgee root: /etc/dhcp/dhclient-enter-hooks.d/avahi-autoipd returned non-zero exit status 1
Aug 11 11:54:17 jorgee dhclient[12677]: bound to 192.168.2.94 -- renewal in 770 seconds.
Aug 11 11:55:14 jorgee avahi-daemon[2734]: Withdrawing address record for 192.168.2.94 on eth0.
Aug 11 11:55:14 jorgee avahi-daemon[2734]: Leaving mDNS multicast group on interface eth0.IPv4 with address 192.168.2.94.
Aug 11 11:55:14 jorgee avahi-daemon[2734]: Interface eth0.IPv4 no longer relevant for mDNS.
Aug 11 11:55:16 jorgee whoopsie[2731]: [11:55:16] Cannot reach: https://daisy.ubuntu.com
Aug 11 11:55:16 jorgee whoopsie[2731]: [11:55:16] offline
Aug 11 11:56:14 jorgee sudo: pam_ecryptfs: pam_sm_authenticate: /home/jorgee is already mounted
Aug 11 11:56:34 jorgee dhclient[11554]: DHCPREQUEST of 192.168.2.94 on eth0 to 192.168.2.254 port 67 (xid=0x2894ec32)
Aug 11 11:56:34 jorgee dhclient[11554]: send_packet: Network is unreachable
Aug 11 11:56:34 jorgee dhclient[11554]: send_packet: please consult README file regarding broadcast address.
Aug 11 11:56:34 jorgee dhclient[11554]: dhclient.c:2386: Failed to send 300 byte long packet over fallback interface.
Aug 11 11:56:37 jorgee dhclient[11554]: DHCPREQUEST of 192.168.2.94 on eth0 to 192.168.2.254 port 67 (xid=0x2894ec32)
Aug 11 11:56:37 jorgee dhclient[11554]: send_packet: Network is unreachable
Aug 11 11:56:37 jorgee dhclient[11554]: send_packet: please consult README file regarding broadcast address.
Aug 11 11:56:37 jorgee dhclient[11554]: dhclient.c:2386: Failed to send 300 byte long packet over fallback interface.
Aug 11 11:56:42 jorgee dhclient[11554]: DHCPREQUEST of 192.168.2.94 on eth0 to 192.168.2.254 port 67 (xid=0x2894ec32)
Aug 11 11:56:42 jorgee dhclient[11554]: send_packet: Network is unreachable
Aug 11 11:56:42 jorgee dhclient[11554]: send_packet: please consult README file regarding broadcast address.
Aug 11 11:56:42 jorgee dhclient[11554]: dhclient.c:2386: Failed to send 300 byte long packet over fallback interface.

Editar:

Configuração do Bind9:

acl lan {
    127.0.0.0/8;
    192.168.0.0/16;
};

view "lan-dmz" {
        match-clients { key lan-dmz; !key wan; lan; };
        server 192.168.1.24 { keys lan-dmz; };
        allow-recursion {lan; };
        recursion yes;
        zone "aaaa.edu.ar" {
        type master;
        file "/var/cache/bind/aaaa.edu.ar.lan-dmz";
};
        zone "aaaa.local" IN {
        type forward;
        forwarders { 192.168.1.123; 192.168.1.124;};
        };

};
view "wan" {
        match-clients { key wan; !key lan-dmz; !lan; any; };
        server 192.168.1.24 { keys wan; };
        recursion no;
        zone "aaaa.edu.ar" {
        type master;
    allow-transfer { 192.168.1.24; 170.210.44.2; 170.210.44.3; };
        allow-query { any; };
        also-notify { 192.168.1.24; 170.210.44.2; 170.210.44.3; };
        file "/var/cache/bind/aaaa.edu.ar.wan";


};
};

    

Answer 1

Parece que o script de configuração do avhi-autoipd está falhando. Isso resulta nos gostos de log como este.

Aug 11 11:54:16 jorgee root: /etc/dhcp/dhclient-enter-hooks.d/avahi-autoipd returned non-zero exit status 1

Isso provavelmente é tratado como uma falha na conexão e faz com que o DHCP tente novamente após um tempo limite. É provável que o comando /usr/sbin/avahi-autoipd -k $interface esteja falhando. Tente executar este comando com o valor apropriado para $interface . Você pode precisar reinstalar ou limpar o pacote avahi-autoipd .