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152 | ===================================================
/etc/network/interfaces (on pc)
===================================================
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
auto enp0s25
iface enp0s25 inet static
address 10.0.0.1
netmask 255.255.255.0
dns-nameservers 8.8.8.8
===================================================
/etc/network/interfaces (on pi)
===================================================
pi3:~$ cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
# Please note that this file is written to be used with dhcpcd
# For static IP, consult /etc/dhcpcd.conf and 'man dhcpcd.conf'
# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d
auto lo
iface lo inet loopback
iface eth0 inet manual
auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-ssid "xxx"
wpa-psk "xxx"
allow-hotplug wlan1
iface wlan1 inet manual
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
===================================================
syslog grep for DHCP
===================================================
Apr 3 15:55:43 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:00:43 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:00:43 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:05:43 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:05:43 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:10:43 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:10:44 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:15:44 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:15:44 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:20:44 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:20:44 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:25:44 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:25:44 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:30:44 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:30:44 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:35:44 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:35:44 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:40:44 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:40:45 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:45:45 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:45:45 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:50:45 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:50:45 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:55:45 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 16:55:45 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:00:45 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:00:45 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:05:45 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:05:45 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:10:45 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:10:46 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:15:46 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:15:46 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:20:10 deansw530 dhclient[30890]: Internet Systems Consortium DHCP Client 4.3.3
Apr 3 17:20:23 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:20:23 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:25:28 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:25:28 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:30:28 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:30:28 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:31:41 deansw530 dhclient[31458]: Internet Systems Consortium DHCP Client 4.3.3
Apr 3 17:31:56 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:31:56 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 via enp0s25
Apr 3 17:36:18 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 via enp0s25
Apr 3 17:36:18 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:41:18 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:41:18 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:46:18 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:46:18 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:51:18 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:51:19 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
===================================================
syslog (all lines) before, during, and after address loss
===================================================
Apr 3 17:36:18 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 via enp0s25
Apr 3 17:36:18 deansw530 dhcpd[22454]: ns1.example.org: host unknown.
Apr 3 17:36:18 deansw530 dhcpd[22454]: ns2.example.org: host unknown.
Apr 3 17:36:18 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:41:18 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:41:18 deansw530 dhcpd[22454]: ns1.example.org: host unknown.
Apr 3 17:41:18 deansw530 dhcpd[22454]: ns2.example.org: host unknown.
Apr 3 17:41:18 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:43:12 deansw530 kloc-daemon[1333]: running update with includeTimeLog=0
Apr 3 17:43:12 deansw530 kloc-daemon[1333]: update with includeTimeLog=0 completed in 0.211926447 seconds
Apr 3 17:45:01 deansw530 CRON[32131]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Apr 3 17:46:18 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:46:18 deansw530 dhcpd[22454]: ns1.example.org: host unknown.
Apr 3 17:46:18 deansw530 dhcpd[22454]: ns2.example.org: host unknown.
Apr 3 17:46:18 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:51:18 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:51:19 deansw530 dhcpd[22454]: ns1.example.org: host unknown.
Apr 3 17:51:19 deansw530 dhcpd[22454]: ns2.example.org: host unknown.
Apr 3 17:51:19 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:55:01 deansw530 CRON[32434]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Apr 3 17:56:19 deansw530 dhcpd[22454]: DHCPREQUEST for 10.0.0.200 from b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:56:19 deansw530 dhcpd[22454]: ns1.example.org: host unknown.
Apr 3 17:56:19 deansw530 dhcpd[22454]: ns2.example.org: host unknown.
Apr 3 17:56:19 deansw530 dhcpd[22454]: DHCPACK on 10.0.0.200 to b8:27:eb:aa:bc:c9 (pi3) via enp0s25
Apr 3 17:58:12 deansw530 kloc-daemon[1333]: running update with includeTimeLog=0
Apr 3 17:58:12 deansw530 kloc-daemon[1333]: update with includeTimeLog=0 completed in 0.199784617 seconds
Apr 3 18:00:27 deansw530 kernel: [21651.784172] e1000e: enp0s25 NIC Link is Down
Apr 3 18:00:32 deansw530 dhclient[32685]: Internet Systems Consortium DHCP Client 4.3.3
Apr 3 18:00:32 deansw530 dhclient[32685]: Copyright 2004-2015 Internet Systems Consortium.
Apr 3 18:00:32 deansw530 dhclient[32685]: All rights reserved.
Apr 3 18:00:32 deansw530 dhclient[32685]: For info, please visit https://www.isc.org/software/dhcp/
Apr 3 18:00:32 deansw530 dhclient[32685]:
Apr 3 18:00:32 deansw530 dhclient[32685]: Listening on LPF/enp0s25/3c:97:0e:53:c9:f9
Apr 3 18:00:32 deansw530 dhclient[32685]: Sending on LPF/enp0s25/3c:97:0e:53:c9:f9
Apr 3 18:00:32 deansw530 dhclient[32685]: Sending on Socket/fallback
Apr 3 18:00:32 deansw530 avahi-daemon[950]: Withdrawing address record for 10.0.0.1 on enp0s25.
Apr 3 18:00:32 deansw530 avahi-daemon[950]: Leaving mDNS multicast group on interface enp0s25.IPv4 with address 10.0.0.1.
Apr 3 18:00:32 deansw530 avahi-daemon[950]: Interface enp0s25.IPv4 no longer relevant for mDNS.
Apr 3 18:00:32 deansw530 avahi-daemon[950]: Interface enp0s25.IPv6 no longer relevant for mDNS.
Apr 3 18:00:32 deansw530 avahi-daemon[950]: Leaving mDNS multicast group on interface enp0s25.IPv6 with address fe80::3e97:eff:fe53:c9f9.
Apr 3 18:00:32 deansw530 dhcpd[22454]: receive_packet failed on enp0s25: Network is down
Apr 3 18:00:32 deansw530 avahi-daemon[950]: Withdrawing address record for fe80::3e97:eff:fe53:c9f9 on enp0s25.
Apr 3 18:00:32 deansw530 kernel: [21656.580833] e1000e: enp0s25 NIC Link is Down
Apr 3 18:00:32 deansw530 kernel: [21656.816354] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
Apr 3 18:00:35 deansw530 kernel: [21659.810221] e1000e: enp0s25 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
Apr 3 18:00:35 deansw530 kernel: [21659.810270] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s25: link becomes ready
Apr 3 18:00:37 deansw530 avahi-daemon[950]: Joining mDNS multicast group on interface enp0s25.IPv6 with address fe80::3e97:eff:fe53:c9f9.
Apr 3 18:00:37 deansw530 avahi-daemon[950]: New relevant interface enp0s25.IPv6 for mDNS.
Apr 3 18:00:37 deansw530 avahi-daemon[950]: Registering new address record for fe80::3e97:eff:fe53:c9f9 on enp0s25.*.
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