Hi

I'm getting a bunch of errors and delayed network bring-up on my CentOS
7.4 system with NetworkManager version 1.8.0-11.el7_4.  I wonder if
anyone has any insight.

Mar 23 16:03:40 server.interlinx.bc.ca systemd[1]: Starting Network Manager...
Mar 23 16:03:40 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835420.7922] NetworkManager (version 1.8.0-11.el7_4) is starting... (for 
the first time)
Mar 23 16:03:40 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835420.7945] Read config: /etc/NetworkManager/NetworkManager.conf (lib: 
10-slaves-order.conf)
Mar 23 16:03:40 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835420.8646] manager[0x55fd41c880c0]: monitoring kernel firmware directory 
'/lib/firmware'.
Mar 23 16:03:40 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835420.8677] policy: hostname management mode: default
Mar 23 16:03:40 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835420.8690] dns-mgr[0x55fd41c90150]: init: dns=default, rc-manager=file
Mar 23 16:03:40 server.interlinx.bc.ca systemd[1]: Started Network Manager.
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.1253] settings: loaded plugin ifcfg-rh: (c) 2007 - 2015 Red Hat, 
Inc.  To report bugs please use the NetworkManager mailing list. 
(/usr/lib64/NetworkManager/libnm-settings-plugin-ifcfg-rh.so)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.1355] settings: loaded plugin iBFT: (c) 2014 Red Hat, Inc.  To 
report bugs please use the NetworkManager mailing list. 
(/usr/lib64/NetworkManager/libnm-settings-plugin-ibft.so)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.1356] settings: loaded plugin keyfile: (c) 2007 - 2016 Red Hat, 
Inc.  To report bugs please use the NetworkManager mailing list.
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.1416] ifcfg-rh: new connection 
/etc/sysconfig/network-scripts/ifcfg-enp2s0 
(90f5409c-bd23-48f2-b03f-325333198827,"enp2s0")
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <warn>  
[1521835421.1435] ifcfg-rh: loading 
"/etc/sysconfig/network-scripts/ifcfg-eth0:1" fails: File 
'/etc/sysconfig/network-scripts/ifcfg-eth0:1' had neither TYPE nor DEVICE keys.
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6112] settings: hostname: using hostnamed
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6117] settings: hostname changed from (none) to 
"server.interlinx.bc.ca"
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6148] dhcp-init: Using DHCP client 'dhclient'
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6149] manager: rfkill: WiFi enabled by radio killswitch; enabled by 
state file
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6149] manager: rfkill: WWAN enabled by radio killswitch; enabled by 
state file
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6149] manager: Networking is enabled by state file
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6298] Loaded device plugin: NMBondDeviceFactory (internal)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6299] Loaded device plugin: NMBridgeDeviceFactory (internal)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6299] Loaded device plugin: NMDummyDeviceFactory (internal)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6299] Loaded device plugin: NMEthernetDeviceFactory (internal)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6299] Loaded device plugin: NMInfinibandDeviceFactory (internal)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6300] Loaded device plugin: NMIPTunnelDeviceFactory (internal)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6300] Loaded device plugin: NMMacsecDeviceFactory (internal)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6341] Loaded device plugin: NMMacvlanDeviceFactory (internal)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6341] Loaded device plugin: NMTunDeviceFactory (internal)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6341] Loaded device plugin: NMVethDeviceFactory (internal)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6342] Loaded device plugin: NMVlanDeviceFactory (internal)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6342] Loaded device plugin: NMVxlanDeviceFactory (internal)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6768] Loaded device plugin: NMTeamFactory 
(/usr/lib64/NetworkManager/libnm-device-plugin-team.so)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.6916] device (lo): link connected
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.7061] manager: (lo): new Generic device 
(/org/freedesktop/NetworkManager/Devices/1)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.7276] manager: (enp2s0): new Ethernet device 
(/org/freedesktop/NetworkManager/Devices/2)
Mar 23 16:03:41 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835421.7496] device (enp2s0): state change: unmanaged -> unavailable 
(reason 'managed') [10 20 2]
Mar 23 16:03:44 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835424.8105] device (enp2s0): link connected
Mar 23 16:03:44 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835424.8239] device (enp2s0): state change: unavailable -> disconnected 
(reason 'carrier-changed') [20 30 40]
Mar 23 16:03:44 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835424.8450] policy: auto-activating connection 'enp2s0'
Mar 23 16:03:44 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835424.8581] device (enp2s0): Activation: starting connection 'enp2s0' 
(90f5409c-bd23-48f2-b03f-325333198827)
Mar 23 16:03:44 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835424.8618] device (enp2s0): state change: disconnected -> prepare 
(reason 'none') [30 40 0]
Mar 23 16:03:44 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835424.8666] manager: NetworkManager state is now CONNECTING
Mar 23 16:03:44 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835424.8770] device (enp2s0): state change: prepare -> config (reason 
'none') [40 50 0]
Mar 23 16:03:46 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835426.1894] device (enp2s0): state change: config -> ip-config (reason 
'none') [50 70 0]
Mar 23 16:03:47 server.interlinx.bc.ca NetworkManager[989]: <error> 
[1521835427.2411] platform-linux: do-change-link[2]: failure changing link: 
failure 22 (Invalid argument)
Mar 23 16:04:17 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835457.1985] device (enp2s0): state change: ip-config -> failed (reason 
'ip-config-unavailable') [70 120 5]
Mar 23 16:04:17 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835457.1991] manager: NetworkManager state is now DISCONNECTED
Mar 23 16:04:17 server.interlinx.bc.ca NetworkManager[989]: <warn>  
[1521835457.1995] device (enp2s0): Activation: failed for connection 'enp2s0'
Mar 23 16:04:17 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835457.2002] device (enp2s0): state change: failed -> disconnected (reason 
'none') [120 30 0]
Mar 23 16:04:17 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835457.2486] policy: auto-activating connection 'enp2s0'
Mar 23 16:04:17 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835457.2581] device (enp2s0): Activation: starting connection 'enp2s0' 
(90f5409c-bd23-48f2-b03f-325333198827)
Mar 23 16:04:17 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835457.2617] device (enp2s0): state change: disconnected -> prepare 
(reason 'none') [30 40 0]
Mar 23 16:04:17 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835457.2646] manager: NetworkManager state is now CONNECTING
Mar 23 16:04:17 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835457.2697] device (enp2s0): state change: prepare -> config (reason 
'none') [40 50 0]
Mar 23 16:04:17 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835457.3615] device (enp2s0): state change: config -> ip-config (reason 
'none') [50 70 0]
Mar 23 16:04:19 server.interlinx.bc.ca NetworkManager[989]: <error> 
[1521835459.1711] platform-linux: do-change-link[2]: failure changing link: 
failure 22 (Invalid argument)
Mar 23 16:04:49 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835489.2075] device (enp2s0): state change: ip-config -> failed (reason 
'ip-config-unavailable') [70 120 5]
Mar 23 16:04:49 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835489.2082] manager: NetworkManager state is now DISCONNECTED
Mar 23 16:04:49 server.interlinx.bc.ca NetworkManager[989]: <warn>  
[1521835489.2086] device (enp2s0): Activation: failed for connection 'enp2s0'
Mar 23 16:04:49 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835489.2094] device (enp2s0): state change: failed -> disconnected (reason 
'none') [120 30 0]
Mar 23 16:04:49 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835489.2629] policy: auto-activating connection 'enp2s0'
Mar 23 16:04:49 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835489.2755] device (enp2s0): Activation: starting connection 'enp2s0' 
(90f5409c-bd23-48f2-b03f-325333198827)
Mar 23 16:04:49 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835489.2775] device (enp2s0): state change: disconnected -> prepare 
(reason 'none') [30 40 0]
Mar 23 16:04:49 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835489.2808] manager: NetworkManager state is now CONNECTING
Mar 23 16:04:49 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835489.2873] device (enp2s0): state change: prepare -> config (reason 
'none') [40 50 0]
Mar 23 16:04:49 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835489.3727] device (enp2s0): state change: config -> ip-config (reason 
'none') [50 70 0]
Mar 23 16:04:50 server.interlinx.bc.ca NetworkManager[989]: <error> 
[1521835490.9131] platform-linux: do-change-link[2]: failure changing link: 
failure 22 (Invalid argument)
Mar 23 16:05:21 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835521.2128] device (enp2s0): state change: ip-config -> failed (reason 
'ip-config-unavailable') [70 120 5]
Mar 23 16:05:21 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835521.2186] manager: NetworkManager state is now DISCONNECTED
Mar 23 16:05:21 server.interlinx.bc.ca NetworkManager[989]: <warn>  
[1521835521.2203] device (enp2s0): Activation: failed for connection 'enp2s0'
Mar 23 16:05:21 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835521.2312] device (enp2s0): state change: failed -> disconnected (reason 
'none') [120 30 0]
Mar 23 16:05:21 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835521.2967] policy: auto-activating connection 'enp2s0'
Mar 23 16:05:21 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835521.3046] device (enp2s0): Activation: starting connection 'enp2s0' 
(90f5409c-bd23-48f2-b03f-325333198827)
Mar 23 16:05:21 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835521.3077] device (enp2s0): state change: disconnected -> prepare 
(reason 'none') [30 40 0]
Mar 23 16:05:21 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835521.3106] manager: NetworkManager state is now CONNECTING
Mar 23 16:05:21 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835521.3173] device (enp2s0): state change: prepare -> config (reason 
'none') [40 50 0]
Mar 23 16:05:21 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835521.3701] device (enp2s0): state change: config -> ip-config (reason 
'none') [50 70 0]
Mar 23 16:05:22 server.interlinx.bc.ca NetworkManager[989]: <error> 
[1521835522.4523] platform-linux: do-change-link[2]: failure changing link: 
failure 22 (Invalid argument)
Mar 23 16:05:53 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835553.2125] device (enp2s0): state change: ip-config -> failed (reason 
'ip-config-unavailable') [70 120 5]
Mar 23 16:05:53 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835553.2128] manager: NetworkManager state is now DISCONNECTED
Mar 23 16:05:53 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835553.2130] policy: disabling autoconnect for connection 'enp2s0'.
Mar 23 16:05:53 server.interlinx.bc.ca NetworkManager[989]: <warn>  
[1521835553.2133] device (enp2s0): Activation: failed for connection 'enp2s0'
Mar 23 16:05:53 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835553.2139] device (enp2s0): state change: failed -> disconnected (reason 
'none') [120 30 0]
Mar 23 16:05:53 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835553.2599] manager: startup complete
Mar 23 16:05:53 server.interlinx.bc.ca NetworkManager[989]: <warn>  
[1521835553.8995] ifcfg-rh: loading 
"/etc/sysconfig/network-scripts/ifcfg-eth0:1" fails: File 
'/etc/sysconfig/network-scripts/ifcfg-eth0:1' had neither TYPE nor DEVICE keys.
Mar 23 16:05:54 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835554.6517] device (enp2s0): Activation: starting connection 'enp2s0' 
(90f5409c-bd23-48f2-b03f-325333198827)
Mar 23 16:05:54 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835554.6533] audit: op="connection-activate" 
uuid="90f5409c-bd23-48f2-b03f-325333198827" name="enp2s0" pid=2348 uid=0 
result="success"
Mar 23 16:05:54 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835554.6557] device (enp2s0): state change: disconnected -> prepare 
(reason 'none') [30 40 0]
Mar 23 16:05:54 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835554.6595] manager: NetworkManager state is now CONNECTING
Mar 23 16:05:54 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835554.6643] device (enp2s0): state change: prepare -> config (reason 
'none') [40 50 0]
Mar 23 16:05:54 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835554.7159] device (enp2s0): state change: config -> ip-config (reason 
'none') [50 70 0]
Mar 23 16:06:27 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835587.2055] device (enp2s0): state change: ip-config -> failed (reason 
'ip-config-unavailable') [70 120 5]
Mar 23 16:06:27 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835587.2060] manager: NetworkManager state is now DISCONNECTED
Mar 23 16:06:27 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835587.2062] policy: disabling autoconnect for connection 'enp2s0'.
Mar 23 16:06:27 server.interlinx.bc.ca NetworkManager[989]: <warn>  
[1521835587.2065] device (enp2s0): Activation: failed for connection 'enp2s0'
Mar 23 16:06:27 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835587.2072] device (enp2s0): state change: failed -> disconnected (reason 
'none') [120 30 0]
Mar 23 16:10:21 server.interlinx.bc.ca NetworkManager[989]: <warn>  
[1521835821.3401] ifcfg-rh: loading 
"/etc/sysconfig/network-scripts/ifcfg-eth0:1" fails: File 
'/etc/sysconfig/network-scripts/ifcfg-eth0:1' had neither TYPE nor DEVICE keys.
Mar 23 16:10:30 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835830.6672] device (enp2s0): Activation: starting connection 'enp2s0' 
(90f5409c-bd23-48f2-b03f-325333198827)
Mar 23 16:10:30 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835830.6906] audit: op="connection-activate" 
uuid="90f5409c-bd23-48f2-b03f-325333198827" name="enp2s0" pid=5148 uid=0 
result="success"
Mar 23 16:10:30 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835830.7076] device (enp2s0): state change: disconnected -> prepare 
(reason 'none') [30 40 0]
Mar 23 16:10:30 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835830.7296] manager: NetworkManager state is now CONNECTING
Mar 23 16:10:30 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835830.7470] device (enp2s0): state change: prepare -> config (reason 
'none') [40 50 0]
Mar 23 16:10:31 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835831.3550] device (enp2s0): state change: config -> ip-config (reason 
'none') [50 70 0]
Mar 23 16:11:03 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835863.1975] device (enp2s0): state change: ip-config -> failed (reason 
'ip-config-unavailable') [70 120 5]
Mar 23 16:11:03 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835863.1983] manager: NetworkManager state is now DISCONNECTED
Mar 23 16:11:03 server.interlinx.bc.ca NetworkManager[989]: <warn>  
[1521835863.2088] device (enp2s0): Activation: failed for connection 'enp2s0'
Mar 23 16:11:03 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835863.2198] device (enp2s0): state change: failed -> disconnected (reason 
'none') [120 30 0]
Mar 23 16:11:03 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835863.4421] policy: auto-activating connection 'enp2s0'
Mar 23 16:11:03 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835863.4975] device (enp2s0): Activation: starting connection 'enp2s0' 
(90f5409c-bd23-48f2-b03f-325333198827)
Mar 23 16:11:03 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835863.4982] device (enp2s0): state change: disconnected -> prepare 
(reason 'none') [30 40 0]
Mar 23 16:11:03 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835863.4987] manager: NetworkManager state is now CONNECTING
Mar 23 16:11:03 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835863.5165] device (enp2s0): state change: prepare -> config (reason 
'none') [40 50 0]
Mar 23 16:11:04 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835864.1006] device (enp2s0): state change: config -> ip-config (reason 
'none') [50 70 0]
Mar 23 16:11:06 server.interlinx.bc.ca NetworkManager[989]: <error> 
[1521835866.0312] platform-linux: do-change-link[2]: failure changing link: 
failure 22 (Invalid argument)
Mar 23 16:11:36 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835896.2019] device (enp2s0): state change: ip-config -> failed (reason 
'ip-config-unavailable') [70 120 5]
Mar 23 16:11:36 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835896.2027] manager: NetworkManager state is now DISCONNECTED
Mar 23 16:11:36 server.interlinx.bc.ca NetworkManager[989]: <warn>  
[1521835896.2031] device (enp2s0): Activation: failed for connection 'enp2s0'
Mar 23 16:11:36 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835896.2089] device (enp2s0): state change: failed -> disconnected (reason 
'none') [120 30 0]
Mar 23 16:11:36 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835896.3683] policy: auto-activating connection 'enp2s0'
Mar 23 16:11:36 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835896.4036] device (enp2s0): Activation: starting connection 'enp2s0' 
(90f5409c-bd23-48f2-b03f-325333198827)
Mar 23 16:11:36 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835896.4042] device (enp2s0): state change: disconnected -> prepare 
(reason 'none') [30 40 0]
Mar 23 16:11:36 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835896.4179] manager: NetworkManager state is now CONNECTING
Mar 23 16:11:36 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835896.4410] device (enp2s0): state change: prepare -> config (reason 
'none') [40 50 0]
Mar 23 16:11:36 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835896.8329] device (enp2s0): state change: config -> ip-config (reason 
'none') [50 70 0]
Mar 23 16:11:38 server.interlinx.bc.ca NetworkManager[989]: <error> 
[1521835898.5731] platform-linux: do-change-link[2]: failure changing link: 
failure 22 (Invalid argument)
Mar 23 16:12:09 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835929.2015] device (enp2s0): state change: ip-config -> failed (reason 
'ip-config-unavailable') [70 120 5]
Mar 23 16:12:09 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835929.2023] manager: NetworkManager state is now DISCONNECTED
Mar 23 16:12:09 server.interlinx.bc.ca NetworkManager[989]: <warn>  
[1521835929.2058] device (enp2s0): Activation: failed for connection 'enp2s0'
Mar 23 16:12:09 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835929.2087] device (enp2s0): state change: failed -> disconnected (reason 
'none') [120 30 0]
Mar 23 16:12:09 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835929.3547] policy: auto-activating connection 'enp2s0'
Mar 23 16:12:09 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835929.4097] device (enp2s0): Activation: starting connection 'enp2s0' 
(90f5409c-bd23-48f2-b03f-325333198827)
Mar 23 16:12:09 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835929.4103] device (enp2s0): state change: disconnected -> prepare 
(reason 'none') [30 40 0]
Mar 23 16:12:09 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835929.4107] manager: NetworkManager state is now CONNECTING
Mar 23 16:12:09 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835929.4305] device (enp2s0): state change: prepare -> config (reason 
'none') [40 50 0]
Mar 23 16:12:09 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835929.8979] device (enp2s0): state change: config -> ip-config (reason 
'none') [50 70 0]
Mar 23 16:12:11 server.interlinx.bc.ca NetworkManager[989]: <error> 
[1521835931.4593] platform-linux: do-change-link[2]: failure changing link: 
failure 22 (Invalid argument)
Mar 23 16:12:28 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835948.6500] dhcp6 (enp2s0): activation: beginning transaction (timeout in 
45 seconds)
Mar 23 16:12:28 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835948.7608] dhcp6 (enp2s0): dhclient started with pid 6143
Mar 23 16:12:29 server.interlinx.bc.ca dhclient[6143]: XMT: Solicit on enp2s0, 
interval 1040ms.
Mar 23 16:12:31 server.interlinx.bc.ca dhclient[6143]: XMT: Solicit on enp2s0, 
interval 2040ms.
Mar 23 16:12:33 server.interlinx.bc.ca dhclient[6143]: XMT: Solicit on enp2s0, 
interval 3970ms.
Mar 23 16:12:37 server.interlinx.bc.ca dhclient[6143]: XMT: Solicit on enp2s0, 
interval 7560ms.
Mar 23 16:12:44 server.interlinx.bc.ca dhclient[6143]: XMT: Solicit on enp2s0, 
interval 14880ms.
Mar 23 16:12:59 server.interlinx.bc.ca dhclient[6143]: XMT: Solicit on enp2s0, 
interval 30800ms.
Mar 23 16:13:14 server.interlinx.bc.ca NetworkManager[989]: <warn>  
[1521835994.1932] dhcp6 (enp2s0): request timed out
Mar 23 16:13:14 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835994.1937] dhcp6 (enp2s0): state changed unknown -> timeout
Mar 23 16:13:14 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835994.2021] dhcp6 (enp2s0): canceled DHCP transaction, DHCP client pid 
6143
Mar 23 16:13:14 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835994.2022] dhcp6 (enp2s0): state changed timeout -> done
Mar 23 16:13:14 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835994.2695] device (enp2s0): state change: ip-config -> ip-check (reason 
'none') [70 80 0]
Mar 23 16:13:14 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835994.3196] device (enp2s0): state change: ip-check -> secondaries 
(reason 'none') [80 90 0]
Mar 23 16:13:14 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835994.3348] device (enp2s0): state change: secondaries -> activated 
(reason 'none') [90 100 0]
Mar 23 16:13:14 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835994.3353] manager: NetworkManager state is now CONNECTED_LOCAL
Mar 23 16:13:14 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835994.4009] manager: NetworkManager state is now CONNECTED_SITE
Mar 23 16:13:14 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835994.4011] policy: set 'enp2s0' (enp2s0) as default for IPv4 routing and 
DNS
Mar 23 16:13:14 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835994.4011] policy: set 'enp2s0' (enp2s0) as default for IPv6 routing and 
DNS
Mar 23 16:13:14 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835994.4335] device (enp2s0): Activation: successful, device activated.
Mar 23 16:13:14 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521835994.4487] manager: NetworkManager state is now CONNECTED_GLOBAL
Mar 23 16:21:39 server.interlinx.bc.ca NetworkManager[989]: <info>  
[1521836499.3293] policy: set 'enp2s0' (enp2s0) as default for IPv4 routing and 
DNS

There seems to be repeated failures and delays with:

platform-linux: do-change-link[2]: failure changing link: failure 22 (Invalid 
argument)

But I'm not sure what it's trying to tell me.

Any ideas?

Cheers,
b.

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