Re: NetworkManager behavior answers not found in docs

[Thomas HUMMEL <thomas hummel pasteur fr>]

> Generally, there are the device states "unmanaged" -> "unavailable" ->
> and "disconnected". For ethernet devices, a device is usually
> "unavailable" because it has no carrier.

As a matter of fact, when no udev rules for NM_UNMANAGED, the device is 
in the disconnected state.

As for the traces, here's what I've got :

Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <debug> 
[1540550644.5859] ifcfg-rh: loading from file 
"/etc/sysconfig/network-scripts/ifcfg-eth0"...
Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <debug> 
[1540550644.5861] settings-connection[0x7fbffc006890]: constructed 
(NMIfcfgConnection)
Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <trace> 
[1540550644.5870] 
settings-connection[0x7fbffc006890,5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03]: 
update settings-connection flags to visible (was none)
Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <debug> 
[1540550644.5875] 
settings-connection[0x7fbffc006890,5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03]: 
disposing
Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <trace> 
[1540550644.5878] 
settings-connection[0x7fbffc006890,5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03]: 
update settings-connection flags to none (was visible)
Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <trace> 
[1540550644.6729] platform-linux: event-notification: RTM_NEWROUTE, 
flags 0, seq 1540550645: ignore
Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <trace> 
[1540550644.6752] platform-linux: event-notification: RTM_NEWROUTE, 
flags 0, seq 1540550645: ignore
Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <trace> 
[1540550644.6771] platform-linux: event-notification: RTM_NEWROUTE, 
flags 0, seq 1540550645: ignore
Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <trace> 
[1540550644.6790] platform-linux: event-notification: RTM_NEWROUTE, 
flags 0, seq 1540550645: ignore
Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <trace> 
[1540550644.6809] platform-linux: event-notification: RTM_NEWROUTE, 
flags 0, seq 1540550645: ignore
Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <trace> 
[1540550644.6827] platform-linux: event-notification: RTM_NEWROUTE, 
flags 0, seq 1540550645: ignore
Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <trace> 
[1540550644.6845] platform-linux: event-notification: RTM_NEWROUTE, 
flags 0, seq 1540550645: ignore
Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <trace> 
[1540550644.6865] platform-linux: event-notification: RTM_NEWROUTE, 
flags 0, seq 1540550645: ignore
Oct 26 12:44:04 xcat-myriad NetworkManager[606]: <trace> 
[1540550644.6883] platform-linux: event-notification: RTM_NEWROUTE, 
flags 0, seq 1540550645: ignore
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <trace> 
[1540550823.0031] device[0x55a73f560c80] (eth1): sys-iface-state: 
external -> assume
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <debug> 
[1540550823.0033] device[0x55a73f560c80] (eth1): unmanaged: flags set to 
[user-udev,!sleeping,!loopback,!platform-init,!user-explicit,!user-settings=0x400/0x479/managed],
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <info> 
[1540550823.0033] device (eth1): state change: unmanaged -> unavailable 
(reason 'connection-assumed', sys-iface-state: 'assume')
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <debug> 
[1540550823.0034] platform-linux: sysctl: reading 
'/proc/sys/net/ipv6/conf/eth1/accept_ra': '1'
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <debug> 
[1540550823.0035] platform-linux: sysctl: reading 
'/proc/sys/net/ipv6/conf/eth1/accept_ra_defrtr': '1'
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <debug> 
[1540550823.0035] platform-linux: sysctl: reading 
'/proc/sys/net/ipv6/conf/eth1/accept_ra_pinfo': '1'
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <debug> 
[1540550823.0035] platform-linux: sysctl: reading 
'/proc/sys/net/ipv6/conf/eth1/accept_ra_rtr_pref': '1'
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <debug> 
[1540550823.0036] platform-linux: sysctl: reading 
'/proc/sys/net/ipv6/conf/eth1/forwarding': '0'
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <debug> 
[1540550823.0036] platform-linux: sysctl: reading 
'/proc/sys/net/ipv6/conf/eth1/disable_ipv6': '1'
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <debug> 
[1540550823.0036] platform-linux: sysctl: reading 
'/proc/sys/net/ipv6/conf/eth1/hop_limit': '64'
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <debug> 
[1540550823.0037] platform-linux: sysctl: reading 
'/proc/sys/net/ipv6/conf/eth1/use_tempaddr': '0'
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <debug> 
[1540550823.0039] device[0x55a73f560c80] (eth1): device not yet 
available for transition to DISCONNECTED
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <debug> 
[1540550823.0041] create NMAuditManager singleton (0x7fbffc00d0f0)
Oct 26 12:47:03 xcat-myriad NetworkManager[606]: <info> 
[1540550823.0042] audit: op="device-managed" arg="managed:1" pid=1360 
uid=0 result="success"

corresponding to those actions :

# ip link show eth1
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode 
DEFAULT group default qlen 1000
    link/ether 00:50:56:8a:42:bf brd ff:ff:ff:ff:ff:ff
# nmcli -f GENERAL.NM-MANAGED device show eth1
GENERAL.NM-MANAGED:                     no
# nmcli -f GENERAL.STATE device show eth1
GENERAL.STATE:                          10 (unmanaged)
# nmcli device set eth1 managed yes
# nmcli -f GENERAL.NM-MANAGED device show eth1
GENERAL.NM-MANAGED:                     yes
# nmcli -f GENERAL.STATE device show eth1
GENERAL.STATE:                          20 (unavailable)

Thanks

--
Thomas



> best,
> Thomas