[Users] host goes to non-operational because interface down message

[Gianluca Cecchi]

Hello,
I have a newly created datacenter in 3.2.1 with f18 host where
ovirtmgmt is set as vlan.
host is installed but after some minutes I get this messages:

Host management02 moved to Non-Operational state because interfaces
'em1.311' are down but are needed by networks 'ovirtmgmt' in the
current cluster


from an operating system point of view it seems that all is ok on the host

[root at management02 ~]# ip addr list
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:15:17:b4:99:3c brd ff:ff:ff:ff:ff:ff
3: em2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:15:17:b4:99:3d brd ff:ff:ff:ff:ff:ff
    inet 213.205.41.202/26 brd 213.205.41.255 scope global em2
4: em1.311 at em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
noqueue master ovirtmgmt state UP
    link/ether 00:15:17:b4:99:3c brd ff:ff:ff:ff:ff:ff
5: ovirtmgmt: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
    link/ether 00:15:17:b4:99:3c brd ff:ff:ff:ff:ff:ff
    inet 10.39.71.12/26 brd 10.39.71.63 scope global ovirtmgmt
7: ;vdsmdummy;: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
    link/ether 36:98:c3:39:5f:43 brd ff:ff:ff:ff:ff:ff
8: bond0: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
9: bond4: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
10: bond1: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
11: bond2: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
12: bond3: <BROADCAST,MULTICAST,MASTER> mtu 1500 qdisc noop state DOWN
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff

[root at management02 ~]# ethtool em1
Settings for em1:
    Supported ports: [ FIBRE ]
    Supported link modes:   1000baseT/Full
    Supported pause frame use: No
    Supports auto-negotiation: Yes
    Advertised link modes:  1000baseT/Full
    Advertised pause frame use: Symmetric
    Advertised auto-negotiation: Yes
    Speed: 1000Mb/s
    Duplex: Full
    Port: FIBRE
    PHYAD: 0
    Transceiver: internal
    Auto-negotiation: on
    Supports Wake-on: pumbg
    Wake-on: g
    Current message level: 0x00000007 (7)
                   drv probe link
    Link detected: yes
[root at management02 ~]# ethtool em1.311
Settings for em1.311:
    Supported ports: [ FIBRE ]
    Supported link modes:   1000baseT/Full
    Supported pause frame use: No
    Supports auto-negotiation: Yes
    Advertised link modes:  1000baseT/Full
    Advertised pause frame use: Symmetric
    Advertised auto-negotiation: Yes
    Speed: 1000Mb/s
    Duplex: Full
    Port: FIBRE
    PHYAD: 0
    Transceiver: internal
    Auto-negotiation: on
    Link detected: yes


On engine
[root at management01 ~]# ip addr list
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
2: em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:15:17:b1:1f:e8 brd ff:ff:ff:ff:ff:ff
3: em2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:15:17:b1:1f:e9 brd ff:ff:ff:ff:ff:ff
    inet 213.205.41.201/26 brd 213.205.41.255 scope global em2
4: em1.192 at em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
noqueue state UP
    link/ether 00:15:17:b1:1f:e8 brd ff:ff:ff:ff:ff:ff
    inet 192.168.230.1/24 brd 192.168.230.255 scope global em1.192
5: em1.311 at em1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
noqueue state UP
    link/ether 00:15:17:b1:1f:e8 brd ff:ff:ff:ff:ff:ff
    inet 10.39.71.11/26 brd 10.39.71.63 scope global em1.311


[root at management01 ~]# ethtool em1
Settings for em1:
    Supported ports: [ FIBRE ]
    Supported link modes:   1000baseT/Full
    Supported pause frame use: No
    Supports auto-negotiation: Yes
    Advertised link modes:  1000baseT/Full
    Advertised pause frame use: Symmetric
    Advertised auto-negotiation: Yes
    Speed: 1000Mb/s
    Duplex: Full
    Port: FIBRE
    PHYAD: 0
    Transceiver: internal
    Auto-negotiation: on
    Supports Wake-on: pumbg
    Wake-on: g
    Current message level: 0x00000007 (7)
                   drv probe link
    Link detected: yes
[root at management01 ~]# ethtool em1.311
Settings for em1.311:
    Supported ports: [ FIBRE ]
    Supported link modes:   1000baseT/Full
    Supported pause frame use: No
    Supports auto-negotiation: Yes
    Advertised link modes:  1000baseT/Full
    Advertised pause frame use: Symmetric
    Advertised auto-negotiation: Yes
    Speed: 1000Mb/s
    Duplex: Full
    Port: FIBRE
    PHYAD: 0
    Transceiver: internal
    Auto-negotiation: on
    Link detected: yes

what can be the cause?
what is the check that runs and move the host to non-operational?
Thanks
Gianluca