Oracle Linux: The Network Failed When the Server Booted Up (Doc ID 2328891.1)

Last updated on MAY 21, 2020

Applies to:

Symptoms

For a server running on Oracle Linux 7，the network failed to come up with the host IP address and the necessary route not being set.

The following messages were logged to /var/log/messages:

Oct 2 09:28:46 localhost dhclient[100064]: DHCPDISCOVER on eth0 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 13 (xid=0x6d1ae174)
Oct 2 09:28:54 localhost dhclient[100064]: DHCPDISCOVER on eth1 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 12 (xid=0x44a40460)
Oct 2 09:28:59 localhost dhclient[100064]: DHCPDISCOVER on eth0 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 9 (xid=0x6d1ae174)
Oct 2 09:29:01 localhost systemd: Created slice user-0.slice.
Oct 2 09:29:01 localhost systemd: Starting user-0.slice.
Oct 2 09:29:01 localhost systemd: Started Session 8761 of user root.
Oct 2 09:29:01 localhost systemd: Starting Session 8761 of user root.
Oct 2 09:29:01 localhost systemd: Removed slice user-0.slice.
Oct 2 09:29:01 localhost systemd: Stopping user-0.slice.
Oct 2 09:29:06 localhost dhclient[100064]: DHCPDISCOVER on eth1 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 2 (xid=0x44a40460)
Oct 2 09:29:08 localhost dhclient[100064]: No DHCPOFFERS received.
Oct 2 09:29:08 localhost dhclient[100064]: No working leases in persistent database - sleeping.
Oct 2 09:29:08 localhost systemd: Cannot add dependency job for unit microcode.service, ignoring: Unit is not loaded properly: Invalid argument.
Oct 2 09:29:08 localhost systemd: Starting LSB: Bring up/down networking...
Oct 2 09:29:08 localhost systemd: Cannot add dependency job for unit microcode.service, ignoring: Unit is not loaded properly: Invalid argument.
Oct 2 09:29:08 localhost systemd: start request repeated too quickly for network.service
Oct 2 09:29:08 localhost systemd: Failed to start LSB: Bring up/down networking.
Oct 2 09:29:08 localhost systemd: Unit network.service entered failed state.
Oct 2 09:29:08 localhost systemd: network.service failed.
Oct 2 09:29:08 localhost network: Restarting network (via systemctl): Job for network.service failed because start of the service was attempted too often. See "systemctl status network.service" and "journalctl -xe" for details.

Running dhclient in verbose mode also returned the following:

# dhclient -v
Internet Systems Consortium DHCP Client 4.2.5
Copyright 2004-2013 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Restarting network (via systemctl): Job for network.service failed because start of the service was attempted too often. See "systemctl status network.service" and "journalctl -xe" for details.
To force a start use "systemctl reset-failed network.service" followed by "systemctl start network.service" again.
[FAILED]
Restarting network (via systemctl): Job for network.service failed because start of the service was attempted too often. See "systemctl status network.service" and "journalctl -xe" for details.
To force a start use "systemctl reset-failed network.service" followed by "systemctl start network.service" again.
[FAILED]
Listening on LPF/eth1/XX:XX:XX:XX:XX:XX
Sending on LPF/eth1/XX:XX:XX:XX:XX:XX
Listening on LPF/eth0/YY:YY:YY:YY:YY:YY
Sending on LPF/eth0/YY:YY:YY:YY:YY:YY
Sending on Socket/fallback
DHCPDISCOVER on eth1 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 6 (xid=0x44a40460)
DHCPDISCOVER on eth0 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 4 (xid=0x6d1ae174)
DHCPDISCOVER on eth0 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 8 (xid=0x6d1ae174)
DHCPDISCOVER on eth1 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 10 (xid=0x44a40460)
DHCPDISCOVER on eth0 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 14 (xid=0x6d1ae174)
DHCPDISCOVER on eth1 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 14 (xid=0x44a40460)
DHCPDISCOVER on eth0 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 13 (xid=0x6d1ae174)
DHCPDISCOVER on eth1 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 17 (xid=0x44a40460)
DHCPDISCOVER on eth0 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 13 (xid=0x6d1ae174)
DHCPDISCOVER on eth1 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 12 (xid=0x44a40460)
DHCPDISCOVER on eth0 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 9 (xid=0x6d1ae174)
DHCPDISCOVER on eth1 to ZZZ.ZZZ.ZZZ.ZZZ port 67 interval 2 (xid=0x44a40460)
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
Restarting network (via systemctl): Job for network.service failed because start of the service was attempted too often. See "systemctl status network.service" and "journalctl -xe" for details.
To force a start use "systemctl reset-failed network.service" followed by "systemctl start network.service" again.
[FAILED]
/usr/sbin/dhclient-script: line 311: resolv_restore: command not found

Changes

Cause

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