Hi All - I have a box running the above. Power was lost long enough that UPS did not work. When power came back on the C7 box boots way faster than the switch and resulted in no network. power cycling the C7 box resulted in network.
This even happened a second time. The only way to get the box back was to power cycle. the box is remote and no keyboard and mouse connected.
Any thoughts on why the e1000e would not talk to the switch ? The switch is an unmanaged linksys - could not get the model. It auto negotiates to 1G/full.
Thanks, for any thoughts.
Jerry
On 7/7/2017 7:00 PM, Jerry Geis wrote:
Hi All - I have a box running the above. Power was lost long enough that UPS did not work. When power came back on the C7 box boots way faster than the switch and resulted in no network. power cycling the C7 box resulted in network.
an unmanaged switch should be live within milliseconds of power being applied, it doesn't make sense that an OS could boot up before its working.
On Fri, Jul 07, 2017 at 10:00:17PM -0400, Jerry Geis wrote:
Hi All - I have a box running the above. Power was lost long enough that UPS did not work. When power came back on the C7 box boots way faster than the switch and resulted in no network. power cycling the C7 box resulted in network.
/usr/share/doc/initscripts-9.49.37/sysconfig.txt ... /etc/sysconfig/network-scripts/ifcfg-<interface-name> and ... LINKDELAY=<time in seconds> Time that the system should pause after the specific interface is enabled. This may be useful if one interface is connected to a switch which has spanning tree enabled and must wait for STP to converge before the interface should be considered usable. ...
Tru
On Jul 7, 2017, at 10:00 PM, Jerry Geis jerry.geis@gmail.com wrote:
Hi All - I have a box running the above. Power was lost long enough that UPS did not work. When power came back on the C7 box boots way faster than the switch and resulted in no network. power cycling the C7 box resulted in network.
Do you use NetworkManager or the network sysv service?
-- Jonathan Billings billings@negate.org
On Jul 8, 2017, at 7:45 AM, Jerry Geis jerry.geis@gmail.com wrote:
Do you use NetworkManager or the network sysv service?
I use the sysv service
Had you used NetworkManager, it would have detected the network coming up and started networking. This is one of the reasons why I continue to use NM for our servers, I’ve been in similar situations (where power is restored to the rack with computers in it before to the rack with the networking equipment). The ‘network’ sysv service just runs once and gives up if it can’t bring up the network.
The problem with LINKDELAY= is that it will always slow down the network service (even if the network is fine), and if you set it too high, might cause other services which rely on it to time out.
-- Jonathan Billings billings@negate.org
This may be the wrong approach, but install the NetworkManager-config-server rpm. It sets a config option to allow interfaces to be configured before being available, which may help.
On 07/08/2017 07:45 AM, Jerry Geis wrote:
Do you use NetworkManager or the network sysv service?
I use the sysv service Thanks,
Jerry _______________________________________________ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
What I did on couple of my CentOS boxes is: - use a bridge which is connected to the specific nic(will always look as up after boot) - Run a cron script that checks if the nic state is "NO-CARRIER" or other weird situations like no IP address and try to run ifdown X-nic and then ifup X-nic.
Depends on the hardware and situation you might need to choose what fits youe environment as a solution instead of fixing the whole CentOS distro.
All The Bests, Eliezer
---- Eliezer Croitoru Linux System Administrator Mobile: +972-5-28704261 Email: eliezer@ngtech.co.il
-----Original Message----- From: CentOS [mailto:centos-bounces@centos.org] On Behalf Of Jerry Geis Sent: Saturday, July 8, 2017 05:00 To: CentOS mailing list centos@centos.org Subject: [CentOS] CentOS 7.3 and e1000e
Hi All - I have a box running the above. Power was lost long enough that UPS did not work. When power came back on the C7 box boots way faster than the switch and resulted in no network. power cycling the C7 box resulted in network.
This even happened a second time. The only way to get the box back was to power cycle. the box is remote and no keyboard and mouse connected.
Any thoughts on why the e1000e would not talk to the switch ? The switch is an unmanaged linksys - could not get the model. It auto negotiates to 1G/full.
Thanks, for any thoughts.
Jerry _______________________________________________ CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
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Eliezer Croitoru -
Jerry Geis -
John Jasen -
John R Pierce -
Jonathan Billings -
Tru Huynh