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Top Forums UNIX for Dummies Questions & Answers Network monitoring at boot level. Post 302586730 by pinga123 on Tuesday 3rd of January 2012 05:43:01 AM
Old 01-03-2012
Quote:
Originally Posted by vbe
OK..
So how is the network interface configured?
If GB both sides have to be in autodetect
If 100MB then force both sides to FD
Most time it is due to getting the swith port and lan card to agree on speed and HD/FD...

Funny you mention this... I have a server lost in the country side that need rebooting after some crazy power failure test operation where we loose connection... To me the switch takes more time than the server, and the server not finding network believes he is a standalone and so gives up inet configuration... and as you say it used to work till a few months ago

CISCO stuff?
The interfaces are at auto negotiate @both end i.e server and switch.1000gb
There is a delay in creating LACP establishment (@server end its LACP mode 4).
@Switch end they enabled port fast and spanning tree protocol is disabled.


Yes its CISCO stuff Smilie
 

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IFSERVICES(5)						       Network configuration						     IFSERVICES(5)

NAME
ifservices-* - control network services with ifup/down SYNOPSIS
/etc/sysconfig/network/ifservices-<configuration_name>/ DESCRIPTION
The directory /etc/sysconfig/network/ifservices-<configuration_name>/ is read by the script /etc/sysconfig/network/scripts/ifup-services which starts and stops system services when an interface is set up/down. ifup-services is used by /sbin/ifup, which is the command line user interface for setting up network interfaces. This is useful if you don't have a permanent network connection. If you sometimes boot without network and plug in the network cable later you can add links to system services in this directory. These services will then be started with ifup and stopped with ifdown. The configuration name used for ifservices-* should match exactly the configuration name of the ifcfg-* file for the interface. For the usage with NetworkManager (where you don't necessarily need a ifcfg-* file) you can also use /etc/sysconfig/network/ifser- vices-<interface>-<essid>/ (for wlan interfaces) or if that does not exist /etc/sysconfig/network/ifservices-<interface>/. As a final fallback /etc/sysconfig/network/ifservices/ is checked as well. If NetworkManager is active services will be stopped after the interface is down. The links in this directory are equal to the links in the runlevel directories /etc/init.d/rc*.d/ They have to point to service start scripts which are usually in /etc/init.d/. Links starting with 'S' are start links, which are called in alphabetical order after ifup has set up the interface. Links starting with 'K' are kill links which are called before ifdown takes down the interface. See also section Sequencing Directories in boot (7). EXAMPLE
In this example we use an interface with MAC address 00:de:ad:be:af:00. This interface is not always physically connected. As soon as you plug in the cable ypbind and autofs should be started. When you pull the cable they should be stopped. This can be reached with: in file /etc/sysconfig/network/ifcfg-eth-id-00:de:ad:be:af:00 ... STARTMODE=ifplugd ... in dir /etc/sysconfig/network/ifservices-eth-id-00:de:ad:be:af:00/ S10portmap -> /etc/init.d/portmap S20ypbind -> /etc/init.d/ypbind S30autofs -> /etc/init.d/autofs S20autofs -> /etc/init.d/autofs K30ypbind -> /etc/init.d/ypbind Now you have to disable the start of this services at boot time chkconfig ypbind off chkconfig autofs off Notes: You may call scripts/create-ifservices-directory [<interface_name>] to create a directory with the links from this example. This will cre- ate the directory ifservices-<interface_name> or if no interface name was given ifservices-template. Maybe you have to add also variable IFPLUGD_PRIORITY. For details about startmode ifplugd read ifup (8). The service portmap had to be added because ypbind needs it. This service is still started at boot time because it does not need an active network connection. But ypbind may now be started earlier as usual. Therefore we make sure that portmap is started before. Starting an already running service again does not affect the service. SEE ALSO
ifup(8), ifcfg(5). AUTHOR
Christian Zoz <zoz@suse.de> sysconfig February 2005 IFSERVICES(5)
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