07-22-2009
Netdump over bonded interface ?
Netdump over bonded interface ?
Hey there,..
I have heard from admins, that netdump usually fails over a bonded network interface.
I have written a multi-OS checkdump script , which checks if the respective crashdump utility on corresponding OS is correctly configured, space is available, etc etc etc.
For the netdump check, I wanted to add in a check to see if netdump is using bonded interface . How do I do that ? I can easily find out if the system has bonding enabled or if bond0 is up or down .
But I want to know if Netdump is going to use this bonded interface to send out the dump, or the usual interface ?
/etc/sysconfig/netdump doesnt give much of an idea. Does LOCALPORT setting have something to do with it ? It defaults to 6666.
I have minimal understanding about the networking side of this problem, could some one please tell me :
1. How do I find out which network interface (outgoing) netdump is currently configured to use ? How to check if its bonded or not ??
2. I also wanted to do a ethtool $NIC to check if the ethernet link is
down or up, so this brings back to finding out which network interface is used by netdump , eth0 , eth1 , bond0 ??? How can I find this out.
Thanks,
Shrikant
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LEARN ABOUT SUSE
ifsysctl
IFSYSCTL(5) Network configuration IFSYSCTL(5)
NAME
ifsysctl[-<interface name>] - per network interface sysctl settings
SYNOPSIS
/etc/sysconfig/network/ifsysctl
/etc/sysconfig/network/ifsysctl-<interface name>
DESCRIPTION
These files are intended to contain sysctl settings, that should be applied when a network interface is created. This are usually interface
specific settings, like:
net.ipv6.conf.eth0.use_tempaddr = 1
or
net.ipv4.conf.eth0.rp_filter = 0
The settings are applied by the /etc/sysconfig/network/scripts/ifup-sysctl script executed via /etc/udev/rules.d/77-network.rules rule (see
udev(7)), after the creation and after the rename of the interface name to its persistent name (when applicable), but before the ifup
<interface name> -o hotplug may be executed to configure the interface.
The settings are not applied by default when the NetworkManager is active (NETWORKMANAGER=yes), except when the IFSYSCTL_NETWORKMANAGER=yes
variable is set in the /etc/sysconfig/network/config file.
Settings from the ifsysctl- file are applied every time an interface has been created.
Settings from the ifsysctl-interface name file are applied when the interface with the corresponding interface name has been created.
SYNTAX
The sysctl(8) utility is required to apply the settings. It supports two separator characters for sysctl keywords: a "." in default format
and a "/" in the alternate format. Therefore the syntax is basically same to the /etc/sysctl.conf file.
Interface names may contain a ".". In the default sysctl format using a "." as separator, that is any "." in the interface name of the key-
word, has to be replaced with a "/". In the alternate sysctl format with "/" as separator, normal interface names can be used.
Optionally, the ifsysctl files may contain also the $INTERFACE and the $SYSCTL_IF variables, that are automatically replaced with the cur-
rent interface name usable in the alternate format and with the sysctl-quoted interface name for the default format, before the settings
are passed to the sysctl utility.
Note also, that settings with variables in the ifsysctl (without the -<interface name> suffix), will be applied for every interface!
Further, files with variables are not compatible to the /etc/sysctl.conf file.
EXAMPLES
Settings for "eth0" and "eth0.1" interfaces
# using "." as separator:
net.ipv6.conf.eth0.use_tempaddr = 1
net.ipv6.conf.eth0/1.use_tempaddr = 1
# using "/" as separator:
net/ipv6/conf/eth0/use_tempaddr = 1
net/ipv6/conf/eth0.0/use_tempaddr = 1
Settings with variables:
# using "." as separator:
net.ipv6.conf.$SYSCTL_IF.use_tempaddr = 1
# using "/" as separator:
net/ipv6/conf/$INTERFACE/use_tempaddr = 1
To test your ifsysctl-eth0 or ifsysctl file, use:
/etc/sysconfig/network/scripts/ifup-sysctl eth0 -o debug
BUGS
Please report bugs at <https://bugzilla.novell.com/>
AUTHOR
Marius Tomaschewski <mt@suse.de>
SEE ALSO
ifup(8) ifcfg(5) sysctl(8)
sysconfig December 2009 IFSYSCTL(5)