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Operating Systems Linux Red Hat Netdump over bonded interface ? Post 302336530 by shriyer on Wednesday 22nd of July 2009 09:55:37 AM
Old 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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IFENSLAVE(8)						    BSD System Manager's Manual 					      IFENSLAVE(8)

NAME
ifenslave -- Attach and detach slave network devices to a bonding device. SYNOPSIS
ifenslave [-acdfhuvV] [--all-interfaces] [--change-active] [--detach] [--force] [--help] [--usage] [--verbose] [--version] master slave ... DESCRIPTION
ifenslave is a tool to attach and detach slave network devices to a bonding device. A bonding device will act like a normal Ethernet network device to the kernel, but will send out the packets via the slave devices using a simple round-robin scheduler. This allows for simple load- balancing, identical to "channel bonding" or "trunking" techniques used in switches. The kernel must have support for bonding devices for ifenslave to be useful. OPTIONS
-a, --all-interfaces Show information about all interfaces. -c, --change-active Change active slave. -d, --detach Removes slave interfaces from the bonding device. -f, --force Force actions to be taken if one of the specified interfaces appears not to belong to an Ethernet device. -h, --help Display a help message and exit. -u, --usage Show usage information and exit. -v, --verbose Print warning and debug messages. -V, --version Show version information and exit. If not options are given, the default action will be to enslave interfaces. EXAMPLE
The following example shows how to setup a bonding device and enslave two real Ethernet devices to it: # modprobe bonding # ifconfig bond0 192.168.0.1 netmask 255.255.0.0 # ifenslave bond0 eth0 eth1 AUTHOR
ifenslave was originally written by Donald Becker <becker@cesdis.gsfc.nasa.gov>, and has since been updated by various kernel developers. This manual page was written by Guus Sliepen <guus@debian.org> for the Debian GNU/Linux system. May 31, 2019

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