topic cat /proc/net/bonding/bond0 in Operating System - Linux

cat /proc/net/bonding/bond0

Nath_3 — Thu, 30 Apr 2009 15:18:43 GMT

i need some explaination regarding the options in this file.
Ethernet Channel Bonding Driver: v2.6.3-rh (June 8, 2005)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: eth5
Currently Active Slave: eth5
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eth0
MII Status: up
Link Failure Count: 2
Permanent HW addr: 00:21:5a:50:02:78

Slave Interface: eth5
MII Status: up
Link Failure Count: 1
Permanent HW addr: 00:21:5a:50:42:03

What does this fault-tolerance mode and load balancing mode mean.

How can i know whether the bonding done is for load balancing or for high performance thruput.

Thanks
Ravi

Re: cat /proc/net/bonding/bond0

Ivan Ferreira — Thu, 30 Apr 2009 18:17:38 GMT

Please see bonding.txt in the kernel documentation:

http://www.kernel.org/pub/linux/kernel/people/marcelo/linux-2.4/Documentation/networking/bonding.txt

mode= Possible values are 0 (round robin policy, default) and 1 (active backup
policy), and 2 (XOR). See question 9 and the HA section for additional info.

In fault-tolerance (active-backup), only one interface is handling the traffic at a time.

Re: cat /proc/net/bonding/bond0

Nath_3 — Thu, 30 Apr 2009 19:45:28 GMT

I was able to understand few things in that txt. Good doc. But Regarding the BONDING MODE.

what is the difference between fault-tolerance mode and load balancing mode

mode 2

Regards
Ravi

Re: cat /proc/net/bonding/bond0

Ivan Ferreira — Fri, 01 May 2009 02:17:22 GMT

Load balancing mode will distribute the load having both interfaces active. To allow this, the network switch also should be configured to allow this.

Re: cat /proc/net/bonding/bond0

Nuwan Alwis — Mon, 04 May 2009 03:18:11 GMT

Hi Ravi,
Im also with Ivan.
This bond works on active-backup mode so at a time only one card is used to handle network traffic and if one card fails the other will take over the job.

In the current mode there is no load balancing.
but you can change the mode to load balance mode "balance-rr" or 0, also there are many to select.

in balance-rr mode, both NIC s use to transmit data so the load distributed among all slave cards in a round-robin manner.

Good Luck...!