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bradlis7
Asked: 2010-04-02 12:46:19 +0800 CST

Monitor Bonded Interface for Disconnection

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I am trying to monitor for network failures on a machine, and one portion of that is to monitor interfaces that are intended to be active also be "RUNNING".

An Ethernet port, such as eth0, will say "RUNNING" if it is physically connected to another device.

The problem lies in the bonded interfaces, such as bond0. If all of the ethernet devices are disconnected, it still says that it is running, and it is still pingable. Is this by design, or is my system setup incorrectly? Does the miimon option have something to do with this?

EDIT

I found a possible issue, thanks to Gregor. When I ran cat /proc/net/bonding/bond0, it gave me this (notice MII Polling Interval):

Bonding Mode: load balancing (round-robin)
MII Status: up
MII Polling Interval (ms): 0
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eth7
MII Status: up
Link Failure Count: 0

But in my /etc/modprobe.conf, I set it up like this:

alias bond0 bonding
options bond0 -o bond0 mode=0 miimon=100

So, evidently, the miimon setting is not working correctly.

linux networking bonding

2 Answers

  1. Have you looked at ethtool or mii-tool? That's typically how I determine link status without physically inspecting the server in Linux.

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  2. Best Answer

    Your script could scan /proc/net/bonding/bondX for some status information. - Greg

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