Getting full duplex for bonded interface

It seems this is expected behaviour for mii-tool in that it's not reporting an accurate link status for bond0.  You can find examples on the web.

My test system is reporting the same output as yours in response to "mii-tool bond0" but what we can do is perform a ‘real’ test to learn the actual throughput between Avamar nodes by using the ‘iperf’ tool.

See the following KB article for a short example of how to run iperf between two Avamar nodes.

esg106463    How to run iperf between two Avamar systems to test network throughput performance

Typical output seen on a system which is working correctly is shown below.  If you're getting something like this then we can be sure that there is Gigabit ethernet connectivity between the Avamar nodes.

Client connecting to avamar1, TCP port 5001

TCP window size: 16.0 KByte (default)

------------------------------------------------------------

[  3] local 10.xxx.xxx.xxx port 36734 connected with 10.xxx.xxx.xxx port 5001

[ ID] Interval       Transfer     Bandwidth

[  3]  0.0- 1.0 sec   112 MBytes   941 Mbits/sec

[  3]  1.0- 2.0 sec   112 MBytes   941 Mbits/sec

[  3]  2.0- 3.0 sec   112 MBytes   941 Mbits/sec

[  3]  3.0- 4.0 sec   112 MBytes   941 Mbits/sec

[  3]  4.0- 5.0 sec   112 MBytes   941 Mbits/sec

[  3]  5.0- 6.0 sec   112 MBytes   941 Mbits/sec

[  3]  6.0- 7.0 sec   112 MBytes   941 Mbits/sec

[  3]  7.0- 8.0 sec   112 MBytes   941 Mbits/sec

[  3]  8.0- 9.0 sec   112 MBytes   941 Mbits/sec

[  3]  0.0- 9.8 sec  1.07 GBytes   941 Mbits/sec

This is a useful test to bear in mind since Gigabit ethernet connectivity between all Avamar nodes is critical.

I believe mii-tool is semi-deprecated, ethtool is what you probably should be using to check your speed/duplex settings.  mii-tool doesn't understand gigabit, it's only useful up to 100mbit.

Not all EMC Linux loads have ethtool (or mii-tool for that matter), but the Avamars most certainly have it.

Also, as was noted before, the bond interfaces are virtual, so don't always reflect reality.  You can check the speeds of the individual ports assigned to the bonding group using ethtool.

I'm  more comfortable knowing that it is normal for all systems, I also tried  it on some other systems in production and the result is the same

best regards.

Hi Guys,

I tried this and on Node B i get a "Connect Failed: Connection Refused. Could anyone explain Why. orry bit of a noob at unix. I followed this tech article.

http://solutions.emc.com/emcsolutionview.asp?id=esg106463

Goal How to run iperf between two Avamar systems to test network throughout the performance Resolution 1) From Avamar system A (We use dpn09s for this example.  Substitute your server name.). 2) Start a putty session and log in as admin. 3) Run the iperf -s -i 1 command. 4) Leave the previous command running and go to Avamar system B. 5) Start a putty session from Avamar system B and log in as admin. 6) Run the iperf -c dpn09s.avamar.com -i 1 command. 7) Let this run.  After it stops send the output. 8) End the sessions with Ctrl/C.

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