Etherchannel throughput

[spamly]

What kind of throughput do you see with your standard etherchannel devices? I've got an etherchannel device made up of the following:
en0 100MB/FD
en1 100MB/FD

When I use nmon to see how much data I can transfer across it, I only see about 11 MB a second. This is what I previously saw with only one adapter in a non-etherchannel setup. I was hoping for close to double the throughput.

 

[comtec17]

100Mb/FD = 10MB/sec

 

[spamly]

Right...

Okay, I suppose I wasn't clear. I know that I can expect 10 Megabytes of data across a single 100 Megabit ethernet adapter. I've got two ethernet adapters in an etherchannel devices. I still only see the throughput as if I have one adapter. What is the max throughput that others are seeing out there?

On this note, does anyone have a way of checking the status of ethernet adapters in an etherchannel device? I know if one adapter goes offline I'll log it. If the log is cleared before I catch the message (don't ask), how can I tell that there is a problem?

Thanks in advance!

 

[hirschaj]

Etherchannel is used to increase adapter availability not to bridge together to make a larger pipe. So your throughput should remain the same no matter how many 100 Mb adapters you add to the etherchannel.

There are numerous methods of getting alerts sent to you when a hardware error is detected. Do a search for the many threads on this subject. I usually recommend the errnotify functionality but there are many other methods.

Jim Hirschauer

http://www.aixexpert.com

 

[spamly]

Thanks for the update on Etherchannel redundancy. I'm a little disapointed that it doesn't offer more throughput. Sun's etherchannel equivelent does.

As for error notification, that's fine and good, but not what I'm after. I've actually written a script to send and track hardware error reports.

What I'm looking for is a method to check to see if an etherchannel device is configured and working correctly.

 

[bonsky]

hirschaj is correct and does redundancy fail backup if configured. I am not sure whether your sun servers can do this one without the help of certain switch. Please bear in mind that your switch needs to be aware and should have capabilities to do etherchannel as well. So, when configuring etherchannel on AIX, try to use the switch that supports it.
For more info,

http://publib.boulder.ibm.com/infoc...aix.doc/aixbman/commadmn/tcp_etherchannel.htm

thanks!