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Forum Discussion
M4300 LACP/LAGG only works when incorrectly configured
I have video proof this time, although I'm not sure if I can post it.
I had a misconfigured M4300 where one of the hosts had a VHID that overlapped the LACP ports. The LAGG functioned correctly...
There is a single 40G interface (QSFP) on the Chelsio - are the four channels really working together as dynamic LACP LAGs?
Does the switch see and show a 802.1ad LACP LAG which is correctly up?
You might talk to Chelsio when it comes to the support of break-out interfaces (they list similar stuff on Chelsio Hardware Compatibility Guide (Cable configs July 2012) and the required configuration of a multi-10G based LAG.
Without practical experience with such fan-out ... I would guess a static LAC is the way to go.
Indeed; they are configured/flashed as 4x10gb (that was one of the first issues- vendor shipped wrong).
The cards ONLY will talk at 40gbe when one of the interfaces is going up or down. Attached is a picture showing 40gbs bandwidth. I got that 'throughput' by unchecking the 4x ports assigned to the LAG, and hitting apply- then for the next 30 seconds or so iperf3 would show the requisite speeds.
The LAG is set to
Admin: Enable
Link Trap: Disable
STP: Enable
Static: Disable
I believe if I set it to 'static', the LAG isn't working with Chelsio- I believe this quote is what I'm following:
• Static Mode indicates whether or not LACP is used, i.e. Static Mode set to Disable means LACP is used.
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