tap on lagg ?

Vincent Olivier vincent at up4.com
Tue Feb 7 06:31:47 UTC 2017

>> I have multiple machines on which 2 or more nics make up a LACP lagg
>> with vlans on it. Those vlan interfaces are in bridges together with the
>> tap interfaces that are in use by bhyve vms.
>> Works as long as I "up" the nics in a specific fasion ( " -tso4 -lro
>> -vlanhwtag " ) . This works on 10.3 and 11.0 as far as I'm aware and I
>> have never experienced problems with it (Intel / AMD / em driver / bce
>> driver, re driver , all kinds of combinations).
>> I have no experience in comparable setups without the vlan "layer" though.
> I've gotten it to work both with and without vlan just by using
> -vlanhwtag.  Leaving lro & tso4 enabled works fine.  In fact,
> everything works fine with vlanhwtag enabled until I throw epair into
> the mix.  This is using cxgbe/cxl.

For the sake of exhaustivity: I have Chelsio cxgb devices in the machine I’m testing this on, but I (am pretty certain) I was only using the Intel igb devices in the aggregate. I am also pretty sure that was without the -vlanhwtag flag that I will now test ASAP.

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