Oops, sorry I didn’t notice this before but it’s the ingress keyword that makes the difference:

qdisc cake 802c: dev ifbLink2 parent 1:1 bandwidth unlimited besteffort dual-dsthost nonat nowash ingress no-ack-filter no-split-gso rtt 100.0ms raw overhead 0 

IP1, 1 up: 46.8 Mbit
IP2, 16 up: 46.8 Mbit
IP1, 16 down: 41.9 Mbit
IP2, 1 down: 51.1 Mbit

qdisc cake 803a: dev ifbLink2 parent 1:1 bandwidth unlimited besteffort dual-dsthost nonat nowash no-ack-filter no-split-gso rtt 100.0ms raw overhead 0 

IP1, 1 up: 46.6 Mbit
IP2, 16 up: 46.5 Mbit
IP1, 16 down: 46.4 Mbit
IP2, 1 down: 46.5 Mbit

Also, my setup is different in that I use cake as a leaf to either hfsc or htb. But, it’s adding the ingress keyword that causes the imbalance for me.

> On Mar 2, 2019, at 11:20 AM, Pete Heist <pete@heistp.net> wrote:
> 
> Great, thanks for trying it. That strongly suggests a problem with the kernel (or driver) I’m using. Feels better to know it works as it should in recent kernels though...
> 
>> On Mar 2, 2019, at 5:47 AM, George Amanakis <gamanakis@gmail.com> wrote:
>> 
>> On Fri, 2019-03-01 at 22:02 -0500, George Amanakis wrote:
>>> 
>>> I will setup a vlan and try again.
>>> 
>> 
>> I replicated Pete's VLAN setup, and I am getting fairness:
>> 
>> IP1,2 <---> router enp1s0 / router enp1s0.100 <---> server
>> 
>> IP1, 1 up:      46.73 mbit/s
>> IP2, 32 up:     46.91
>> IP1, 32 down:   46.70
>> IP2, 1 down:    46.89
>> 
>> qdisc cake 8006: dev enp1s0.100 root refcnt 2 bandwidth 100Mbit
>> diffserv3 dual-srchost nonat nowash no-ack-filter split-gso nofwmark
>> rtt 100.0ms noatm overhead 4
>> 
>> qdisc cake 8002: dev ifb0 root refcnt 2 bandwidth 100Mbit diffserv3
>> dual-dsthost nonat nowash no-ack-filter split-gso nofwmark rtt 100.0ms
>> noatm overhead 4
>> 
>> 
>> 
>