Traffic Shaping Limiters with mulitgig - limit is 4200Mbps

saqibs

I have a 5Gbps circuit from ATT and was trying to implement the FQ_CODEL queues to reduce bufferbloat.

I found a small limitation, the bandwidth limit filed is a 32bit number, therefore maximum number is can accept it 4294.

I was setting it at 4600 and it would accept it and fail with the following error in the log, and all traffic would be dropped as the floating rules then sent traffic to queues that don't exist, so every packet on the WAN was dropped.

dnctl /tmp/rules.limiter returned exit code '65' ... 'Line 2: bandwidth too large'

Setting it to 4200 made it all work.

Would be great if Netgate would implement a GUI that warned us of this.

luckman212

Yup. There's not much Netgate can do here unfortunately. Those damn 32bit numbers bite again. This is an upstream problem.

There's a 3+ year old bugreport for it here:

https://redmine.pfsense.org/issues/14128