SQM - Bufferbloat over WG VPN (Nord) - Flint2

Hi,

If I switch the VPN off - I get A+ ratings so I'm happy, but once I turn it on I get +25 download latency, upload is fine. Is there any fine tuning I can do?

See some settings so far:

config queue 'wan'
option enabled '1'
option interface 'pppoe-wan'
option download '430000'
option upload '63000'
option debug_logging '0'
option verbosity '5'
option qdisc 'cake'
option script 'piece_of_cake.qos'
option qdisc_advanced '1'
option squash_dscp '0'
option squash_ingress '0'
option ingress_ecn 'ECN'
option egress_ecn 'NOECN'
option qdisc_really_really_advanced '1'
option itarget 'auto'
option etarget 'auto'
option iqdisc_opts 'nat dual-dsthost ingress'
option eqdisc_opts 'nat dual-srchost ack-filter diffserv3'
option linklayer 'ethernet'
option overhead '44'
option linklayer_advanced '1'
option tcMTU '2047'
option tcTSIZE '128'
option linklayer_adaptation_mechanism 'default'
option tcMPU '84'

root@GL-MT6000:~# uci show sqm
sqm.wan=queue
sqm.wan.enabled='1'
sqm.wan.interface='pppoe-wan'
sqm.wan.download='430000'
sqm.wan.upload='63000'
sqm.wan.debug_logging='0'
sqm.wan.verbosity='5'
sqm.wan.qdisc='cake'
sqm.wan.script='piece_of_cake.qos'
sqm.wan.qdisc_advanced='1'
sqm.wan.squash_dscp='0'
sqm.wan.squash_ingress='0'
sqm.wan.ingress_ecn='ECN'
sqm.wan.egress_ecn='NOECN'
sqm.wan.qdisc_really_really_advanced='1'
sqm.wan.itarget='auto'
sqm.wan.etarget='auto'
sqm.wan.iqdisc_opts='nat dual-dsthost ingress'
sqm.wan.eqdisc_opts='nat dual-srchost ack-filter diffserv3'
sqm.wan.linklayer='ethernet'
sqm.wan.overhead='44'
sqm.wan.linklayer_advanced='1'
sqm.wan.tcMTU='2047'
sqm.wan.tcTSIZE='128'
sqm.wan.linklayer_adaptation_mechanism='default'
sqm.wan.tcMPU='84'

Thanks for your help!

This is the result with VPN ON - (I've got 500 down / 70 up and settings to use 90% of that)

After enable the VPN, your traffic will go to VPN.
The increase in buffer is because of the delay in the VPN tunnel, which is related to the server location, distance, server QOS, etc. of the VPN provider.

There is no way to fine tune to improve it.