QoS effect on packet fragmentation?

[Find the Door]

I'm trying to preserve some bandwidth via QoS, and am trying to regulate my network in order to ensure a lag free online gaming experience.


I'm running the latest Merlin build (3.0.0.4.374.35_4) on my Asus AC66R

Following a factory reset I enabled QoS. Prior to enabling it my connection test on my PS4 goes through without a hitch - after enabling it I get prompted with:

"Your router in use might not support IP packet fragmentation, and some network features of the PS4 might be restricted. For details, contact the routers manufacturer."

This is only after enabling QoS

It happens every time it tests my NAT Type.


Truthfully I'm a bit confused on how to configure QoS anyhow, but I'd figure I'd dabble out of boredom.

Any suggestions?

Thanks,
Door


EDIT:

After further research I've found this post (http://community.us.playstation.com...support-IP-fragments-quot/m-p/42393739#M55994)

Seems that this is an issue dating back to the PS3! What in the world would cause QoS to trigger this?

 

[Find the Door]

Anyone have a solution to this?

Sent from my SCH-R530C using Tapatalk

 

[Pericynthion]

No solution- I did find a note on another 3rd party firmware that indicates this is an issue with UDP fragmentation specifically. I tried various ways prioritize the QOS rules (Playstation network protocols etc) but without any luck.

It doesn't appear to affect in-game play from what I can see - it the only way I can see around it is to disable QOS.


Sent from my iPhone using Tapatalk

 

[Find the Door]

No solution- I did find a note on another 3rd party firmware that indicates this is an issue with UDP fragmentation specifically. I tried various ways prioritize the QOS rules (Playstation network protocols etc) but without any luck.

It doesn't appear to affect in-game play from what I can see - it the only way I can see around it is to disable QOS.


Sent from my iPhone using Tapatalk

Any hope for a fix with Merlins build? I just purchased an AC68R due to my incredible employee discount. I have yet to test it, but I fear more of the same.

 

[Find the Door]

I can confirm this issue is absent on the AC68R!

So happy I upgraded!


.... Now to figure out QoS...

 

[sinshiva]

what kind of internet connection do you all have?

 

[Find the Door]

Comcast Blast! tier (60 D/L 11 U/L)

IPV6 support

Running on a Motorola SB6141, connected to a Asus AC68R via Cat-6e cables (3ft short runs).

Sent from my SCH-R530C using Tapatalk

 

[sinshiva]

hw acceleration disabled? jumbo frames disabled?

also, with qos enabled, if you execute 'ifconfig -a' from the router, does anything have anything besides 1500 MTU ?

 

[sinshiva]

so you know where this theory is coming from;

In the case of an Ethernet frame this adds an overhead of 18 bytes, or 22 bytes with an IEEE 802.1Q tag for VLAN or quality of service.

execute the following;

change wan MTU to 1478 via WAN page or

ifconfig eth0 mtu 1478 up

execute the commands

ifconfig eth1 mtu 1478 up
ifconfig eth2 mtu 1478 up
ifconfig br0 mtu 1478 up

see if this makes the problem go away, if it does, then we'll have to make it more permanent

good luck

[edit/] it might need to be that the wan MTU stays 1500 while the lan-side is 1478, sorry