Confused what to select for WAN packet overhead?

[zli]

a little help please. My ISP modem is in bridge mode and I do all the settings on the Asus router. I have a static IP address and my question is what should I mark under -WAN packet overhead-FlexQos.!? Thank you very much!
Ps. I use fiber optic internet 600 down and 600 up.

Somewhere on another forum I read to check mtu, my is 1500 (standard) and the largest packet that I can open without being fragmented : ping -f -l .... 8.8.8.8, in my case 1472, and that number from 1472 to 1500, which is 28, should be in -WAN packet overhead- Does that make any sense?

 

[Kingp1n]

a little help please. My ISP modem is in bridge mode and I do all the settings on the Asus router. I have a static IP address and my question is what should I mark under -WAN packet overhead-FlexQos.!? Thank you very much!
Ps. I use fiber optic internet 600 down and 600 up.

Somewhere on another forum I read to check mtu, my is 1500 (standard) and the largest packet that I can open without being fragmented : ping -f -l .... 8.8.8.8, in my case 1472, and that number from 1472 to 1500, which is 28, should be in -WAN packet overhead- Does that make any sense?

I would leave the WAN packet overhead at '0'.

Also if everything is working as intended I wouldn't mess with the default (1500) MTU settings. I've never messed with the MTU settings.

 

[zli]

I would leave the WAN packet overhead at '0'.

Also if everything is working as intended I wouldn't mess with the default (1500) MTU settings. I've never messed with the MTU settings.

My problem is that I'm chasing a ghost . I bought the router exclusively for gaming. When I get home from work and the kids go to bed, I like to take 3,4 hours to myself and just play that one game of Call of Duty. FPS games are very sensitive and every millisecond is important. I try in every way to get the best that an Asus router can give.

 

[Kingp1n]

My problem is that I'm chasing a ghost . I bought the router exclusively for gaming. When I get home from work and the kids go to bed, I like to take 3,4 hours to myself and just play that one game of Call of Duty. FPS games are very sensitive and every millisecond is important. I try in every way to get the best that an Asus router can give.

I saw from your previous post you have a fiber connection (600 down/600 up). You honestly don't need QoS enabled with this speeds. Are you noticing lag when you play?

Also please share screenshots from the QoS & FlexQoS (customize) tab to see how you setup QoS. I think you're using the Gaming rule correct for your PS5?

Also how did you setup the manual speeds & categories under QoS tab ? Please use the customize option and try to put the categories in this order:

Gaming
Others
Work-from-Home (can put out on top of gaming)
Web Surfing
Video/Audio Streaming
File Sharing
Learn-from-Home

 

[zli]

I saw from your previous post you have a fiber connection (600 down/600 up). You honestly don't need QoS enabled with this speeds. Are you noticing lag when you play?

Also please share screenshots from the QoS & FlexQoS (customize) tab to see how you setup QoS. I think you're using the Gaming rule correct for your PS5?

Also how did you setup the manual speeds & categories under QoS tab ? Please use the customize option and try to put the categories in this order:

Gaming
Others
Work-from-Home (can put out on top of gaming)
Web Surfing
Video/Audio Streaming
File Sharing
Learn-from-Home

Yes, that's what I did. Gaming first and Learn-from-home last. I manually reduced the speeds and set them to 150 from 600. When I turn off QOS, the whole router is in chaos and I don't think it knows what it's doing.There is a lag in the game. It often happens that I shoot first - die first. It drives me crazy, man.I have a stable connection on pingplotter. Only 2 ms variation. My PS5 is connected via Lan cable.In 80% of cases the router does not recognize the Call of Duty App and switches to General. Whether FlexQos should be developed further or not, I don't know.I have an A+ score on Bufferbloat test. I don't know what else I can do to reduce the lag in the game? 192.168.50.93 is the IP of PS5

 

[Kingp1n]

Yes, that's what I did. Gaming first and Learn-from-home last. I manually reduced the speeds and set them to 150 from 600. When I turn off QOS, the whole router is in chaos and I don't think it knows what it's doing.There is a lag in the game. It often happens that I shoot first - die first. It drives me crazy, man.I have a stable connection on pingplotter. Only 2 ms variation. My PS5 is connected via Lan cable.In 80% of cases the router does not recognize the Call of Duty App and switches to General. Whether FlexQos should be developed further or not, I don't know.I have an A+ score on Bufferbloat test. I don't know what else I can do to reduce the lag in the game? 192.168.50.93 is the IP of PS5

Turn off QoS. 600 down/600 up..... your problems are somewhere else. I wld recommend you contact your ISP to look at wiring/cables to possibly fix your lag.

 

[dave14305]

I would recommend setting “Router/VPN Client Outbound Traffic Class” back to “File Transfers” instead of “Gaming”. No Gaming traffic would originate from the router itself, and I assume you don’t connect to the Gaming servers over a VPN Client? That’s the only purpose of this option.

When in doubt about the Overhead, choose “Conservative default”. Better to overstate the overhead than understate it.

 

[zli]

I would recommend setting “Router/VPN Client Outbound Traffic Class” back to “File Transfers” instead of “Gaming”. No Gaming traffic would originate from the router itself, and I assume you don’t connect to the Gaming servers over a VPN Client? That’s the only purpose of this option.

When in doubt about the Overhead, choose “Conservative default”. Better to overstate the overhead than understate it.

I re-subscribed to PIA VPN 5 days ago and I'm currently online via VPN. Should I do this with the settings or do I have any special router settings for VPN?

 

[dave14305]

I re-subscribed to PIA VPN 5 days ago and I'm currently online via VPN. Should I do this with the settings or do I have any special router settings for VPN?

If your gaming traffic goes through the VPN, then you can leave it as it is. But all traffic going through the VPN client will be considered Gaming traffic.

 

[zli]

I asked them about MTU and they sent me this. Does this make sense!?

Marius Vlasceanu, Apr 5, 2025, 2:50 AM GMT+8:

Steps to Set MTU in OpenVPN Files​

1.​

• Find the .ovpn configuration file that you're using with OpenVPN.
• Open this file using a text editor such as Notepad (Windows) or TextEdit (macOS).

2.​

In the .ovpn configuration file, you can add the following settings to manually control the MTU (Maximum Transmission Unit), fragmentation, and MSS (Maximum Segment Size).
Example configuration settings:
bash<br>CopyEdit<br><br>mtu 1400<br>fragment 1300<br>mssfix 1200

• <strong>mtu 1400</strong>: This sets the MTU size. You can adjust this value based on your network, but 1400 is commonly used for VPN connections to avoid packet fragmentation.
• <strong>fragment 1300</strong>: This option forces the VPN to fragment any packets larger than 1300 bytes. It ensures packets won't exceed the MTU size and avoids fragmentation issues.
• <strong>mssfix 1200</strong>: This reduces the Maximum Segment Size (MSS) for TCP packets to 1200 bytes, ensuring packets fit within the MTU and don't cause fragmentation.

3.​

After adding these settings, save the changes and close the text editor.

4.​

After modifying and saving the .ovpn file, reconnect your OpenVPN client using this updated configuration.

---

Why Use These Settings?​

• MTU: This controls the maximum packet size for data transmitted over the network. Reducing it can prevent fragmentation, especially for VPN traffic.
• Fragment: This setting ensures that OpenVPN will fragment packets that are too large to avoid issues with packet transmission.
• MSSFix: This option is used to modify the TCP packet size, ensuring that the packets are small enough to avoid exceeding the MTU and causing issues on the network.

---

Other Considerations:​

• Finding the Optimal MTU: If 1400 or 1450 doesn't work well in your case, try adjusting the MTU size slightly (e.g., 1300 or 1500) to see which one works best.
• Testing: After applying these settings, you may want to test your connection to ensure that performance has improved and that packet fragmentation no longer occurs.

Regards,

Marius V
Private Internet Access Inc.

 

[zli]

I tried to do this with a VPN file and the router does not recognize what I marked in red.I'm trying to do everything I can to improve hit detection for Call of Duty.

 

[iTyPsIDg]

All of those settings you mentioned can be entered under custom configuration for the VPN client you are using:

 

[zli]

What is the purpose of the additional setting tun-mtu-extra 32 and explicit-exit-notify 3?Tnx

 

[iTyPsIDg]

What is the purpose of the additional setting tun-mtu-extra 32 and explicit-exit-notify 3?Tnx

I pulled most of that from @Viktor Jaep here: https://www.snbforums.com/threads/openvpn-keeps-on-turning-itself-off.89492/post-900869

There is another thread about it here: https://www.snbforums.com/threads/w...-i-use-this-config-on-my-merlin-router.93926/

 

[ColinTaylor]

I pulled most of that from @Viktor Jaep here: https://www.snbforums.com/threads/openvpn-keeps-on-turning-itself-off.89492/post-900869

There is another thread about it here: https://www.snbforums.com/threads/w...-i-use-this-config-on-my-merlin-router.93926/

Neither of those threads explain the purpose of those two parameters. The tun-mtu-extra line is already included in a config file downloaded from NordVPN's website, but I can't speak for PIA.

The parameters are explained in the OpenVPN reference manual:

Reference Manual For OpenVPN 2.6 | OpenVPN

openvpn.net

 

[Kingp1n]

I re-subscribed to PIA VPN 5 days ago and I'm currently online via VPN. Should I do this with the settings or do I have any special router settings for VPN?

Just a heads-up.... I never had great results while using a VPN & gaming and it actually created more latency for me. Remember you're adding additional servers for traffic to travel through. Test gaming both while using the VPN and without to see if it's making things worst!

 

[Ranger802004]

Test your bufferbloat here and adjust QoS accordingly.

Bufferbloat and Internet Speed Test - Waveform

Is bufferbloat causing issues with your internet connection? Run this test to find out.

www.waveform.com

 

[sfx2000]

ballpark for DOCSIS...


config queue 'eth1'
option enabled '1'
option interface 'eth1'
option download '950000'
option upload '950000'
option qdisc 'cake'
option script 'layer_cake.qos'
option qdisc_advanced '1'
option ingress_ecn 'ECN'
option egress_ecn 'ECN'
option linklayer 'ethernet'
option debug_logging '0'
option verbosity '5'
option squash_dscp '1'
option squash_ingress '1'
option overhead '44'

 

[sfx2000]

When benchmarking - consider Cloudflare's speed test, as it leverages into their CDN, and it is also IPv6 savvy...

Internet Speed Test - Measure Network Performance | Cloudflare

Test your Internet connection. Check your network performance with our Internet speed test. Powered by Cloudflare's global edge network.

speed.cloudflare.com