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The router in use might not support IP packet fragmentation

Firmware

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14 replies to this topic

#1
Killhippie

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Since the last update I hadn't done a speedtest on my PS4. I used to be able to do a speedtest and the antibufferbloat would not engage as its set for high priority traffic only and it was never triggered by just doing a speed test, it only did when playing games. Now it takes ages to work out my NAT type (Type 2) and the speeds shown are those you would expect with antibufferbloat enabled at 70% for my line and the high priority traffic light comes on, also it now says "The router in use might not support IP packet fragmentation, and some network features of the PS4 might be restricted.

 Not quite sure what's happened here, also UPnP is not showing the PS4 in the UPnP tables still, although I'm not sure if a PS4 speed test would trigger UPnP port mapping. It seems only Skype triggers both TCP and UDP. Something has changed in this update unless this is now how its meant to be now regarding the PS4 speed test being high priority traffic also PS4 background traffic is triggering antibufferbloat now and then too, but I should not be getting the IP Fragmentation message surely?



#2
Netduma Fraser

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Awhile back we specifically implemented something to prevent that fragmentation issue. Hard turn off the console then wait for high priority to disappear then turn it on 


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#3
Killhippie

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Awhile back we specifically implemented something to prevent that fragmentation issue. Hard turn off the console then wait for high priority to disappear then turn it on

Hard turn offf as power down and pull the plug? Just to confirm.

#4
Netduma Fraser

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Hard turn offf as power down and pull the plug? Just to confirm.

 

Yes please


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#5
Killhippie

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Didn’t help. Speedtest recognised as high priority traffic gets stuck on working out what NAT type way to long (it does complete to NAT type 2) and then gives that message. Rebooted router same result too.

#6
Netduma Fraser

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Didn’t help. Speedtest recognised as high priority traffic gets stuck on working out what NAT type way to long (it does complete to NAT type 2) and then gives that message. Rebooted router same result too.

 

Have you changed NAT from secured to open by any chance?


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#7
Killhippie

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Have you changed NAT from secured to open by any chance?

No I always run with NAT secured. On the previous firmware I could run the PS4 Speedtest and it wouldn’t show as high-priority traffic and everything completed fine, on this version it’s picking up the PS4 as high-priority traffic straightaway which it’s never done before. Also in the router logs you can see when the PS4 is standby mode it checks for updates and the router applies antibufferbloat briefly too at these times.

#8
Netduma Fraser

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Disable Traffic Prio does IP frag go away?


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#9
Killhippie

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Disable Traffic Prio does IP frag go away?

Alas it does not Fraser. Still gets stuck for ages on NAT. When re-enabling high priority it turns on as soon as the PS4 hits the home screen. Once again it never did that before, it only did it when you started a game.



#10
Netduma Fraser

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It might actually be the Geo-Filter blocking the NAT server causing it to be slow and think you have an IP fragment issue. Remove from Geo and try again


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#11
Killhippie

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It might actually be the Geo-Filter blocking the NAT server causing it to be slow and think you have an IP fragment issue. Remove from Geo and try again

same result. I’ve seen this before with Netgear routers, something is changed in the firmware so when the PS4 checks the nat type of the router it’s causing an issue, and it thinks the router does not support ip fragmentation. The speeds check finishes and NAT type 2 is as it should be but for some reason it’s taking too long to recognise the NAT type in the first place. Sometimes it’s the MTU but I have changed that to 1492 which is what I use and it’s still no good. Also I thought ‘when high priority traffic is detected’ is there so you can download game patches etc at full speed and the antibufferbloat only kicking in when gaming? This behaviour has changed since the previous firmware so is this an intentional change?

#12
Netduma Fraser

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I'll have to look into it then, don't believe we changed anything so maybe a Netgear/PS4 change that counteracted it so will look into it. Not intentional.


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#13
Killhippie

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I'll have to look into it then, don't believe we changed anything so maybe a Netgear/PS4 change that counteracted it so will look into it. Not intentional.

Thanks Fraser, your quick responses are appreciated as always. Look forward to a fix for what ever is causing this, I was wondering if it was something to do with the DPI engine recognising anything to do with PlayStation traffic and instantly changing devices to PlayStation consoles as in the official PlayStation website on my iMac and PlayStation messenger on my iPad which are obviously both not consoles but which the router changed both to PlayStation in device manager? Good to know that this behaviour is not how it should be though thanks for the update.

#14
Killhippie

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Just a quick update the XR500 after re-applying my Geo Filter position and  game profile settings is now letting the PS4 not engage high priority traffic for the home screen but it still engages in a speedtest on the PS4 and IP fragmentation is still present when it gets stuck on the routers NAT type (Type 2) It takes maybe 15-20 seconds to work out the routers nat type when in the previous firmware this was not the case, also in previous firmware's you could see the full download speed of your line using the PS4 speed test facility as Antibufferbloat did not kick in using the speedtest. Thought I would update you on this. :)



#15
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Just a quick update the XR500 after re-applying my Geo Filter position and  game profile settings is now letting the PS4 not engage high priority traffic for the home screen but it still engages in a speedtest on the PS4 and IP fragmentation is still present when it gets stuck on the routers NAT type (Type 2) It takes maybe 15-20 seconds to work out the routers nat type when in the previous firmware this was not the case, also in previous firmware's you could see the full download speed of your line using the PS4 speed test facility as Antibufferbloat did not kick in using the speedtest. Though I would update you on this. :)

 

Ok, thanks for the update. Good to know. @Fraser - could you pass onto NETGEAR please.







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