IP Packet fragmentation error

[Aiden2k13]

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I was facing this IP Packet fragmentation a few days back ,so I reinstalled ps4 system software and reset the router and it was fine until today.

Can anyone tell how to fix this ?

 

[Shaun o]

Fragmentation is often down to the ISP side of your ADSL or Fiber service you have.
Adsl tends to suffer more from this vs fiber.

But the main causes can be a heavy loaded exchange, or a problem with the phone line used and its external state to your house.

The only other cause of packet fragmentation can be down to a bad Ethernet network cable you are using on your internal network side.
Or you can suffer from fragmentation of packets if using wi-fi in some cases due to interference of the wifi signal.
The max sixe of a packet should be optimized in your router or set to 1500 if any lower set it higher, do not go over the value of 1500 for the packet size also.
If you are using a router then if you log into it you should have a option to change the max packet size, amount of data sent or received. if set wrong it can cause packet fragmentation or loss.

 

[Kewlx25]

Load and interference does not cause fragmentation. Anything that damages a packet will cause the error checking to fail and the packet will be dropped. It will act just like packetloss.

Fragmentation is when a hop does not support such a large packet and will break the packet into two or more smaller packets. This is related to the MTU(maximum transmission unit). If the MTU is too large at one point and a hop doesn't support such a large packet, it will either drop it or fragment it so it will fit within the size limits.

All of that being said, ADSL is notorious for these issues because Ethernet has an MTU of 1500, but ADSL encapsulates packets in two extra layers. Each layer adds additional overhead, which further reduces the MTU. In theory, the "path MTU" should be detectable and the PS4 should automatically reduce the MTU, but if ICMP is blocked or the PS4 isn't intelligent enough, it may not recognize the issue.

Packet fragmentation is actually a very bad thing, so I have no idea why certain features may not work. The issue with fragmentation is if even one fragment is lost, the entire packet needs to be re-transmitted. It is very wasteful in the presence of any packetloss. To make matters worse, the process of fragmenting tends to send the fragments at line rate instead of pacing the packet. Because the packet is very large, you can get latency spikes.