MTU for XBOX live mutliplayer gaming on 5g home broadband

[Lexx289]

I am struggling to get my Xbox to work on Xbox live. Doing some googling it seems that the MTU is too low, it is 1360 and should be about 1385 to be able to work properly. I have rung three who seem to have no knowledge of what an MTU is and have sent me to the ombudsman. I have logged into the router (H122-373) and increased the MTU manually however it will not pull through onto my XBOX. I have put it in the DMZ, enabled UPNP and generally faffed with it as much as i can but the MTU on the XBOX does not change. I am assuming this is what is being sent from three and so it is something to be changed at three's end...

Does anyone else have any experience of this, or have any issues with XBOX live and home broadband 5g? or can they get it to work, cheers

[Jackmorris59]

When are you going to fix this you’ve miss sold to thousands!!!

[shadwuk]

I have this too and I'm now out of contract so I'm considering leaving.  Between this and the flakey random disconnect problems what would be a totally excellent service is made extremely poor.

[NobodyUK]

Still the same.

[Warby87]

I've been having this problem since day one over 5 month ago

[Jackmorris59]

Im still having this issue will it ever be resolved? Or am I changing provider 

[NobodyUK]

Try changing your APN from 3internet to three.co.uk. The MTU should then be stable at 1472.

Three's support are useless. Most of them don't even know what the MTU is. But it's being limited on the APN they have set up for the home routers (three.co.uk is the phone network).

[TylerM95]

Hi all,

having this same MTU problem, says I need 1384 or higher but when I test speeds I’ve only got 1360 MTU. I have the MC888 5G hub and it’s setup with a wired connection to my Xbox. 

I spoke to someone on live chat and they said there’s nothing they can do, I’d need to go to someone in store so they can take a look at it. Is there anything that can be done? 

this is the only reason I bought it so will just return if I can’t resolve the issue.

[Joemac1999]

Also having what I believe to be the same issue. My friend and I live next door to each other, both with Three 5g broadband and have both been experiencing major lag spikes and high latency. Neither of us had issues with it before and both been with Three for 2 years. Only issue I can identify is with MTU. Issues have been ongoing for about a week now

[NobodyUK]

Youmight be able to get the MTU up to scratch and then keep a ping going sending packets at 1492 bytes. You have to keep pinging with a slightly higher value until you reach the max.

I'm not sure if it would apply to all devices on the LAN though.

Using "three.co.uk" APN does seem to keep the proper MTU size. I think the option is under broadband and then cellular APN.