MTU Settings

[theone90]

MTU Settings??? ASUS RT-N66R

I have looked and I don't see the most old and standard feature. I would really like to be able to change my MTU on my ASUS RT-N66R as my ISP recommended.

 

[CooCooCaChoo]

I think firmware version 35 and higher allows you to change the MTU size. If you instead want to use an older firmware, you can use a script to set it or run it in the router setup page under run command.

 

[theone90]

my current firmware is 3.0.0.4.374_979 I don't see a run command option

 

[RMerlin]

Asus only lets you adjust it for PPPoE connections. Everything else is the default 1500 MTU recommended for Ethernet.

 

[theone90]

I wish I would've known before I made my purchase.. hopefully i'll be able to return it

 

[L&LD]

theone90, why don't you just use the RMerlin firmware instead?

 

[wouterv]

Recommending to change the MTU by your ISP for non PPPoE Internet connection types is odd, or even old fashioned.
It should work with the default MTU of 1500.
Why does the ISP recommend another setting?

 

[CooCooCaChoo]

Recommending to change the MTU by your ISP for non PPPoE Internet connection types is odd, or even old fashioned.
It should work with the default MTU of 1500.
Why does the ISP recommend another setting?

Yeah, unless your ISP's servers don't do packet fragmentation correctly for IPv4, there is no need to change the MTU.

 

[theone90]

theone90, why don't you just use the RMerlin firmware instead?

Not sure why my ISP recommends changing the MTU.. Im gonna try merlin's firmware and hopefully there's an option there.

 

[theone90]

installed the latest merlin firmware applied the applied the suggested MTU settings and the defalut 1500 is still enabled checked through xbox one

[/IMG]

 

[L&LD]

Not sure if it would make a difference; but is this after a reboot?

Is it possible that the Xbox One is not reporting this correctly? Maybe test it with another tool?

 

[sinshiva]

does the xbox one also not have the ability to manually set MTU?

the xbox should 'just work', but if it's more restrictive and it's also not letting you set mtu manually, then you will need to set it on the bridge and any other interfaces on every router between the modem and the xbox. you should also manually set this on every device on the lan, so nothing has to do extra processing.

it is a lot easier to just set it on the wan interface and all your client devices manually, though, for best performance. so i'd be sure microsoft didn't graciously add this capability to their new xbox

 

[theone90]

does the xbox one also not have the ability to manually set MTU?

the xbox should 'just work', but if it's more restrictive and it's also not letting you set mtu manually, then you will need to set it on the bridge and any other interfaces on every router between the modem and the xbox. you should also manually set this on every device on the lan, so nothing has to do extra processing.

it is a lot easier to just set it on the wan interface and all your client devices manually, though, for best performance. so i'd be sure microsoft didn't graciously add this capability to their new xbox

Sadly there is no option on the xbox one to change the MTU. on my previous router the xbox one indicated the current configured MTU and yes it does help out allot with latency

 

[sinshiva]

add this to /jffs/scripts/wan-start

#!/bin/sh
WANMTU=`nvram get wan_mtu`
ifconfig vlan1 mtu $WANMTU up
ifconfig eth1 mtu $WANMTU up
ifconfig eth2 mtu $WANMTU up
ifconfig br0 mtu $WANMTU up

chmod a+rx /jffs/scripts/*

this will set everything on the router to the MTU set on the WAN page of the webui

 

[theone90]

add this to /jffs/scripts/wan-start

#!/bin/sh
WANMTU=`nvram get wan_mtu`
ifconfig vlan1 mtu $WANMTU up
ifconfig eth1 mtu $WANMTU up
ifconfig eth2 mtu $WANMTU up
ifconfig br0 mtu $WANMTU up

chmod a+rx /jffs/scripts/*

this will set everything on the router to the MTU set on the WAN page of the webui

I gave those commands a try in telnet and they screwed with my NAT type and didnt change the MTU