MTU (Maximum Transfer Unit) refers to the largest size of the datagram that a layer of a communication protocol can transmit.
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What is the relation between interface MTU and received packets length?
Let's say that two hosts A and B communicate via an Ethernet medium. Host A has MTU 1500 and host B has MTU 1300.
If A is sending a packet with length 1500, will host B receive it?
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OpenVPN and PPPoE
For the past month or so I've been smashing my head into my desk trying to setup an OpenVPN server on a PPPoE connection. Instead of the standard 1500 MTU, PPPoE has a 1492 MTU, which causes all kinds ...
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how to set MTU value in windows xp
I wish to change the MTU value on my pc (XP)
i tried some registry mathods- added some values in several places:
(this one is a windows tutorial)
...
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Connection reset error 101 when loading a website
I have a problem with Internet connection. When I try to load a website, it will always show this error:
Error 101 (net::ERR_CONNECTION_RESET): Connection was reseted.
I'm using Windows 7 64-bit ...
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TP Link wireless router connects but web pages do not load
i have recently purchased TP-Link TL-WR740N but somehow it is not working properly.
I do not have ISP connection rather i have fixed IP connectivity so that i get a 100Mbps ethernet cable coming for ...
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How to configure a large mtu (linux)
I have a gigabit ethernet connection from my laptop to my router, and a working ipv6 connection to the internet. I can receive very large packets from sites on the internet, with sizes up to at least ...
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161 views
Why might my HP C7200 printer appear to have an MTU of 1498?
On my wireless network, I can tracepath to a mac using MTU of 1500 on Ubuntu linux 12.04.
(Mac MTU is set to 1470 for some reason, but reply frames are not that big so this does not matter)
When I ...
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1answer
583 views
OS X Failure in Path Maximum Transmission Unit (PMTU) Black Hole Router Detection
This all started when I was trying to download a podcast on my Mac. This happens in both Snow Leopard and Lion when the Ethernet interface is set to use Jumbo Frames.
prompt> curl -v -o x.mpg ...
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Unable to remotely connect to a machine after succesfull VPN login
I'm unable to remotely connect to a virtual machine even after successfully logging into VPN through my broadband connection. Weird it is, I'm able to remotely connect to that machine after VPN log in ...
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1answer
286 views
DF bit in Apache to Tomcat communication
Edited (edits are in italics):
In my configuration I have an Apache 2.2 Http Server configured as a reverse proxy *with mod_proky_jk*, that exposes http service from an Apache Tomcat 6 application ...
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390 views
Timeout while testing MTU via ping
I tested it on Windows 7 and Ubuntu 11.10 with MTU size 1500B.
IP packet - 20B
ICMP packet - 8B
1500 - 28 = 1472
So maximum packet that I could ping without fragmentation is 1472B, and this is ...
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Can't access some websites, possible MTU issue on the router?
Two particular sites that I can't access at all is css-tricks.com and jquery.com which are pretty crucial to me since I'm a web designer.
I talked with my ISP and we tried
Using different ...
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What is the most MTU efficient way of creating a network tunnel?
I am currently using SSH tunneling to connect to the internet via a remote computer using the -D ssh argument. I've recently run across a problem with this solution -- the SSH protocol decreases the ...
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1answer
483 views
MTU setting ignored by Java socket on loopback
I've got a mtu problem. I did the following:
root@sa-headend:/home/sa# ifconfig lo mtu 1500
root@sa-headend:/home/sa# ifconfig lo
lo Link encap:Lokale Schleife
inet ...
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3answers
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About MTU settings in machines and switch
Update: to be more realistic:
M1 Switch and M2 are all running on a 10G network, and we use ipv4.
The settings are:
M1 has MTU set to 1500
Switch has MTU set to 9000
M2 has MTU set to 9000
Does ...
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1answer
672 views
What layer does ifconfig operate at?
What layer does ifconfig operate at when setting a MTU. Does it set the MTU for the physical device (Network Interface Layer) or the MTU of the packet (Internet Layer)?
By executing
ifconfig eth0 ...
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Macbook Pro 2010 Ethernet Jumbo Frame(9k MTU) Support?
Has anyone been able to use jumbo frame support on their 2010 Macbook Pros? This is kind of negative news here, but I am seeing many reports that this is not available anymore due to Apple's choice ...
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Why does Mac OS X insist on changing my MTU to 1500?
Recently (I think after updating to 10.6.4) Mac OS X has insisted on changing my MTU to 1500, even though the router which my Mac connects to directly has an MTU of 1472. I've noticed that manually ...
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5answers
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How to tell what MTU is being used in Windows XP
I'm suffering from a really weird problem where I randomly get "The connection to the server was reset" errors when trying to access web pages (HTTP error 12031 according to the Windows network ...
