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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No computer on network can play YouTube videos

I have a Netgear FVG318v1 router and all computers on the network cannot play any YouTube videos. I have tried with 3 computers, PC and Mac with all different kinds of browsers. All I get from YouTube ...
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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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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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Ubuntu 10.04 | Terminal Freezes on certain commands | MTU

Isolated problem: I try to cat /etc/rc.local and I can't do anything in the ssh session after that. I've tried many of the common things, but it seems to freeze on any command, but I can do an ls, ...
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376 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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Do all hosts and nodes in a Broadcast domain have to have the same MTU value?

Some documents on the Internet say that all interfaces in a broadcast domain ( ie Router boundaries ) have to have the same MTU value. Is that an inflexible rule ? But what about my roaming laptop ...
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Throughput decreases after MTU 5000

I am trying to test throughput between two computers directly connected through 1 GbE and testing with iperf. I am getting a throughput around 980Mbps when MTU is between 5000 and 5050, however it ...
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Changing MTU on Windows 8

have tried several times to change the mtu on my windows 8 hp laptop, have used the method shown here- ...
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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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Do not fragment bit and windows 7

Recently had an issue where the DF bit was set to 1 going from a W7 workstation to the update server, the issue is it was sending 32K of data when the MTU was set to 1500. When the packet hits the NIC ...
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How to find proper MTU size for FTTH EPON?

I've recently moved to a ISP that provides a 4mbps connection through FTTH(Single OFC). There is a EPON ONU in my premise from which a RJ-45 lan cable is connected to my Intel DH67CL1 board based PC. ...
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POP3 randomly not accessible while SMTP still is

For at least a couple of months now, I have had a really strange problem. Most of the time, my email has worked properly, but occasionally it has played up – at those times I can send emails, but not ...
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SSH working, but SCP+git not working at all when network link is overloaded

SCP (and other programs that use SSH, like git) establishes a connection, but just sits there without doing anything. Using an SSH shell works fine. This only happens when the Ethernet network link ...
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36 views

Set an ipv6-specific MTU

I have a router which has ipv6 connectivity through a tunneling mechanism. The router announces a prefix in the LAN, and clients get native ipv6 connectivity on their point of view. The MTU of the LAN ...
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242 views

Why does postfix take so long time to receive emails from gmail?

How can I manually check for an email from the command line? How can I force postfix to receive/update emails? The email from gmail takes 8 minutes till it will be received by postfix. How can I ...
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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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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 ...