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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Thoughts on increasing MTUs on the internet
I think it's a great idea operationally, less work for the routers and more efficient use of bandwidth. It would also be useful to devise some way to at least partially reassemble fragmented frames at links capable of large MTU's. Since most PC's are on a subnet with a MTU of 1500 (or 1519) packets would still be limited to 1500B or fragmented before they reach the higher speed links. The problem with bringing this to fruition in the internet is going to be cost and effort. The ATT's and Verizons of the world are going to see this as a major upgrade without much benefit or profit. The Cisco's and Junipers are going to say the same thing when they have to write this into their code plus interoperability with other vendors implementations of it.
Dear NANOGers, It irks me that today, the effective MTU of the internet is 1500 bytes, while more and more equipment can handle bigger packets. What do you guys think about a mechanism that allows hosts and routers on a subnet to automatically discover the MTU they can use towards other systems on the same subnet, so that: 1. It's no longer necessary to limit the subnet MTU to that of the least capable system 2. It's no longer necessary to manage 1500 byte+ MTUs manually Any additional issues that such a mechanism would have to address?
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