Mailinglist Archive: opensuse (1599 mails)

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Re: [opensuse] how many folks running suse 11 are heavily into IPv6?
  • From: "John E. Perry" <j.e.perry@xxxxxxx>
  • Date: Sun, 18 Oct 2009 15:35:44 -0400
  • Message-id: <4ADB6E10.5060105@xxxxxxx>
Per Jessen wrote:
James Knott wrote:

Per Jessen wrote:
Adam Tauno Williams wrote:

]

* is faster for local transfers (gone are MTU/MRU & fragmentation
issues)

How does IPv6 do that - isn't MTU dependent on the ethernet packet
size and router support for the same?


When was the last time you saw anything that didn't support 1500 byte
MTU?

This morning :-)
I have an IPv4 setup which uses IPIP tunnels on the back of LVS, and
those tunnels reduce my MTU to 1440.

Still, how does IPv6 avoid MTU/MRU & fragmentation issues? PMTU is
surely still required.



...But isn't fragmentation a good thing? And isn't it good to be able to
specify how much fragmentation to allow? How, otherwise, does one avoid
a 50MB file transfer, for instance, locking up a 54Mbps wifi network for
10 seconds? Is provision made for such situations? If so, how does it
differ from MTU? Or does it defer all packet-splitting to the lower
levels? Are there any bottom-level protocols that don't split transfers
into packets?

totally ignorant of ipv6, and not very knowledgable about _any_ networking,

John Perry
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