ipv6 fragmentation

hello experts,
IPv4 has the fragmentation field and ipv6 does not. How does ipv6 handle fragmentation?
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leblancAccountingAsked:
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PadawanDBAOperational DBACommented:
It's unnecessary in IPv6 as there is no fragmentation.  The source of the packet discovers the MTU for the links in its path and then sets the MTU accordingly, so there is no fragmentation.  See here for a good intro: http://www.cisco.com/en/US/docs/ios-xml/ios/ipv6/configuration/15-2s/ip6-mtu-path-disc.html
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aadihCommented:
Excerpt (from RFC):

"The Fragment header is used by an IPv6 source to send a packet larger than would fit in the path MTU to its destination.  (Note: unlike  IPv4, fragmentation in IPv6 is performed only by source nodes, not by routers along a packet's delivery path [...] The  Fragment header is identified by a Next Header value of 44 in the immediately preceding header, and has the following format [...]"

Reference: " Internet Protocol, Version 6 (IPv6) Specification":

http://tools.ietf.org/html/rfc2460 >
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PadawanDBAOperational DBACommented:
Good call, Aadih.  I see the error of my ways now (ie. not reading enough of an article - cardinal sin!)!
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aadihCommented:
Nah. There is no sin.  We are humans. :-)

[Note: I make such mistakes daily on this forum.]
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leblancAccountingAuthor Commented:
aadih,

which RFC is that for ipv6? Thanks
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aadihCommented:
[Don't understand the question. Sorry.]

Look at the link I provided. :-)
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leblancAccountingAuthor Commented:
rfc2460. Did not read the link carefully.
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aadihCommented:
That's a-okay.  Happens to all of us.  :-)
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