Re: IPV6 Doubt

So, don't forget to allow icmp type 3 code 4, "fragmentation needed but DF
bit set" at your ACLs in order to get your goal ;)
IPv6 suppose that everything but routers has enabled this feature.
HTH too

2011/6/7 Joe Astorino <joeastorino1982_at_gmail.com>

> From reading this document it seems that path MTU discovery (PMTUD) is a
> way
> for routers to determine the maximum IP MTU they can use along a path.
> Seems it is only possible for TCP traffic according to the doc which makes
> sense because if you send a TCP segment and it is higher than the outgoing
> MTU at some point along the path, you should get an ICMP message back
> saying
> so and be able to retransmit that segment. "ip tcp path-mtu-discovery"
> seems to be the same basic concept but for router initiated traffic.
>
> Now, for IPv6 I believe that the PMTUD function is moved off of the routers
> and on to the hosts but basically that is how I read things here.
>
>
> http://www.cisco.com/en/US/tech/tk827/tk369/technologies_white_paper09186a00800d6979.shtml#t4
>
> HTH
>
>
> On Tue, Jun 7, 2011 at 11:04 AM, Routing Freak <routingfreak_at_gmail.com
> >wrote:
>
> > Hi fellows,
> > I am searching for a command to enable path mtu discovery in IPV6.
> > I want to know the difeerence between ip mtu discovery and ip tcp path
> mtu
> > discovery
> >
> > Can some one point out the difference.
> >
> >
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> --
> Regards,
>
> Joe Astorino
> CCIE #24347
> Blog: http://astorinonetworks.com
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