Re: IPV6 Doubt

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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