[nsp] ICMP: time exceeded (reassembly)

Yuriy Vostrikoff mon at lcpi.ru
Sun Feb 8 16:01:09 EST 2004

"Bulger, Tim" <TBulger at ea.com> writes:

> http://www.cisco.com/warp/public/105/pmtud_ipfrag.html
 > Please observe example 4.  If DF bit is set in original packet, it is
> copied to tunnel packet header.  Of course this only applies to packets
> received that are less than the IP MTU of the tunnel as if they were
> larger than that, they would get dropped with 'fragmentation needed and
> DF set' ICMP message.

Just few lines above example 4.

The next example shows what happens when the router is acting in the
role of a sending host with respect to PMTUD and in regards to the
tunnel IP packet. This time the DF bit is set (DF = 1) in the original
IP header and we have configured the tunnel path-mtu-discovery command
so that the DF bit will be copied from the inner IP header to the
outer (GRE + IP) header

	Mon at phobos.loc
	Der kalte Mond in voller Pracht...
	The Moon is Waning Gibbous (93% of Full)

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