fernando at gont.com.ar
Thu Aug 28 18:46:56 CDT 2008
At 08:44 p.m. 28/08/2008, Glen Kent wrote:
>I understand that routers usually must send this error only when a
>fragmentation is required and they recieve a packet with DF bit set.
>However, in this case this router would drop the packet (for it doesnt
>support fragmentation) and sending an ICMP error back to the host,
>warning it that its packets will get dropped seems to be a better
>OTOH, what do most of the implementations do if they send a regular IP
>packet and receive an ICMP dest unreachable - Fragmentation reqd
>message back? Do they fragment this packet and then send it out, or
>this message is silently ignored?
You may want to have a look at this IETF I-D:
The PMTUD modification described in the draft ships (at least) in
OpenBSD and NetBSD.
e-mail: fernando at gont.com.ar || fgont at acm.org
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