IP Fragmentation

Valdis.Kletnieks at vt.edu Valdis.Kletnieks at vt.edu
Wed Aug 20 13:04:13 CDT 2008


On Wed, 20 Aug 2008 21:43:44 +0530, Glen Kent said:
> Do transit routers in the wild actually get to do IP fragmentation
> these days? I was wondering if routers actually do it or not, because
> the source usually discovers the path MTU and sends its data with the
> least supported MTU. Is this true?

Hypothetically true.  Unfortunately, enough places do bozo firewalling and drop
the ICMP Frag Needed packets to severely limit the utility of PMTU Discovery.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 226 bytes
Desc: not available
URL: <http://mailman.nanog.org/pipermail/nanog/attachments/20080820/1669e31d/attachment.bin>


More information about the NANOG mailing list