nanog mailing list archives

Re: IP Fragmentation

From: Valdis.Kletnieks () vt edu
Date: Wed, 20 Aug 2008 14:04:13 -0400

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.

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Current thread:

IP Fragmentation Glen Kent (Aug 20)
- Re: IP Fragmentation Jim Logajan (Aug 20)
  - Re: IP Fragmentation Glen Kent (Aug 28)
    - Message not available
    - Re: IP Fragmentation Fernando Gont (Aug 28)
    - RE: IP Fragmentation Tony Li (Aug 28)
    - Re: IP Fragmentation Glen Kent (Aug 28)
    - Re: IP Fragmentation Iljitsch van Beijnum (Aug 29)
    - Re: IP Fragmentation Valdis . Kletnieks (Aug 29)
- Re: IP Fragmentation Leo Bicknell (Aug 20)
  - Re: IP Fragmentation Jim Shankland (Aug 20)
- Re: IP Fragmentation Valdis . Kletnieks (Aug 20)
  - Re: IP Fragmentation Iljitsch van Beijnum (Aug 20)
    - Re: IP Fragmentation Sam Stickland (Aug 20)
    - Re: IP Fragmentation Fernando Gont (Aug 25)
    - Re: IP Fragmentation Iljitsch van Beijnum (Aug 25)
    - Re: IP Fragmentation Simon Leinen (Aug 26)
  - Re: IP Fragmentation Colin Alston (Aug 20)
- RE: IP Fragmentation John Lee (Aug 20)
  - RE: IP Fragmentation Tim Sanderson (Aug 20)