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Re: [RRG] Re: [RAM] Tunneling overheads and fragmentation

To: Iljitsch van Beijnum <iljitsch at muada.com>
Subject: Re: [RRG] Re: [RAM] Tunneling overheads and fragmentation
From: Dino Farinacci <dino at cisco.com>
Date: Tue, 11 Sep 2007 14:41:31 -0700
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Cc: RAM Mailing List <ram at iab.org>, Robin Whittle <rw at firstpr.com.au>
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References: <469F7673.6070702@firstpr.com.au> <20070720140433.GA69215@Space.Net> <46A21AD6.2060501@firstpr.com.au> <0857530C-5C9D-4D29-ACAB-16A99CBFD929@muada.com> <46E6992D.2090501@firstpr.com.au> <46E6F514.1030206@gmail.com> <DCE587FE-A4E1-48AB-B378-44A163E2C227@muada.com>

Granted, this is a fairly old box in a small network, but I don't see anyone seriously claiming that ALL ISP networks support packets larger than 1500 bytes on ALL their internal links (and also on inter-ISP links).

I did a survey about a month ago and it is true. I will yield to those folks who responded to me to protect their privacy. ;-)

But the main gist was:

o We are going to 9K MTUs on all our internal links.
o Where we don't have 9K MTUs, we use 4470.
o Virtually no one runs ISP links at 1500.

Dino

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Follow-Ups:
- Re: [RRG] Re: [RAM] Tunneling overheads and fragmentation
  - From: Dino Farinacci
- Re: [RRG] Re: [RAM] Tunneling overheads and fragmentation
  - From: Iljitsch van Beijnum

References:
- [RAM] Tunneling overheads and fragmentation
  - From: Robin Whittle
- Re: [RAM] Tunneling overheads and fragmentation
  - From: Gert Doering
- Re: [RAM] Tunneling overheads and fragmentation
  - From: Robin Whittle
- Re: [RAM] Tunneling overheads and fragmentation
  - From: Iljitsch van Beijnum
- Re: [RRG] Re: [RAM] Tunneling overheads and fragmentation
  - From: Iljitsch van Beijnum

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