[181573] in North American Network Operators' Group
Re: How long will it take to completely get rid of IPv4 or will it
daemon@ATHENA.MIT.EDU (Valdis.Kletnieks@vt.edu)
Sun Jun 28 12:34:59 2015
X-Original-To: nanog@nanog.org
To: Owen DeLong <owen@delong.com>
In-Reply-To: Your message of "Sun, 28 Jun 2015 08:02:52 -0700."
<76B79D10-2C57-403C-897C-3F1E902A17A9@delong.com>
From: Valdis.Kletnieks@vt.edu
Date: Sun, 28 Jun 2015 12:34:22 -0400
Cc: nanog@nanog.org, manning <bmanning@karoshi.com>
Errors-To: nanog-bounces@nanog.org
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On Sun, 28 Jun 2015 08:02:52 -0700, Owen DeLong said:
>=20
> > On Jun 27, 2015, at 11:48 , manning <bmanning=40karoshi.com> wrote:
> >=20
> > Quite a few folks actually. (the 802.5 & 802.4 specs)=85.
> > This is kind of like asking when we will stop using ethernet framing =
(ethernet was designed for a 3Mbps transmission rate)
> > yet we are deploying 100Gbps networks. Still stuck on that 1500byte =
limitation. When can we get rid of that?
>
> Many networks have=85 It=92s called =93Jumbo Frames=94
Unfortunately, enough people do things to break PMTU Discovery that it's =
not
usually feasible to send jumbograms outside your directly controlled netw=
orks.
So you may actually have jumbogram support all the way one end to the oth=
er,
but you can't rely on it and have to throttle back to 1500 (or even small=
er)
in self-defense....
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