[132202] in North American Network Operators' Group
Re: mtu question
daemon@ATHENA.MIT.EDU (Jack Bates)
Wed Nov 17 16:02:30 2010
Date: Wed, 17 Nov 2010 15:02:22 -0600
From: Jack Bates <jbates@brightok.net>
To: Deric Kwok <deric.kwok2000@gmail.com>
In-Reply-To: <AANLkTim5o-vWL35+ttk0VfxPscPR81KSSi=_f3+3Bc0Z@mail.gmail.com>
Cc: nanog list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 11/17/2010 11:08 AM, Deric Kwok wrote:
> Hi
>
> I just see that the mtu in lo is different from standard eth 1500
>
> Any meaning of it?
>
You transfer huge amounts of data on loopbacks similar to sockets.
Supporting large MTU's is appropriate, and given the virtual nature of
loopbacks, is probably generally designed to handle the buffers that
transfer the data.
> How about cisco / juniper loopback?
>
> Thank you so much
Juniper M120: Type: Loopback, MTU: Unlimited
Cisco 7206 12.2SRE: MTU 1514 bytes, BW 8000000 Kbit/sec, DLY 5000 usec,
Jack
