mtu question

Jack Bates jbates at
Wed Nov 17 15:02:22 CST 2010

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,


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