what is ipg or ewma in ping result ?

mohtashami · 10-11-2005, 04:45 AM

when ping is called in flooding mode (-f), in the result there is 'ipg' and 'ewma' that thers is not any thing about them in manpage of ping ( and about 'mdev' in ping result ).

sclarke · 09-23-2007, 03:51 PM

From Wikipedia:

Quote:

Ethernet devices must allow a minimum idle period between transmission of Ethernet frames known as the interframe gap (IFG) or interpacket gap (IPG). It provides a brief recovery time between frames to allow devices to prepare for reception of the next frame. The minimum interframe gap is 96 bit times (the time it takes to transmit 96 bits of raw data on the medium), which is 9.6 μs for 10 Mbit/s Ethernet, 960 ns for 100 Mbit/s (fast) Ethernet, and 96 ns for 1 Gbit/s (gigabit) Ethernet.

and

Quote:

The resulting ping statistics then include ipg/ewma which report the Interpacket Gap and the "Exponential Weighted Moving Average"