Page 114 of 378 ITG Engineering Guidelines
553-3001-202 Standard 1.00 April 2000
Measure intranet QoS
You can measure end-to-end delay and error characteristics of the current
state of the intranet. The se m e as u re ments help you set acc ep t ab le Qo S
standards when u sing the corporat e intranet to tr ansmit voice serv ices.

Measure end-to-end network delay

The basic tool used in IP networks to measure end-to-end network dela y is
the program. takes a delay sa mp le by sending an IC MP packet
from the host of the program to a destination server. then waits
for the packet to make a round trip. The output of is like the following:
The time field displays the round trip time (rtt).
So that the delay sample res ults match wh at the IT G node can exp eri ence, the
host must be on a working LAN segment attached to the router
intended to support the ITG node. The selection of destination host is just as
important, following these same guidelines for the source host.
The size of the probe packets must be set to 60 bytes to approximate
the size of probe packets sent by the ITG that are used in determining when
new calls need to fall back.