Ping Loss Quality
Want quick to grasp indicator of link quality
Loss is the most sensitive indicator
- Studies on economic value of response time by IBM showed there is a threshold around 4-5secs where complaints increase.
- loss of packet requires ~ 4 sec TCP retry timeout
- For packet loss we use following thresholds:
- 0-1% = Good 1-2.5% = Acceptable
- 2.5%-5% = Poor 5%-12% = Very Poor
- > 12% = Bad (unusable for interactive work)
Notes:
Above 4-6% packet loss video conferencing becomes irritating, and non native language speakers become unable to communicate.
The occurrence of long delays of 4 seconds or more at a frequency of 4-5% or more is also irritating for interactive activities such as telnet and X windows.
Above 10-12% packet loss there is an unacceptable level of back to back loss of packets and extremely long timeouts, connections may start to get broken, and video conferencing is unusable.