VMG1312-B10A: QoS: Difference between revisions

Here we are running a backup job, an rsync (over ssh). Just after 7am QoS is disabled for around 30 minutes. The latency (blue) immediatlyimmediately jumps up to an average of 350ms. It was less than 20ms with QoS enabled.

[[File:ZyXEL-VMG1312-Affect_of_QoS.png|none|frame|Graph showing affect of enabling the 'Packet Length' QoS. When disabled, high latency and slight packetloss. Once enabled, online activity was unaffected by the 10Mb10Mbit/s upload.]]

With QoS enabled simply based on packet size internet activity is unaffected but a large upload happening at the same time. The example above shows a 40/10 FTTC line with a 10Mb10Mbit/s rsync backup upload happening. With QoS disabled there is terrible latency (blue), a small about of packet loss (red at the top) and generally, the internet access is affected quite a lot. With QoS based on packet size enabled, VoIP traffic is unaffected and general internet access such as streaming carries on as normal. The ZyXEL is able to manage the upload as it knows what the speed of the line is and gives priority to small packets which tend to be protocols that require near real-time responses.

[[Category:ZyXEL_VMG1312ZyXEL VMG1312|QoS]]