Metrics

Making sense of LQ ILQ and ETX in OLSR

You will see a table like this in the OLSR status screen on Freifunk

Topology entries

Destination IP Last hop IP LQ ILQ ETX

10.51.1.13 10.51.1.10 1.00 1.00 1.00

10.51.1.20 10.51.1.10 1.00 1.00 1.00 10.51.1.1 10.51.1.13 0.90 1.00 1.11 10.51.1.10 10.51.1.13 1.00 1.00 1.00 10.51.1.12 10.51.1.13 1.00 0.90 1.11 10.51.1.14 10.51.1.13 0.90 1.00 1.11 10.51.1.20 10.51.1.13 1.00 1.00 1.00 10.51.1.13 10.51.1.14 1.00 0.90 1.11 10.51.1.1 10.51.1.20 0.90 0.75 1.49 10.51.1.10 10.51.1.20 1.00 1.00 1.00 10.51.1.12 10.51.1.20 1.00 1.00 1.00 10.51.1.13 10.51.1.20 1.00 1.00 1.00

LQ = The percentage of packets that are succesfully sent from youself to the neighbour ILQ = The percentage of packets that succesfully are sent from your neighbour to yourself also often called NLQ

ETX = Expected Trasnmission count = How many trasnmission attempts are required to get packets through = 1 / (LQ*ILQ)