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Master

Dec 02, 2018

Solved

Understanding Orbi Radio (Fronthaul + Backhaul)

Here is a summary of my understanding of Orbi Radio. I will list them below and I hope that this will help to understan how Orbi works and thus to help in troubleshooting connectivity issues: 1...

Features

ekhalil
Dec 21, 2018
More information:

You can use telnet to Orbi to see all the radio channels (IP links) as follows:

root@RBR50:/# ip link show

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18: ath0: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN mode DEFAULT group default link/ether 7e:d2:94:ba:08:dc brd ff:ff:ff:ff:ff:ff (Fronthaul 2.4GHz)

19: ath01: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN mode DEFAULT group default link/ether 82:d2:94:ba:08:dc brd ff:ff:ff:ff:ff:ff (Backhaul 2.4GHz)

20: ath02: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN mode DEFAULT group default link/ether 86:d2:94:ba:08:dc brd ff:ff:ff:ff:ff:ff(Backhaul-ADD 2.4GHz)

21: ath1: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN mode DEFAULT group default link/ether 78:d2:94:ba:08:de brd ff:ff:ff:ff:ff:ff (Fronthaul 5GHz)

22: ath11: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN mode DEFAULT group default link/ether 7e:d2:94:ba:08:de brd ff:ff:ff:ff:ff:ff (Backhaul-ADD5GHz)

23: ath2: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN mode DEFAULT group default link/ether 78:d2:94:ba:08:df brd ff:ff:ff:ff:ff:ff (Backhaul 5GHz)

So the name of the radio channels according to the wifi scan in the picture in the previous post will be as follows:

ath0 (Fronthaul 2)

ath01 (Backhaul 2)

ath02 (Backhaul 4)

ath1 (Fronthaul 1)

ath11 (Backhaul 3)

ath2 (Backhaul 1)

ekhalil

Master

Dec 21, 2018

More information:

You can use telnet to Orbi to see all the radio channels (IP links) as follows:

root@RBR50:/# ip link show

18: ath0: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN mode DEFAULT group default link/ether 7e:d2:94:ba:08:dc brd ff:ff:ff:ff:ff:ff (Fronthaul 2.4GHz)

19: ath01: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN mode DEFAULT group default link/ether 82:d2:94:ba:08:dc brd ff:ff:ff:ff:ff:ff (Backhaul 2.4GHz)

20: ath02: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN mode DEFAULT group default link/ether 86:d2:94:ba:08:dc brd ff:ff:ff:ff:ff:ff(Backhaul-ADD 2.4GHz)

21: ath1: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN mode DEFAULT group default link/ether 78:d2:94:ba:08:de brd ff:ff:ff:ff:ff:ff (Fronthaul 5GHz)

22: ath11: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN mode DEFAULT group default link/ether 7e:d2:94:ba:08:de brd ff:ff:ff:ff:ff:ff (Backhaul-ADD5GHz)

23: ath2: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UNKNOWN mode DEFAULT group default link/ether 78:d2:94:ba:08:df brd ff:ff:ff:ff:ff:ff (Backhaul 5GHz)

So the name of the radio channels according to the wifi scan in the picture in the previous post will be as follows:

ath0 (Fronthaul 2)

ath01 (Backhaul 2)

ath02 (Backhaul 4)

ath1 (Fronthaul 1)

ath11 (Backhaul 3)

ath2 (Backhaul 1)

ekhalil

Master

Dec 21, 2018

Also you can use the following command to see the transmission power on all radio links (backhaul and fronthaul):

root@RBR50:~# iwlist ath2 txpower

ath2 8 available transmit-powers :
0 dBm (1 mW)
6 dBm (3 mW)
10 dBm (10 mW)
14 dBm (25 mW)
18 dBm (63 mW)
22 dBm (158 mW)
26 dBm (398 mW)
30 dBm (1000 mW)
Current Tx-Power:30 dBm (1000 mW)

ekhalil
Master
Dec 26, 2018
A good illustration for Orbi wireless architecture: