I have just added a router to my (originally) 2-router BATMAN mesh setup. So:
New: Linksys E8450 router
Existing: Two Xiaomi AX9000 routers
Before when there were only two routers in the mesh network, they communicate flawlessly - iperf3 tests getting no retries.
After adding the Linksys router to the mix, while the two AX9000 can still iperf3 one another with no retries, the test from Linksys shows this:
root@Repeater_E8450:~# iperf3 -c 192.168.1.254
Connecting to host 192.168.1.254, port 5201
[ 5] local 192.168.1.251 port 51314 connected to 192.168.1.254 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 22.4 MBytes 187 Mbits/sec 0 754 KBytes
[ 5] 1.00-2.00 sec 31.8 MBytes 266 Mbits/sec 0 1.04 MBytes
[ 5] 2.00-3.00 sec 34.1 MBytes 286 Mbits/sec 0 1.09 MBytes
[ 5] 3.00-4.00 sec 28.1 MBytes 236 Mbits/sec 0 1.22 MBytes
[ 5] 4.00-5.00 sec 31.1 MBytes 261 Mbits/sec 0 1.29 MBytes
[ 5] 5.00-6.00 sec 30.1 MBytes 253 Mbits/sec 0 1.29 MBytes
[ 5] 6.00-7.00 sec 31.2 MBytes 262 Mbits/sec 0 1.29 MBytes
[ 5] 7.00-8.00 sec 25.2 MBytes 212 Mbits/sec 0 1.29 MBytes
[ 5] 8.00-9.00 sec 25.5 MBytes 214 Mbits/sec 0 1.29 MBytes
[ 5] 9.00-10.00 sec 26.5 MBytes 222 Mbits/sec 0 1.29 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 286 MBytes 240 Mbits/sec 0 sender
[ 5] 0.00-10.01 sec 283 MBytes 237 Mbits/sec receiver
iperf Done.
root@Repeater_E8450:~# iperf3 -c 192.168.1.254 -R
Connecting to host 192.168.1.254, port 5201
Reverse mode, remote host 192.168.1.254 is sending
[ 5] local 192.168.1.251 port 58330 connected to 192.168.1.254 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 7.00 MBytes 58.7 Mbits/sec
[ 5] 1.00-2.00 sec 9.25 MBytes 77.6 Mbits/sec
[ 5] 2.00-3.00 sec 7.50 MBytes 62.9 Mbits/sec
[ 5] 3.00-4.00 sec 8.88 MBytes 74.4 Mbits/sec
[ 5] 4.00-5.00 sec 8.25 MBytes 69.2 Mbits/sec
[ 5] 5.00-6.00 sec 9.75 MBytes 81.8 Mbits/sec
[ 5] 6.00-7.00 sec 7.50 MBytes 62.9 Mbits/sec
[ 5] 7.00-8.00 sec 9.38 MBytes 78.6 Mbits/sec
[ 5] 8.00-9.00 sec 9.00 MBytes 75.5 Mbits/sec
[ 5] 9.00-10.00 sec 10.4 MBytes 87.0 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 87.5 MBytes 73.4 Mbits/sec 563 sender
[ 5] 0.00-10.00 sec 86.9 MBytes 72.9 Mbits/sec receiver
iperf Done.
From the perspective of the AX9000 router:
Accepted connection from 192.168.1.251, port 51298
[ 5] local 192.168.1.254 port 5201 connected to 192.168.1.251 port 51314
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 19.0 MBytes 159 Mbits/sec
[ 5] 1.00-2.00 sec 32.5 MBytes 273 Mbits/sec
[ 5] 2.00-3.00 sec 33.0 MBytes 277 Mbits/sec
[ 5] 3.00-4.00 sec 29.0 MBytes 243 Mbits/sec
[ 5] 4.00-5.00 sec 31.8 MBytes 266 Mbits/sec
[ 5] 5.00-6.00 sec 28.9 MBytes 242 Mbits/sec
[ 5] 6.00-7.00 sec 31.1 MBytes 261 Mbits/sec
[ 5] 7.00-8.00 sec 26.4 MBytes 221 Mbits/sec
[ 5] 8.00-9.00 sec 24.2 MBytes 203 Mbits/sec
[ 5] 9.00-10.00 sec 26.6 MBytes 223 Mbits/sec
[ 5] 10.00-10.01 sec 384 KBytes 348 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.01 sec 283 MBytes 237 Mbits/sec receiver
-----------------------------------------------------------
Server listening on 5201 (test #4)
-----------------------------------------------------------
Accepted connection from 192.168.1.251, port 58318
[ 5] local 192.168.1.254 port 5201 connected to 192.168.1.251 port 58330
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 7.25 MBytes 60.8 Mbits/sec 55 35.4 KBytes
[ 5] 1.00-2.00 sec 9.12 MBytes 76.5 Mbits/sec 49 56.6 KBytes
[ 5] 2.00-3.00 sec 7.75 MBytes 65.0 Mbits/sec 47 29.7 KBytes
[ 5] 3.00-4.00 sec 9.00 MBytes 75.5 Mbits/sec 53 32.5 KBytes
[ 5] 4.00-5.00 sec 8.12 MBytes 68.2 Mbits/sec 59 50.9 KBytes
[ 5] 5.00-6.00 sec 9.75 MBytes 81.8 Mbits/sec 54 38.2 KBytes
[ 5] 6.00-7.00 sec 7.50 MBytes 62.9 Mbits/sec 65 33.9 KBytes
[ 5] 7.00-8.00 sec 9.38 MBytes 78.6 Mbits/sec 58 50.9 KBytes
[ 5] 8.00-9.00 sec 9.25 MBytes 77.6 Mbits/sec 50 46.7 KBytes
[ 5] 9.00-10.00 sec 10.1 MBytes 84.9 Mbits/sec 73 39.6 KBytes
[ 5] 10.00-10.00 sec 256 KBytes 578 Mbits/sec 0 48.1 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 87.5 MBytes 73.4 Mbits/sec 563 sender
-----------------------------------------------------------
Server listening on 5201 (test #5)
-----------------------------------------------------------
No matter how close or how far I place the Linksys router to the AX9000 router, I still get similar results.
Before I chalk this up as a non-fixable H/W incompatibility problem, I would like to see if anything can be done to try and rectify this. Any input appreciated !