[MVMA] The ETX of tunnels .vs. the ETX of microwave

[Chuck Gelm]

By static assignment, each tunnel has an ETX value of 0.1.
By static assignment, each microwave link has an ETX value of 1 or 
higher of LQ/NLQ<100%.

Tunnels will win the ETX race 99.99% of the time.

Latency can cause video glitches or audio drop-outs.
Let's take a look at latency on the network.
Here is an example traceroute test between
nc8q-services and wa8apb-services:

With the tunnel enabled between nc8q and (w8go and wx8a)
root at NC8Q-SERVICES:~# traceroute wa8apb-services
traceroute to wa8apb-services (10.104.249.244), 30 hops max, 38 byte packets
  1  dtdlink.NC8Q-hAP.local.mesh (10.218.93.193)  0.266 ms  0.224 ms 
0.157 ms
  2  mid1.w8go-Hub-hAP (172.31.187.169)  13.620 ms  16.492 ms  14.020 
ms         <- this path thought a hop to Clinton County then to Huber 
Heights is best
  3  mid1.W8BI-DARA-Services (172.31.114.241)  23.931 ms  28.659 ms 
25.986 ms
  4  dtdlink.KE8MVM-DARA-TO-XWARN.local.mesh (10.91.93.77)  42.054 ms  
24.208 ms  22.870 ms
  5  KE8MVM-XWARN-To-DARA.local.mesh (10.74.117.225)  24.205 ms 23.605 
ms  23.369 ms
  6  dtdlink.WA8APB-LHG-At-XeniaNorth-to-APB.local.mesh (10.74.61.92)  
32.224 ms  24.093 ms  33.534 ms
  7  WA8APB-LHG-To-XeniaNorth.local.mesh (10.85.6.187)  36.136 ms 29.008 
ms  25.973 ms
  8  WA8APB-Services.local.mesh (10.104.249.244)  26.898 ms  32.901 ms 
*28.151 ms <- average latency

*Let's drop the tunnel; nc8q to w8go:
**root at NC8Q-SERVICES:~# traceroute wa8apb-services
traceroute to wa8apb-services (10.104.249.244), 30 hops max, 38 byte packets
  1  dtdlink.NC8Q-hAP.local.mesh (10.218.93.193)  0.700 ms  0.158 ms 
0.156 ms
  2  mid1.WX8A-QTH-hAP (172.31.187.165)  42.323 ms  24.866 ms  22.401 ms 
<- this path picked up the WX8A tunnel. Clinton<>Clinton<>Huber Heights
  3  mid4.w8go-Hub-hAP (172.31.114.226)  40.410 ms  34.164 ms  32.631 ms
  4  mid1.W8BI-DARA-Services (172.31.114.241)  41.129 ms  55.015 ms 
41.616 ms
  5  dtdlink.KE8MVM-DARA-TO-XWARN.local.mesh (10.91.93.77)  41.819 ms  
43.693 ms  40.805 ms
  6  KE8MVM-XWARN-To-DARA.local.mesh (10.74.117.225)  48.688 ms 44.074 
ms  44.434 ms
  7  dtdlink.WA8APB-LHG-At-XeniaNorth-to-APB.local.mesh (10.74.61.92)  
42.077 ms  42.370 ms  58.287 ms
  8  WA8APB-LHG-To-XeniaNorth.local.mesh (10.85.6.187)  53.594 ms 50.565 
ms  45.683 ms
  9  WA8APB-Services.local.mesh (10.104.249.244)  47.334 ms  50.463 ms 
*51.410 ms <- average latency

*Let's drop both tunnels; w8go and wx8a:
**root at NC8Q-SERVICES:~# traceroute wa8apb-services
traceroute to wa8apb-services (10.104.249.244), 30 hops max, 38 byte packets
  1  dtdlink.NC8Q-Kettering-Centerville.local.mesh (10.132.89.57) 0.305 
ms  0.378 ms  0.335 ms
  2  NC8Q-Centerville-Kettering.local.mesh (10.110.156.47)  1.744 ms 
1.635 ms  1.550 ms
  3  dtdlink.KE8MVM-LHG-MVHS-XeniaNorth.local.mesh (10.253.119.123) 
1.792 ms  9.628 ms  1.884 ms
  4  KE8MVM-LHG-XeniaNorth-MVHS.local.mesh (10.252.120.191)  3.251 ms  
3.202 ms  3.014 ms
  5  dtdlink.WA8APB-LHG-At-XeniaNorth-to-APB.local.mesh (10.74.61.92)  
3.442 ms  3.438 ms  3.321 ms
  6  WA8APB-LHG-To-XeniaNorth.local.mesh (10.85.6.187)  5.675 ms 4.690 
ms  5.069 ms
  7  WA8APB-Services.local.mesh (10.104.249.244)  5.021 ms  4.939 ms 
*5.022 ms <- average latency with no tunnels*
root at NC8Q-SERVICES:~#

What services do you wish to access on the local network?

73, Chuck
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