Lutron Telnet not working reliably

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1

I have the Pro Hub, both hubitat C7 and that hub are plugged into same switch and UPS.
It intermittenly connects via Telnet. What causes this

dev:672022-04-06 03:23:22.465 pm errorTelnet connect failed, trying again in 60 seconds...
dev:672022-04-06 03:23:22.462 pm infoLutron Telnet is still offline
dev:672022-04-06 03:22:22.028 pm errorTelnet connect failed, trying again in 60 seconds...
dev:672022-04-06 03:22:22.025 pm infoLutron Telnet is still offline
dev:672022-04-06 03:21:22.242 pm errorTelnet connect failed, trying again in 60 seconds...
dev:672022-04-06 03:21:22.238 pm infoLutron Telnet is still offline
dev:672022-04-06 03:20:22.029 pm errorTelnet connect failed, trying again in 60 seconds...
dev:672022-04-06 03:20:22.026 pm infoLutron Telnet is still offline
dev:672022-04-06 03:19:22.147 pm errorTelnet connect failed, trying again in 60 seconds...
dev:672022-04-06 03:19:22.145 pm infoLutron Telnet is still offline
dev:672022-04-06 03:18:22.456 pm errorTelnet connect failed, trying again in 60 seconds...
dev:672022-04-06 03:18:22.452 pm infoLutron Telnet went offline
dev:672022-04-06 02:34:08.172 pm infoTelnet connection to Lutron interface established
dev:672022-04-06 02:34:08.102 pm infoLutron Telnet went online
dev:672022-04-06 02:33:07.721 pm errorTelnet connect failed, trying again in 60 seconds...
dev:672022-04-06 02:33:07.718 pm infoLutron Telnet is still offline
dev:672022-04-06 02:32:07.613 pm errorTelnet connect failed, trying again in 60
2

Bad ethernet cable (Hubitat or Lutron), bad link speed... its definitely an ethernet issue.

3 Likes
3

In addition to what @mike.maxwell suggested, it could also be an issue with the switch (or switch port).

2 Likes
4

Is your switch a managed switch? I had an odd issue with telnet between HE and Envisalink a ways back. I tried all sorts of stuff but finally ended up disabling STP and LLDP-MED. I have no idea WHY that resolved the issue but it did. I think it's much more likely to be something else (like a cable or negotiation etc) and I did not do the same thing for my Lutron hub. But if you try all those and nothing gets better you might want to try those.

1 Like
5

@jack4 what make/model switch?

I would start with the ethernet cable as @mike.maxwell suggested.

Try grabbing a small switch and swapping it out to see if the issue continues.

1 Like
6

I don't think it is bad ethernet on hubitat, otherwise I would have problems connecting to web interface.
I have tried 3 different cables on Lutron Pro.
It is cheap unmanaged TP Link TL-SG116.
from my desktop to the lutron pro:
ING 192.168.1.25 (192.168.1.25) 56(84) bytes of data.
64 bytes from 192.168.1.25: icmp_seq=1 ttl=64 time=0.391 ms
64 bytes from 192.168.1.25: icmp_seq=2 ttl=64 time=0.366 ms
64 bytes from 192.168.1.25: icmp_seq=3 ttl=64 time=0.361 ms
64 bytes from 192.168.1.25: icmp_seq=4 ttl=64 time=0.406 ms
64 bytes from 192.168.1.25: icmp_seq=5 ttl=64 time=0.427 ms
64 bytes from 192.168.1.25: icmp_seq=6 ttl=64 time=0.348 ms
64 bytes from 192.168.1.25: icmp_seq=7 ttl=64 time=0.386 ms
64 bytes from 192.168.1.25: icmp_seq=8 ttl=64 time=0.323 ms

7

Ignore my comments about LLDP and STP... :slight_smile:

9

Here is packet capture from my opnsense router on Lutron Hub IP

1 0.000000 192.168.1.25 192.168.1.1 ICMP 98 Echo (ping) request id=0x0404, seq=1/256, ttl=2 (reply in 2)
2 0.000038 192.168.1.1 192.168.1.25 ICMP 98 Echo (ping) reply id=0x0404, seq=1/256, ttl=64 (request in 1)
3 0.199312 192.168.1.25 192.168.1.1 DNS 101 Standard query 0x5ffd A firebaseinstallations.googleapis.com.1615
4 0.199382 192.168.1.1 192.168.1.25 DNS 176 Standard query response 0x5ffd No such name A firebaseinstallations.googleapis.com.1615 SOA a.root-servers.net
5 0.695955 192.168.1.25 192.168.1.1 DNS 87 Standard query 0x7831 A android.googleapis.com.1615
6 0.696046 192.168.1.1 192.168.1.25 DNS 162 Standard query response 0x7831 No such name A android.googleapis.com.1615 SOA a.root-servers.net
7 2.461880 192.168.1.25 192.168.1.1 DNS 84 Standard query 0x282f A app-measurement.com.1615
8 2.461907 192.168.1.1 192.168.1.25 DNS 159 Standard query response 0x282f No such name A app-measurement.com.1615 SOA a.root-servers.net
9 2.694181 192.168.1.25 192.168.1.1 DNS 78 Standard query 0x036f A ad.doubleclick.net
10 2.694243 192.168.1.1 192.168.1.25 DNS 115 Standard query response 0x036f A ad.doubleclick.net CNAME dart.l.doubleclick.net A 142.251.45.70
11 2.821314 192.168.1.25 192.168.1.1 DNS 84 Standard query 0x7c27 A play.googleapis.com.1615
12 2.821384 192.168.1.1 192.168.1.25 DNS 159 Standard query response 0x7c27 No such name A play.googleapis.com.1615 SOA a.root-servers.net
13 5.214655 192.168.1.25 192.168.1.1 DNS 101 Standard query 0x5ffd A firebaseinstallations.googleapis.com.1615
14 5.214689 192.168.1.1 192.168.1.25 DNS 176 Standard query response 0x5ffd No such name A firebaseinstallations.googleapis.com.1615 SOA a.root-servers.net
15 5.702890 192.168.1.25 192.168.1.1 DNS 87 Standard query 0x7831 A android.googleapis.com.1615
16 5.702959 192.168.1.1 192.168.1.25 DNS 162 Standard query response 0x7831 No such name A android.googleapis.com.1615 SOA a.root-servers.net
17 7.460618 192.168.1.25 192.168.1.1 DNS 84 Standard query 0x282f A app-measurement.com.1615
18 7.460696 192.168.1.1 192.168.1.25 DNS 159 Standard query response 0x282f No such name A app-measurement.com.1615 SOA a.root-servers.net
19 7.703864 192.168.1.25 192.168.1.1 DNS 78 Standard query 0x036f A ad.doubleclick.net
20 7.703896 192.168.1.1 192.168.1.25 DNS 115 Standard query response 0x036f A ad.doubleclick.net CNAME dart.l.doubleclick.net A 142.251.45.70
21 7.828173 192.168.1.25 192.168.1.1 DNS 84 Standard query 0x7c27 A play.googleapis.com.1615
22 7.828227 192.168.1.1 192.168.1.25 DNS 159 Standard query response 0x7c27 No such name A play.googleapis.com.1615 SOA a.root-servers.net
23 8.825149 192.168.1.25 35.172.243.85 TCP 66 51486 → 8883 [ACK] Seq=1 Ack=1 Win=2180 Len=0 TSval=5367141 TSecr=3009498954
24 8.867221 35.172.243.85 192.168.1.25 TCP 66 [TCP ACKed unseen segment] 8883 → 51486 [ACK] Seq=1 Ack=2 Win=174 Len=0 TSval=3009513993 TSecr=5361128
25 10.135501 192.168.1.25 192.168.1.1 ICMP 98 Echo (ping) request id=0x0405, seq=1/256, ttl=3 (reply in 26)
26 10.135531 192.168.1.1 192.168.1.25 ICMP 98 Echo (ping) reply id=0x0405, seq=1/256, ttl=64 (request in 25)
27 12.707452 192.168.1.25 192.168.1.1 DNS 83 Standard query 0x3327 A ad.doubleclick.net.1615
28 12.707497 192.168.1.1 192.168.1.25 DNS 158 Standard query response 0x3327 No such name A ad.doubleclick.net.1615 SOA a.root-servers.net
29 12.917581 192.168.1.25 192.168.1.1 DNS 82 Standard query 0x6597 A android.googleapis.com
30 12.917631 192.168.1.1 192.168.1.25 DNS 98 Standard query response 0x6597 A android.googleapis.com A 142.250.114.95
31 13.655792 192.168.1.25 35.172.243.85 TLSv1.2 97 [TCP Previous segment not captured] , Application Data
32 13.698633 35.172.243.85 192.168.1.25 TLSv1.2 97 [TCP ACKed unseen segment] , Application Data
33 13.698983 192.168.1.25 35.172.243.85 TCP 66 51486 → 8883 [ACK] Seq=33 Ack=32 Win=2180 Len=0 TSval=5367628 TSecr=3009518824
34 17.715950 192.168.1.25 192.168.1.1 DNS 83 Standard query 0x3327 A ad.doubleclick.net.1615
35 17.716025 192.168.1.1 192.168.1.25 DNS 158 Standard query response 0x3327 No such name A ad.doubleclick.net.1615 SOA a.root-servers.net
36 17.921295 192.168.1.25 192.168.1.1 DNS 82 Standard query 0x6597 A android.googleapis.com
37 17.921323 192.168.1.1 192.168.1.25 DNS 98 Standard query response 0x6597 A android.googleapis.com A 142.250.114.95
38 20.280959 192.168.1.25 192.168.1.1 ICMP 98 Echo (ping) request id=0x0406, seq=1/256, ttl=4 (reply in 39)
39 20.281001 192.168.1.1 192.168.1.25 ICMP 98 Echo (ping) reply id=0x0406, seq=1/256, ttl=64 (request in 38)
40 22.732078 192.168.1.25 192.168.1.1 DNS 84 Standard query 0x0e97 A www.googleadservices.com
41 22.732167 192.168.1.1 192.168.1.25 DNS 148 Standard query response 0x0e97 A www.googleadservices.com A 142.250.138.157 A 142.250.138.155 A 142.250.138.156 A 142.250.138.154
42 22.926962 192.168.1.25 192.168.1.1 DNS 87 Standard query 0x2443 A android.googleapis.com.1615
43 22.927037 192.168.1.1 192.168.1.25 DNS 162 Standard query response 0x2443 No such name A android.googleapis.com.1615 SOA a.root-servers.net
44 24.460751 192.168.1.25 192.168.1.1 DNS 84 Standard query 0x147e A ssl.google-analytics.com
45 24.460802 192.168.1.1 192.168.1.25 DNS 144 Standard query response 0x147e A ssl.google-analytics.com CNAME ssl-google-analytics.l.google.com A 142.251.35.200
10

Yeah, well telnet isnt as gracious as http, no harm in replacing the cable.

1 Like
11

Try another switch. I used to have the same switch and it was not cooperating with my HE/Phillips Hue bridge.

2 Likes
12

What is a telnet command I can try from my desktop?

Never mind search on duck duck go revealed some commands

13

It appears to be working again. I'm not sure if rebooting the Lutron Pro Hub it or changing the ethernet cable on the Lutron Hub fixed it.

2 Likes