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JinTu's avatar
JinTu
Star
Aug 26, 2021

LM1200 repeatedly dropping link

I recently purchased an LM1200-100NAS to serve as an LTE failover connection for my homelab and noticed a strange issue while setting up my pfSense-based router to use the LM1200 as a secondary WAN c...
Firmware
Hardware
Troubleshooting
Serdar's avatar
Serdar
Aspirant
Nov 24, 2021

Having the same issue on Google Fi (which is actually T-Mobile, but a different APN).

  1. LM1200 is set as Router mode or Bridge Mode: Bridge Mode
  2. Carrier Name: Google Fi (on T-Mobile)
  3. APN name: h2g2
  4. IP Type: IPv4
  5. Is LM1200 connecting to WAN backhaul: No
  6. Router client brand and model: Netgate 7100 1U (pfSense Plus 21.05.1)
  7. Broadband modem brand and model: N/A (Fiber ONT)

Logs from pfSense:

Nov 21 01:01:55 pfsense kernel: e6000sw0port2: link state changed to DOWN
Nov 21 01:02:17 pfsense kernel: e6000sw0port2: link state changed to UP
Nov 21 02:50:06 pfsense kernel: e6000sw0port2: link state changed to DOWN
Nov 21 02:50:28 pfsense kernel: e6000sw0port2: link state changed to UP
Nov 21 05:14:39 pfsense kernel: e6000sw0port2: link state changed to DOWN
Nov 21 05:15:01 pfsense kernel: e6000sw0port2: link state changed to UP
Nov 21 07:02:51 pfsense kernel: e6000sw0port2: link state changed to DOWN
Nov 21 07:03:13 pfsense kernel: e6000sw0port2: link state changed to UP

 

JinTu's avatar
JinTu
Star
Nov 25, 2021
Serdar wrote:
  1. LM1200 is set as Router mode or Bridge Mode: Bridge Mode
  2. Carrier Name: Google Fi (on T-Mobile)
  3. Router client brand and model: Netgate 7100 1U (pfSense Plus 21.05.1)

Logs from pfSense:

Nov 21 01:01:55 pfsense kernel: e6000sw0port2: link state changed to DOWN
Nov 21 01:02:17 pfsense kernel: e6000sw0port2: link state changed to UP
Nov 21 02:50:06 pfsense kernel: e6000sw0port2: link state changed to DOWN
Nov 21 02:50:28 pfsense kernel: e6000sw0port2: link state changed to UP
Nov 21 05:14:39 pfsense kernel: e6000sw0port2: link state changed to DOWN
Nov 21 05:15:01 pfsense kernel: e6000sw0port2: link state changed to UP
Nov 21 07:02:51 pfsense kernel: e6000sw0port2: link state changed to DOWN
Nov 21 07:03:13 pfsense kernel: e6000sw0port2: link state changed to UP

 

I am seeing the same thing on Verizon with pfSense, but was able to temporarily work around it by manually releasing and relinquishing the DHCP lease, then forcing a renew. Sometimes it requires doing this a few times for it to work, but once the link stabilizes, it stays up.