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On May 27 and 28, the router would go offline periodically, and not be pingable from the local network at address 192.168.0.5 (cbr400). From the web interface (http://cbr400), System Settings -> System Control -> Advanced, I turned off "Enable Watchdog Reboot" to see if that would help. The CBR400 stayed up all night. When we arrived at the trailer (9:20) it was pingable, but the web interface would not respond. Tom reported that the internet was not available. However the router_check.sh script on the high dsm, which runs every 15 minutes, did not report a problem in pinging eol or google.
The 3G modem has been working fine. On the web interface for the CBR400, the signal strength is typically -75 dBm, with 4 bars.
The 4G modem does not always connect. The status page shows a signal level of -79 to -84 dBm, which I presume is acceptable.
The CBR400 sends log messages to the syslog on "flux". The 4G modem is known as "WAN:9d7c85c4". The logs show "carrier reject"., and that it reverts back to 1XRTT (2G):
Code Block | ||
---|---|---|
| ||
fgrep CBR /var/log/messages | fgrep 5c4 May 28 16:45:12 cbr400.isfs.ucar.edu (CBR400-afa) WAN:9d7c85c4: Connection Change : None -> EVDO, % May 28 16:45:12 cbr400.isfs.ucar.edu (CBR400-afa) WAN:9d7c85c4: Connect Event: carrier reject May 28 16:45:12 cbr400.isfs.ucar.edu (CBR400-afa) WAN:9d7c85c4.CPPM: state=connecting result=carrier reject May 28 16:45:19 cbr400.isfs.ucar.edu (CBR400-afa) WAN:9d7c85c4: Connect Event: carrier reject May 28 16:45:19 cbr400.isfs.ucar.edu (CBR400-afa) WAN:9d7c85c4.CPPM: state=connecting result=carrier reject May 28 16:45:44 cbr400.isfs.ucar.edu (CBR400-afa) WAN:9d7c85c4: Connection Change : EVDO -> 1XRTT, % |
I plan to contact Verizon and see if they can help from their end concerning the 4G modem.
Morning of May 29:
Upgraded firmware on CBR400 to version 4.3.0
Speed tests: http://www.dslreports.com/speedtest?flash=1
state | download | upload | latency |
---|---|---|---|
3G connected (EVDO), 4G disabled | 413,444 | 380,309 | 121,107 |
4G connected (1xRTT), 3G disabled | 58 | 127 | 485 |
Until we can get the 4G modem to do better than 1xRTT, we'll use the 3G and disable the 4G.
Here is the display of Status -> Internet Connections -> "Modem: Novatel Wireless CDMA" with an EVDO connection:
Here is the display of Status -> Internet Connections -> "Modem: Novatel Wireless 4G", in the disabled state:
May 30, Gordon
The cellular worked quite well yesterday, but not so hot today, frequent disconnects. I tried enabling the watchdog reset on the CBR but then disabled it again after several hours since it didn't help. The router_check.sh script on the "high" dsm is our own watchdog reset.
While on the tower, I checked the antenna cable connections at the modems, and the usb connections at the hug. All looked good.
TODO: look at the logs. Perhaps the signal levels were lower today? Contact verizon about 4G.