INS_RL1000GW_REV– 15 Jul 2016 PAGE 162
INSTALLATION AND OPERATION MANUAL
RL1000GW
TECH SUPPORT: 1.888.678.9427
Backup and redundancy
Backup between Interfaces (between GSM or Physical interface)
A cellular link is by nature a high cost path and with a significant lower bandwidth then a physical
channel.
When the cellular link is to be used for backup to a physical link then resilient routing protocols
can determine the primary and backup paths.
Figure 10 : L3 protection
Modem conditional reload
In case the modem is continuously unsuccessful in establishing a connection and retrieving an IP
from the ISP, a reload can be trigger to the router.
A configuration parameter “retry-threshold-reload” is available to be set between 0 (disabled) and
30, whereas values 1-30 represents the number of consecutives failures.
A typical flow is as follow:
»
Once a SIM is in “CONNECTING…” and instead of reaching “CONNECTED” has reached
“FAILED”. Such attempt is approximately 2 minutes long (non configurable).
»
The counter progresses with every such above condition and summarize for both Sims
together.
»
The following states will reset the counter: “CONNECTED”, “CONNECTED AS
ALTERNATIVE”,”CONNECTED AS SECONDARY”.
NOTE: The quality echo tests are applicable when the status of the SIM is “CONNECTED”.
At “connected” state, the “retry-threshold-reload” counter is cleared. This means the
quality tests have no direct influence on this counter.