Troubleshooting
LTE troubleshooting tree
Digi 6350-SR/6355-SR LTE Router User Guide
53
n
If yes
, check if the IP Passthrough has been enabled.
l
If yes, are there any ports that are required but cannot be
accessed on the client device? Also check if the IP
Passthrough has been enabled.
o
If yes, check the Services section of the configuration.
Verify none of the services are reserving the ports needed
to access the client device.
o
If no, check the
Firewall -> Port Forwarding
section of
the configuration. Verify that the desired ports are
forwarded to the appropriate IP addresses.
l
If no, see if the client device is expecting a publicly reachable
and/or static IP address, check the SIM card and the
Modem
section of the configuration to verify both are set up with
the proper APN.
n
If no
, verify Ethernet ports for connection status and check
Cat5/ Cat6 cable integrity. Is IP Passthrough mode enabled?
l
If yes, clear DHCP leases by waiting 5 minutes, then reboot
the Digi 6350-SR/6355-SR. If clearing DHCP leases didn't fix
issue, check that the passthrough IP works with a /30
subnet. If not, contact carrier to change IP on SIM card (may
just need a reboot if using a standard APN).
l
If no, verify the
Network > Interfaces > LAN
section of the
config is setup with a static IP and the DHCP server is
enabled.
Online, but with VPN issues
Reduce the
Modem > MTU
option in the configuration to 1400.
Alternately, if you have control of the router connected to the Ethernet
port of the Digi 6350-SR/6355-SR, change that router's WAN MTU seting
to 1400.
Briefly online
1. Disconnect Ethernet cable from the Digi 6350-SR/6355-SR;
power cycle. Wait for the Digi 6350-SR/6355-SR to fully connect,
then reconnect Ethernet port.
2. Verify the Digi 6350-SR/6355-SR is using the correct APN (e.g. on
Verizon you can connect with the standard vzwinternet APN, but
the SIM card is meant to connect with a static APN such as
ne01.vzwstatic)
3. If that didn't fix the issue, try removing the 192.168.210.254 IP
address from the
Network > Interfaces > Default IP > Default
Gateway
option in the config.
4. If that didn't fix the issue, try disabling any/all connectivity tests
in the configuration profile (labelled "ping monitoring" or
"connectivity monitoring" in the config).
5. If that didn't fix the issue, contact the cellular provider to check
the SIM card's activation and provisioning status.
