Digi 6350-SR User Manual page 53

Troubleshooting
Digi 6350-SR/6355-SR LTE Router User Guide
If yes, check if the IP Passthrough has been enabled.
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If yes, are there any ports that are required but cannot be
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accessed on the client device? Also check if the IP
Passthrough has been enabled.
If yes, check the Services section of the configuration.
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Verify none of the services are reserving the ports needed
to access the client device.
If no, check the Firewall -> Port Forwarding section of
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the configuration. Verify that the desired ports are
forwarded to the appropriate IP addresses.
If no, see if the client device is expecting a publicly reachable
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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.
If no, verify Ethernet ports for connection status and check
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Cat5/ Cat6 cable integrity. Is IP Passthrough mode enabled?
If yes, clear DHCP leases by waiting 5 minutes, then reboot
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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).
If no, verify the Network > Interfaces > LAN section of the
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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.
LTE troubleshooting tree
53