ZyXEL Communications ISG50-ISDN User Manual page 768

Chapter 61 Troubleshooting
• Make sure the cellular interface has the correct user name, password, and PIN code configured
with the correct casing.
• If the ISG50 has multiple WAN interfaces, make sure their IP addresses are on different subnets.
I cannot configure a particular VLAN interface on top of an Ethernet interface even though I
have it configured it on top of another Ethernet interface.
Each VLAN interface is created on top of only one Ethernet interface.
The ISG50 is not applying an interface's configured ingress bandwidth limit.
At the time of writing, the ISG50 does not support ingress bandwidth management.
The ISG50's performance seems slower after configuring ADP.
Depending on your network topology and traffic load, applying an anomaly profile to each and
every packet direction may affect the ISG50's performance.
The ISG50 routes and applies SNAT for traffic from some interfaces but not from others.
The ISG50 automatically uses SNAT for traffic it routes from internal interfaces to external
interfaces. For example LAN to WAN traffic. You must manually configure a policy route to add
routing and SNAT settings for an interface with the Interface Type set to General. You can also
configure a policy route to override the default routing and SNAT behavior for an interface with the
Interface Type set to Internal or External.
The ISG50 is not applying a policy route's port triggering settings.
You also need to create a firewall rule to allow an incoming service.
I cannot get Dynamic DNS to work.
• You must have a public WAN IP address to use Dynamic DNS.
• Make sure you recorded your DDNS account's user name, password, and domain name and have
entered them properly in the ISG50.
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ISG50 User's Guide