User's Manual

Troubleshooting
Configuration and Troubleshooting Commands
Chapter 8218
NOTE For non-DDN configured interfaces, all remote hosts must have entries
in the IP-to-X.121 address map table. Remote hosts not on your X.25
network (that is, on the other side of gateways) do not need to have map
table entries. For more information, refer to the routing description in
this section.