System Manual

3.8 Network
3.8.1 Internet
This tab is used to configure the CPE networking mode (e.g Router/NAT vs. L2 bridge mode).
3.8.1.1 Router/ NAT mode
The following parameters should be configured (please, refer to the settings shown in the below
screenshot):
Connection Mode – defines the CPE networking mode. Should be set to "Router/ NAT"
NAT Mode – enables/ disables NAT functionality. Should be checked.
MGMT and Data interface – enables Management and Data (router) functions to use the same
("combined") or different ("separate") WAN-side interfaces. When configured in "separate" mode,
multiple PDNs (one for Management and one for Data) must be configured. The default PDN is for
Management and additional PDN is for data traffic. For "single PDN" mode, set this parameter to
"combined".
Device Name, Host Name and Domain Name are optional parameters, used e.g. in DHCP.
Recommended to leave the default values.
MTU – defines the Maximum Transmit Unit (maximum IP-level datagram size) before IP-layer
fragmentation. 3GPP recommends use of 1400 bytes (default) to avoid packet drops and
fragmentation on S1-U interface between eNB and EPC. Use the default value (1400).
IP Type – defines the IP stack of the CPE. The following values are available – IPv4, IPv6, IPv4v6 (dual
stack). Set to IPv4.