User Manual

Table Of Contents
PremierWave EN User Guide 53
11: Tunneling
Tunneling allows serial devices to communicate over a network, without “being aware” of the
devices which establish the network connection between them. Tunneling parameters are
configured using the CLI Tunnel menu and submenus (see the PremierWave EN Command
Reference for the full list of commands.)
The PremierWave EN supports Connect Mode and Accept Mode connections, but only one
mode may be enabled at a time on each serial Line. The connections on one serial Line are
separate from those on another serial port.
Connect Mode: the PremierWave EN actively makes an outgoing network connection.
The remote node on the network must listen for the Connect Mode’s connection. Connect
Mode is disabled by default.
Accept Mode: the PremierWave EN listens for a network connection. A remote node on
the network initiates the connection. Accept Mode is enabled by default.
Connect Mode
For Connect Mode to function, it must be enabled, have a remote station (node) configured,
and a remote port configured (TCP or UDP). When enabled, Connect Mode is always on.
Enter the remote station as an IP address or DNS name. The PremierWave EN will not make
a connection unless it can resolve the address.
Connect Mode supports the following protocols:
TCP
UDP (available only in Connect Mode, since UDP is a connectionless protocol).
For Connect Mode using UDP, the PremierWave EN accepts packets from any device on the
network. It will send packets to the last device that sent it packets.
Note: The Port in Connect Mode is not the same port configured in Accept Mode.
The TCP keepalive time is the time in which probes are periodically sent to the other end of
the connection. This ensures the other side is still connected.
Connect Mode has two states:
Disabled (no connection)
Always (always makes a connection)
Accept Mode
In Accept Mode, the PremierWave EN waits for a connection from the network. The
configurable local port is the port the remote device connects to for this connection. There is
no remote port or address. The default local port is 10001 for serial line 1, 10002 for serial
line 2, and 10003 for serial line 3.
Accept Mode supports the following protocols: