Comtech EF Data CDM-IP 300L - Manual (Page 33)

CDM-IP 300L IP-Centric Satellite Modem Rev. 1
CD/CDMIP300L.IOM
5
IMPORTANT
Do not enable IF Loopback (or link the TX to RX by a BNC cable or satellite) on a
CDM-IP operating in easyConnect
 when connected to a LAN. In this configuration,
easyConnect  will resend all layer 2 broadcast packets and cause a “broadcast
storm” on the LAN. To perform a loop test to verify the modem or satellite link, do one
of the following:
1. Reconfigure the CDM-IP to CDM-300L Emulation Mode by selecting
Configuration/Interface and then selecting EIA-422/530, V.35, or EIA-232.
2. Set the CDM-IP to Router Mode.
1.3.6 CDM-IP W
ORKING
M
ODES AND
HDLC A
DDRESSING
M
ODES
There are two Working Modes of the CDM-IP available: easyConnect  and Router
Mode. There are also three HDLC Addressing Modes: Point-to-Point, Small Network,
and Large Network. This section will describe the functionality of these modes in order
to optimize the CDM-IP modems in your network.
IMPORTANT
The Working Mode and HDLC Address Mode of the CDM-IP modems must be
identical to pass traffic between modems.
Changing the Working Mode or HDLC address Mode of the CDM-IP modem requires
the CDM-IP module to be rebooted. Before the user can select a different mode, the
CDM-IP will notify the user that changing the mode will require a reboot.
easyConnect
 - This is the default Working Mode of the CDM-IP. easyConnect only
operates in Point-to-Point Mode, meaning that it is only communicating with one other
CDM-IP modem. This mode allows the CDM-IP to be setup with minimal configuration
(no specific routes need to be configured). In this mode, the CDM-IP is acting as a “smart
wire” over a satellite link between two CDM-IP modems. This allows the CDM-IP to
simultaneously forward IP traffic and non-IP traffic, such as IPX.