Comtech EF Data CDM-570 - Manual (Page 244)

CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Ethernet IP Module Interface MN/CDM570L.IOM
13–38
Terrestrial Interface
Use the Interface Type drop-down menu to select the operating terrestrial interface:
• EIA-422/EIA530 DEC • V.35 DCE • EIA-232 (sync)
• G.703 T1 AMI • G.703 T1 B8ZS • G.703 E1 Unbal AMI
• G.703 E1 Unbal HDB3 • G.703 E1 Bal AMI • G.703 E1 Bal HDB3
Satellite (WAN)
HDLC addressing only applies with IP Module V1/MPP-50 FW Ver. 1.6.# and
earlier, and with IP Module V2/MPP-70 FW Ver. 2.1.# and earlier.
HDLC addresses are not used with Streamline Encapsulation, which applies
with IP Module V1/MPP-50 FW Ver. 1.7.# and later, and with IP Module
V2/MPP-70 FW Ver. 2.2.# and later.
• HDLC Address Mode – Select Small Network Mode, Large Network Mode, or Point-to-
Point Mode.
• Receive HDLC Addresses (Hex) (read-only) – Indicates the HDLC Address that the WAN
Interface will listen to (i.e., pass traffic). This should match the HDLC Address specified for
traffic to pass from the sending modem.
• Network Mode Address Ranges (read-only) – The Hex address ranges for Large and Small
Network Modes are provided here for reference purposes.
VLAN Brouter
• VLAN Brouter Mode – Use the drop-down menu to Enable or Disable this mode. If
enabled, any packet arriving at the Ethernet interface with a VLAN header will be
automatically forwarded to the WAN interface. In this mode, ALL VLAN packets are sent;
there is no filtering of any kind unless VLAN Filter is otherwise enabled.
• VLAN Brouter Tx Payload Compression – Use the drop-down menu to Enable or Disable
Payload Compression for all "Brouted" packets. Because the modem is really in router mode,
all non-VLAN traffic would check the associated router to turn on/off payload compression.
• VLAN Brouter Next Hop MAC Address – On the downlink side, this attribute allows the
operator to define the next hop router to which all of the Brouted packets must be sent. This
allows the Brouter feature to bypass the need to send an ARP packet for packets that could
potentially have the same IP address.
• VLAN Filter – Use the drop-down menu to Enable or Disable the filtering of "Brouted"
packets. This will permit the bridging of VLAN destination packets and the routing of non-
VLAN traffic using static route table information.
Use of the VLAN Filtering feature requires operation in Large Network
Mode to support the full 12-bit VLAN IDs field.