Figure 16-4. Router Mode, Partial Mesh, 1½ Hop Diagram - Comtech EF Data CDM-570 Installation And Operation Manual

CDM-570/570L Satellite Modem with Optional IP Module
Typical IP Module Operation Setups
Hub RX only CDM-IP 2 has a default route (ToEth) to Hub CDM-IP 1 because all
outbound traffic will go through CDM-IP 1.
Additionally, HDLC addresses can be used to select or filter multicast traffic on the hub
outbound common carrier. Hub CDM-IP 1 has two multicast routes defined with two
Next Hop HDLC addresses, 0x10 and 0x11. Remote CDM-IP 2 has RX HDLC Address
0x10 enabled to receive one of the multicast streams. Remote CDM-IP 3 has RX HDLC
Addresses 0x10 and 0x11 enabled to receive both of the multicast streams.
Additonal remote sites can be added through a dedicated RX Only CDM-IP at the hub for
each remote.
PC
IP 10.10.1.100/16
GW 10.10.1.1
Satellite dish
TX
Hub CDM-IP 1
(efi0) 10.10.1.1/16
Static Routes
IP Dest
10.20.0.0/16
10.30.0.0/16
RX HDLC Addresses - 0x01
IP Dest
0.0.0.0/0
RX HDLC Addresses - 0x01
Full or partial "Mesh Network" Configuration – The "Star Network" configuration
works for a "hub-centric" network, where all traffic is either coming to, or from, one
central hub. There are several ways to send traffic between remote sites.
RX
RX
Next Hop Type
0x02 ToSat
0x03 ToSat
Hub CDM-IP 2 (RX Only)
(efi0) 10.10.1.2/16
Static Routes
Next Hop Type
10.10.1.1 ToEth
Figure 16-4. Router Mode, Partial Mesh, 1½ Hop Diagram
Satellite
Satellite dish
TX
Remote B, CDM-IP 4
(efi0) 10.30.1.1/16
Static Routes
IP Dest Next Hop
10.10.0.0/16 0x01
10.20.0.0/16 0x01
RX HDLC Addresses - 0x03
Remote B, CDM-IP 5 (RX Only)
(efi0) 10.30.1.2/16
IP Dest
0.0.0.0/0
RX HDLC Addresses - 0x03
16–7
MN/CDM570L.IOM
PC
IP 10.20.1.100/16
Satellite dish
GW 10.20.1.1
TX
RX
Remote A, CDM-IP 3
(efi0) 10.20.1.1/16
Static Routes
IP Dest Next Hop Type
10.10.0.0/16 0x01 ToSat
10.30.0.0/16 0x03 ToSat
RX HDLC Addresses - 0x02
PC
IP 10.30.1.100/16
RX
GW 10.30.1.1
RX
Type
ToSat
ToSat
Static Routes
Next Hop Type
10.30.1.1 ToEth
Revision 3