Comtech EF Data CDM-570L - Figure 16-4. Router Mode, Partial Mesh, 1½ Hop Diagram

CDM-570/570L Satellite Modem with Optional IP Module Revision 4
Typical IP Module Operation Setups MN/CDM570L.IOM
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.
Additional remote sites can be added through a dedicated RX Only CDM-IP, such as the
CDD-564/L or CDD-562L, at the hub for each remote.
Figure 16-4. Router Mode, Partial Mesh, 1½ Hop Diagram
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.
Satellite
10/100 BaseT LAN
10.10.0.0 /16
PC
IP 10.10.1.100/16
GW 10.10.1.1
Satellite dish
TX
RX
RX
10/100 BaseT LAN
10.20.0.0 /16
Satellite dish
PC
IP 10.20.1.100/16
GW 10.20.1.1
10/100 BaseT LAN
10.30.0.0 /16
PC
IP 10.30.1.100/16
GW 10.30.1.1
Satellite dish
Remote B, CDM-IP 4
(efi0) 10.30.1.1/16
RX
TX
Static Routes
IP Dest Next Hop Type
10.10.0.0/16 0x01 ToSat
10.20.0.0/16 0x01 ToSat
RX HDLC Addresses - 0x03
Remote A, CDM-IP 3
(efi0) 10.20.1.1/16
RX
TX
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
Remote B, CDM-IP 5 (RX Only)
(efi0) 10.30.1.2/16
RX
Static Routes
IP Dest Next Hop Type
0.0.0.0/0 10.30.1.1 ToEth
RX HDLC Addresses - 0x03
Hub CDM-IP 2 (RX Only)
(efi0) 10.10.1.2/16
Static Routes
IP Dest Next Hop Type
0.0.0.0/0 10.10.1.1 ToEth
RX HDLC Addresses - 0x01
Hub CDM-IP 1
(efi0) 10.10.1.1/16
Static Routes
IP Dest Next Hop Type
10.20.0.0/16 0x02 ToSat
10.30.0.0/16 0x03 ToSat
RX HDLC Addresses - 0x01
2
0
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