Router Mode (Brouter Enabled) - Point-To-Multipoint With Vlan Matching Filters - Comtech EF Data CDM-570A Installation And Operation Manual

Each CDM-IP would select the HDLC address associated with its site as a RX HDLC Address.
Therefore, for this case:
•
The Hub CDD-564/L Demodulators 1, 2, and 3 would have 0x01 as the first RX HDLC
Address;
•
Remote 'A' CDM-IP would have 0x02;
•
Remote 'B' CDM-IP would have 0x03;
•
Remote 'C' CDM-IP would have 0x04.
The Hub CDM-IP 1 has static routes defined for each of the remote CDM-IP subnets with the
Next Hop HDLC address being the HDLC address associated with the remote site. All three
remote CDM-IP modems have default routes to the satellite with the Next Hop HDLC address
being 0x01. The Hub CDD-564/L Demodulator has a default route (ToEth) to the Hub CDM-IP
modem because all outbound traffic will go through the CDM-IP modem.
Additional remote sites can be added through a dedicated demodulator at the hub for each
remote.
D.3.1.1.3.3 Router Mode (Brouter Enabled) – Point-to-MultiPoint with VLAN
Matching Filters
1. COMPATIBILITY NOTE – Brouter Point-to-MultiPoint Mode with VLAN
Matching Filters applies only to CDM-IPs and CDD-564/Ls. The entire
network must be configured to operate in the same mode – either entirely
configured to use VLAN Matching Filters, or entirely configured with
Filtering Disabled.
2. As the CDM-570A/570AL-IP can process six times (6X) the number of
packets more than the CDM-570/L, you may not need to use Brouter Mode.
In previous network configurations, ALL remote CDM-IP modems were required to process all
VLAN packets, and then decide whether to forward or discard. In some user applications, this
could result in very high processor utilization numbers and possibly result in 'overdriving' the
processor.
The Brouter (Bridged + Router Traffic) Working Mode with VLAN Filtering is a special mode of
operation where VLAN traffic is bridged and non-VLAN traffic is routed using static route table
information. This allows the user to optimally configure the networks to ensure that the remote
modem's Packet Processor is not 'overdriven'.
Optional High Performance Packet Processor
CDM-570L/570AL Satellite Modem with Optional Packet Processor
D–39
Revision 5
MN-CDM570A