Comtech EF Data CDM-570A - Manual (Page 498)

CDM-570L/570AL Satellite Modem with Optional Packet Processor MN-CDM570A
Appendix D Revision 2
D–40
You must set the working mode for each modem as follows:
• Hub CDM-IP Modem – Router-Hub
• Hub CDD-564/L IP Quad Demodulator – Router
• Remote CDM-570A/570AL-IP Modem – Router-Remote
The Route Table entries are as follows:
• Hub CDM-IP Modem – One Route entry for each IP subnet at each remote site
• Hub CDD-564/L Demodulator – An Ethernet default route with a Next Hop being the IP of
the Hub CDM-570A/570AL
• Remote CDM-570A/570AL-IP Modem – A Satellite default route.
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’.