Working Modes - Streamline Encapsulation; Managed Switch Mode - Comtech EF Data CDM-570 Installation And Operation Manual

CDM-570/570L Satellite Modem with Optional IP Module
Appendix G
Working Mode
HDLC Address Mode
Large Network
Router + Brouter
Feature Support
security, performance and efficiency. These features are supported in the two working modes as
follows:
Feature
HDLC Address Mode
10/100 BaseT Operation
Access Lists
3xDES Encryption
Quality of Service
Header Compression
Payload Compression
Multicast
IGMP
Remote upgrade by FTP
G.3.2 Working Modes – Streamline Encapsulation
Streamline Encapsulation is available only in Ethernet IP Module V1/MPP-50
FW Ver. 1.7.# and later, and Ethernet IP Module V2/MPP-70 FW Ver. 2.2.# and
later.
The Comtech Streamline Encapsulation method was developed to provide a low overhead method
of transporting any size packetized data. It provides superior performance on small packets and
performs well on large packets, with overhead performance approaching 1%. With respect to
HDLC, Comtech Streamline Encapsulation outperforms the longtime industry standard on all
packet sizes.
Network Topology
All sites on different LAN subnet
Point-to-Point – Large Network
–
The IP Module has several standard and optional features to further optimize

Managed Switch Mode

Point-to-Point Only
10 or 100BaseT
Half or Full Duplex
None
1 Encrypt Decrypt
All traffic encrypted when enabled
Min/Max; Max/Priority; DiffServ
Yes – Layer 2 is always compression.
Applied to all Layers 3, 4, and 5 traffic
when enabled
Yes - applied to all traffic when
enabled
Select either all or no Multicast, Uplink
or Downlink
No
Yes
Router Mode
Point-to-Point, Small Network, Large
Network (can be Point-to-MultiPoint)
10 or 100 BaseT
Half or Full Duplex
4 Clients by IP or IP Subnet
Up to 8 Encrypt Decrypt Keys or random
Traffic encrypted on a per route basis
Min/Max; Max/Priority; DiffServ
Yes – applied on a per route basis
Yes – applied on a per route basis
All or specific Multicast streams, Uplink or
Downlink
Yes
Yes
G–3
Revision 12
MN/CDM570L.IOM
Ethernet Traffic
IP v4 + VLAN