Comtech EF Data turboIP v4.0 - Manual (Page 49)

turboIPv4.0 Revision 6
Configuring turboIP ™ MN/TURBOIP.IOM
4–21
Example 1 – If a pair of turboIPs’ were used to accelerate TCP traffic on a satellite
link where satellite modem A has a TX data rate of 12 Mbps and satellite modem B
has a TX data rate of 2048 kbps, the WAN setting for turboIP A would be 12 Mbps
and would be 2048 kbps for turboIP B.
Example 2 – If a turboIP was in place at a hub where there were three outbound
satellite links to three separate remotes with the following links;
Link A – Hub 4 Mbps Outbound, Remote A 1536 kbps Inbound
Link B – Hub 3 Mbps Outbound, Remote B 1024 kbps Inbound
Link A – Hub 2 Mbps Outbound, Remote C 768 kbps Inbound
The Hub turboIP WAN would be set to 9 Mbps to equal the total available
Outbound bandwidth (4 + 3 + 2). In this example, Selective Acceleration Rules
would need to be created to limit the bandwidth to match the Outbound TX data rate
for each Remote. The Remote TurboIP WAN setting would be set to the Inbound
TX data rate to the Hub.
4.5.3.2 M
AXIMUM
T
RANSFER
U
NIT
(MTU)
This setting enables the turboIP to better support interoperability with other IP
devices requiring less than 1500-byte TCP payloads. Default setting for the MTU is
1500 bytes.
4.5.3.3 C
OMPRESSION
With Compression enabled, the turboIP will compress accelerated TCP Data,
Compression is not applied to non-TCP or non accelerated TCP.
4.5.3.4 C
ONGESTION
C
ONTROL
Per-Connection Mode – Should be used to support dynamic bandwidth paths, where
the bandwidth may be different for any of the paths being accelerated by the turboIP.
Rate Pacing Mode– Should be when bandwidth path for accelerated TCP traffic
remains constant with the set WAN Transmission Rate. In Rate Pacing Mode, the
turboIP meters out bursty traffic at a rate not to exceed the configured transmission
rate of the satellite channel. This prevents the satellite channel from becoming
congested and will maximize accelerated TCP throughput to match the set WAN
Transmission Rate.