Comtech EF Data SLM-5650A Vipersat - Manual (Page 116)

ToS Switching
B-18 Vipersat SLM-5650A User Guide
The information below can be used to convert between various formats:
Convert from ToS to DSCP - Divide the ToS decimal value by 4
Example : Convert a ToS decimal value of 184 to DSCP
DSCP = 184/4
DSCP = 46
Converting ToS and DSCP to/from Binary - Figure B-9 provides an example of
the conversion to and from binary and can also be used to convert to and from
ToS and DHCP values.
Figure B-9 ToS and DSCP Conversion Chart
Mesh Setup Based on ToS Detection
The detection of a ToS stamped packet by a remote modem has the ability to set
up a Single Hop On Demand (SHOD) mesh connection from that remote to
another remote within the network. These SHOD connections assumes that each
remote site that is part of the SHOD connection has at minimum one additional
demodulation configured as a Remote Expansion.
When a remote modem detects a packet that has been stamped with a ToS value
that matches the user defined value, the modem will look at the destination IP
address within the packet. The remote modem will then send an switch request
to the VMS requesting the user defined bandwidth. The switch request also
contains the destination address that the ToS stamped packet was destined for.
The VMS processes the switch request and compares the destination address to
the list of known subnets to determine if the destination belongs to another
remote within the network. If the address does belong to another remote the
VMS will look for available hardware and bandwidth and then issue tuning
commands to setup the connection. Each direction of the mesh is setup indepen-
dently, i.e. detection that occurs at remote 1 will establish a connection from