Chapter 37: Service Class Names
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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Parameter
Keyword Syntax
Purpose
NomGrantInterval
[grant-int <value>]
Specifies the nominal interval (in units of microseconds) between successive data
grant opportunities for this Service Flow. Required for Unsolicited Grant Services
(UGS) and UGS Activity Detection (UGS/AD)
TolGrantJitter
[grant-jitter <value>]
Specifies the maximum amount of time (in microseconds) that the transmission
opportunities may be delayed from the nominal periodic schedule for this Service
Flow. Required for UGS and UGS/AD
GrantsPerInterval
[grants-per-int
<value>]
For UGS, the value of this parameter indicates the actual number of data grants per
NominalGrant Interval. For UGS/AD, the value of this parameter indicates the
maximum number of Active Grants per Nominal Grant Interval. This is intended to
enable the addition of sessions to an existing UGS Flow via the Dynamic Service
Change mechanism, without negatively impacting existing sessions.
TosAndMask
TosOrMask
[and-mask <value>]
[or-mask <value>]
IP Type of Service overwrite. Enables C4/c CMTS to overwrite original Type of
Service (ToS) byte with new value.
RequestPolicyOct
[req-policy <value>]
Specifies which IUC opportunities the CM uses for upstream transmission requests
and packet transmissions for this Service Flow, whether requests for this Service
Flow may be piggybacked with data and whether data packets transmitted on this
Service Flow can be concatenated, fragmented, or have payload headers
suppressed.
Upstream and
Downstream Flow
Parameters
Peak Rate
peak-tr-rate <value>
This is the peak rate in bps that can be achieved beyond TMAX after the burst
(max-tr-burst) has been used. For example, if TMAX = 2 Mbps and Max-tr-burst = 8
MB = 64 Mbits, then you could set the Peak Rate to 6 Mbps. Since we have 64
Mbits available in the burst, we will transmit at Peak at 6 Mbps for 16 seconds,
then fall back to 2 Mbps.