Specifications

DOCSIS 1.1 for Cisco uBR905 and Cisco uBR925 Cable Access Routers and Cisco CVA122 Cable Voice Adapters
Command Reference
104
Cisco IOS Release 12.2(15)CZ
Scheduling Type The type of service used on the upstream for grant requests:
• 1 = Undefined
• 2 = Best effort
• 3 = Non-real-time polling service (NRTPS)
• 4 = Real-time polling service (RTPS)
• 5 = Unsolicited grant service with activity detection (UGS-AD)
• 6 = Unsolicited grant service (UGS)
Request/Transmission
Policy
The allowable means of grant request and transmission on the upstream.
This value is a 9-bit mask where the bits have the following meanings
when set to 1:
• Bit 0 = Do not use broadcast request opportunities.
• Bit 1 = Do not use priority request multicast request opportunities.
• Bit 2 = Do not use Request/Data grants for requests.
• Bit 3 = Do not use Request/Data grants for data.
• Bit 4 = Do not piggyback data on grant requests.
• Bit 5 = Do not use concatenation.
• Bit 6 = Do not use DOCSIS fragmentation.
• Bit 7 = Do not use payload header suppression (PHS).
• Bit 8 = UGS service flows must drop packets that do not fit.
See Table 14 for the possible values of each bit for each of the supported
flow types.
Nominal Polling Interval The interval, in microseconds, between successive unicast grant requests
for the service flow on the upstream.
Tolerated Poll Jitter The maximum amount of time, in microseconds, that a unicast request
interval may be delayed from the typical polling schedule.
Unsolicited Grant Size The size of unsolicited grants, in bytes.
Nominal Grant Interval The interval, in microseconds, between successive data grant
opportunities for the service flow on the upstream.
Tolerated Grant Jitter The maximum amount of time, in microseconds, that transmission
opportunities may be delayed from the typical polling schedule.
Grants Per Interval The actual number of grants per Nominal Grant Interval for UGS service
flows, and the maximum number of active grants per Nominal Grant
Interval for UGS-AD service flows.
Max DS Latency The maximum latency, in microseconds, between the reception of a packet
by the CMTS on its network interface and the transmission of the packet
on its downstream cable interface.
Table 13 show controllers cable-modem service-flows Field Descriptions
Field Description