Cisco Broadband Cable Command Reference Guide

Chapter 5 Cable CPE Commands
show controllers cable-modem lookup-table
Syntax Description
Command Modes Privileged EXEC
Command History
OL-1581-05
show controllers cable-modem lookup-table
To display the mini-slot lookup table for the router’s cable interface, use the show controllers
cable-modem lookup-table command in privileged EXEC mode.
Cisco uBR904, uBR905, uBR924, uBR925 cable access routers, Cisco CVA122 Cable Voice Adapter
show controllers cable-modem number lookup-table
number Identifies the cable interface (always 0).
Release Modification
11.3(4)NA This command was introduced for the Cisco uBR904 cable access router.
12.0(4)XI1 Support was added for the Cisco uBR924 cable access router.
12.1(3)XL Support was added for the Cisco uBR905 cable access router.
12.1(5)XU1 Support was added for the Cisco CVA122 Cable Voice Adapter.
12.2(2)XA Support was added for the Cisco uBR925 cable access router.
Usage Guidelines This command displays the details of the lookup table. The driver uses this table to convert the size of
the packets that the router wants to transmit into a bandwidth request to the CMTS in mini-slots. The
contents of this table are affected by the upstream symbol rate that is negotiated between the CMTS and
the cable access router.
Use this table to look up the packet size and determine how many mini-slots will be needed.
Examples The following shows a typical mini-slot lookup table as displayed by the show controllers
cable-modem lookup-table command:
Router# show controllers cable-modem 0 lookup-table
Max Burst Size (minislots) = 0x6
Max Burst Length (bytes) = 0x4B
PHY Overhead Lookup Table:
000: 01 06 06 06 06 06 06 06 06 06 06 06 06 06 06 06
010: 06 06 06 06 06 06 06 06 06 06 06 06 06 06 06 06
020: 06 06 06 06 06 06 06 06 06 06 06 06 06 06 06 06
030: 06 06 06 06 06 06 06 06 06 06 06 06 06 06 06 06
040: 06 06 06 06 06 06 06 06 06 06 06 06 10 10 10 10
050: 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
060: 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
070: 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
080: 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
090: 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
Cisco Broadband Cable Command Reference Guide
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