Cisco Systems UBR924 Manual De Usuario

 Troubleshooting Tips for the Cisco uBR924 Cable Access Router 51

   Maximum Burst Size

Maximum number of mini-slots that can be transmitted during this burst type. When 
the interval type is Short Data Grant, this value must be greater than 0. If this value is 
0, the burst size is limited elsewhere. 

   Guard Time Size

Amount of time in symbols between the center of the last symbol of a burst and the 
center of the first symbol of the preamble of an immediately following burst in an 
upstream transmission from the Cisco uBR924 to the CMTS.

   Last Codeword Length

Indicates whether or not the length of the last codeword is fixed or shortened. 
(1 = fixed; 2 = shortened) 

   Scrambler on/off

Indicates whether or not a scrambler is enabled in the upstream modulator. 
(1 = on; 2 = off)

Network Access

Indicates whether or not the Cisco uBR924 has access to the HFC network.

Vendor ID

Unique identifier specifying the cable modem manufacturer.

Auth. Wait Timeout

Number of seconds the Cisco uBR924 waits for a reply after sending the 
Authorization Request message to the CMTS.

Reauth. Wait Timeout

Number of seconds the Cisco uBR924 waits for a reply after it has sent an 
Authorization Request message to the CMTS in response to a reauthorization request 
or an Authorization Invalid message from the CMTS.

Auth. Grace Time

Number of seconds before the current authorization is set to expire that the grace 
timer begins, signaling the Cisco uBR924 to begin the reauthorization process.

Op. Wait Timeout

Number of seconds the TEK state machine waits for a reply from the CMTS after 
sending its initial Key Request for its SID’s keying material.

Retry Wait Timeout

Number of seconds the TEK state machine waits for a replacement key for this SID 
after the TEK grace timer has expired and the request for a replacement key has been 
made.

TEK Grace Time

Number of seconds before the current TEK is set to expire that the TEK grace timer 
begins, signaling the TEK state machine to request a replacement key.

Auth. Reject Wait Time

Number of seconds the Cisco uBR924 waits before sending another Authorization 
Request message to the CMTS after it has received an Authorization Reject message.

Assigned SID

Service ID assigned by the CMTS for the corresponding service class.

Max Downstream Rate

Maximum downstream rate in bits per second that the CMTS is permitted to forward 
to CPE unicast MAC addresses learned or configured as mapping to this 
Cisco uBR924. (This does not include MAC packets addressed to broadcast or 
multicast MAC addresses.)

Max Upstream Rate

Maximum upstream rate in bits per second that the Cisco uBR924 is permitted to 
forward to the RF network. This includes packet PDU data packets addressed to 
broadcast or multicast addresses.

Upstream Priority

Relative priority assigned to this service class for data transmission in the upstream 
channel. Higher numbers indicate higher priority.

Min Upstream Rate

Date rate in bits per second that will be guaranteed to this service class on the 
upstream channel.

Max Upstream Burst

Maximum transmit burst in bytes allowed for this service class on the upstream 
channel.

Privacy Enable

Indicates whether or not Baseline Privacy is enabled for this service class.

Ranging Backoff Start

Initial back-off window for initial ranging contention, expressed as a power of 2. 
Valid values are from 0 to 15.