show controllers cable-modem des

pb_req_bytes_to_minislots=0x10

us_des_ctrl=0x00, us_des_sid_1= 0x1234 ds_unencrypted_length=0x0C

Table 8 briefly describes some of the fields shown in the display. For more information, see the

Broadcom documentation for the BCM3300 chip.

Table 8

show controllers cable-modem des Field Descriptions

 

 

 

Field

 

Description

 

 

 

ds_des_key_table

 

Table showing downstream DES keys.

 

 

ds_des_cbc_iv_table

Table of downstream DES Cipher Block Chaining mode information.

 

 

 

ds_des_sid_table

 

Table showing the SID values to be enabled for DES encryption.

 

 

 

ds_des_sid_enable

 

Controls which SID entries in the SID table are enabled for encryption. In the above

 

 

example, none of the entries are enabled for encryption.

 

 

 

ds_des_ctrl

 

Control register that controls the operating mode of the downstream DES engine.

 

 

 

ds_des_sv

 

DES security version register; the range of the version field in the Baseline Privacy

 

 

Interface (BPI) extended headers that will be accepted by the hardware. High byte is

 

 

upper limit, low byte is lower limit. The Cisco uBR900 will accept versions 0 to 15.

 

 

ds_unencrypted_length

Specifies the number of bytes that will be unencrypted at the beginning of the MAC

 

 

frame. 0x0C means the first 12 bytes are not encrypted, which is what the DOCSIS

 

 

Baseline Privacy specification calls for.

 

 

 

us_des_key_table

 

Table showing upstream DES keys.

 

 

us_des_cbc_iv_table

Table of upstream DES Cipher Block Chaining mode information.

 

 

 

us_des_ctrl

 

Control register that controls the operating mode of the upstream DES engine. The

 

 

value 0x24 means that the upstream is configured to enable decryption and to use CBC

 

 

mode.

 

 

 

Related Commands

Command

Description

 

 

show controllers cable-modem

Displays high-level controller information about a

 

Cisco uBR900 series cable access router.

 

 

show controllers cable-modem bpkm

Displays information about the baseline privacy key

 

management exchange between the Cisco uBR900 series and

 

the CMTS.

 

 

show controllers cable-modem filters

Displays the registers in the MAC hardware that are used for

 

filtering received frames.

 

 

show controllers cable-modem

Displays the mini-slot lookup table inside a Cisco uBR900.

lookup-table

 

 

 

show controllers cable-modem mac

Displays detailed MAC-layer information for a Cisco uBR900.

 

 

show controllers cable-modem phy

Displays the contents of the registers used in the downstream

 

physical hardware of the Cisco uBR900 series.

 

 

show controllers cable-modem tuner

Displays the settings for the upstream and downstream tuners

 

used by a Cisco uBR900 series.

 

 

80Cisco IOS Release 12.0(7)T

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Cisco Systems UBR900 specifications Show controllers cable-modem des Field Descriptions