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show controllers cable-modem
show controllers cable-modem
To display high-level controller information about a Cisco uBR924 cable access router, use the show
controllers cable-modem command in privileged EXEC mode.
show controllers cable-modem number
Syntax Description
number
Defaults
No default behavior or values.
Command Modes
Privileged EXEC
Command History
Release
11.3 NA
Usage Guidelines
The show controllers cable-modem display begins with information from the first few registers of
the Broadcom BCM3300 chip. Next is buffer information for the receive, receive MAC message,
buffer descriptor, and packet descriptor rings. Then comes MIB statistics from the BCM3300 chip,
DMA base registers to indicate where the rings start, global control and status information, and
finally interrupts for the interrupt code.
When using this command, be sure to check the tx_count and the tx_head and tx_tail values for the
buffer descriptor (TX BD) and packet descriptor (TX PD) rings. The tx_count should be greater than
0, and the tx_head and tx_tail values should not be equal. If these values do not change for a long
period of time, it indicates there are packets stuck on the ring. This condition is often caused by the
headend not giving grants.
20
Cisco IOS Release 12.0(5)T
Controller number inside the Cisco uBR924.
Modification
This command was first introduced.
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