Cisco Systems UBR900 User Manual
show controllers cable-modem
Configuring the Cisco uBR900 Series Cable Access Routers 71
show controllers cable-modem
To display high-level controller information about a Cisco uBR900 series cable access router, use
the show controllers cable-modem command in privileged EXEC mode.
the show controllers cable-modem command in privileged EXEC mode.
show controllers cable-modem number
Syntax Description
Defaults
No default behavior or values.
Command Modes
Privileged EXEC
Command History
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.
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.
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.
number
Controller number inside the Cisco uBR900 series.
Release
Modification
11.3 NA
This command was introduced.