Configuring Maximum Bonus Bandwidth - Cisco cBR 8 Configuration Manual

Fairness Across DOCSIS Interfaces
Step 3
Step 4

Configuring Maximum Bonus Bandwidth

This section describes how to configure the maximum usable bonus bandwidth for a BG.
Bonus bandwidth is the additional bandwidth provided by the Fairness Across DOCSIS Interfaces feature to
each BG for CIR reservation. In the default maximum bonus bandwidth configuration, a single BG can reserve
all the underlying RF bandwidth. When the maximum bonus is set, the AC module will not admit CIR flows
above that setting even if the scheduler has guaranteed more bandwidth. This will effectively prevent BGs
from being starved for CIR flows.
The cable acfe max-bonus-bandwidth command configuration is applicable only for the new incoming
Note
CIR flows. It will not terminate the existing CIR flows that exceeds the max-bonus-bandwidth .
Restriction
Procedure
Step 1
Step 2
Command or Action
cable acfe constant-eir-demand value
Example:
Router(config)# cable acfe
constant-eir-demand 20
exit
Example:
Router(config)# exit
If the maximum bonus bandwidth is less than the current CIR reservation on an interface, no new CIR
flows are admitted until the CIR reservation drops below the maximum bonus bandwidth configuration.
Command or Action
enable
Example:
Router> enable
configure terminal
Example:
Router# configure terminal
Cisco cBR Series Converged Broadband Routers Quality of Services Configuration Guide for Cisco IOS XE Fuji
Configuring Maximum Bonus Bandwidth
Purpose
Configures the constant EIR demand as 20 for
a BG.
Exits global configuration mode and returns to
privileged EXEC mode.
Purpose
Enables privileged EXEC mode.
• Enter your password if prompted.
Enters global configuration mode.
16.7.x
95