Configuring Headend Broadband Access Router Features
QoS Features
Multiple SIDs provide the following functionality:
•Voice traffic can be designated on a higher QoS committed information rate (CIR) secondary SID, while data traffic can be forwarded on a
•Secondary SIDs are higher QoS
The CMTS treats the primary and secondary SIDs independently for issuing grants. Each SID of a cable modem has an independent state machine. Channel access for each SID is independent of the other SID.
Note Reliable operation with voice requires multiple
QoS Profile Enforcement
QoS profile enforcement allows you to override the provisioned service class of a cable modem with a static
When this feature is enabled, the CMTS provisions each registering cable modem with a default DOCSIS
1.0service class that is assigned by the CMTS operator. The
When the cable modem sends data upstream, it makes bandwidth requests without throttling or dropping packets because of its own
Note By default, the system will not enforce a specific QoS profile on the cable modem. The QoS profile assigned to the cable modem will depend on the class of service parameters provisioned in the DOCSIS configuration file.
TAG/NetFlow Switching
TAG switching and Netflow switching provide high performance for network layer services, enabling
•Source and destination IP address
•Start of flow and end of flow timestamps
•Packet and byte counts
•Next hop router address
•Input and output physical port interfaces
Cisco IOS Multiservice Applications Configuration Guide