Cisco Cisco IOS Software Release 12.2(1c) Manual Técnico
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Note: Inbound Network-Based Application Recognition (NBAR) happens after ACLs and before
policy-based routing.
policy-based routing.
Important changes have been implemented regarding feature ordering and remarked value usage. These
changes include moving input CAR, input MAC, and IP precedence accounting functions to occur
before MQC output classification:
changes include moving input CAR, input MAC, and IP precedence accounting functions to occur
before MQC output classification:
Input rate-limiting, or CAR, applies to packets following the process switching path and destined
to the router. Previously, only packets switched through the router using CEF could be rate-
limited.
to the router. Previously, only packets switched through the router using CEF could be rate-
limited.
New IP precedence values set by input CAR or QPPB can be used for selecting a Virtual Circuit
(VC) in an ATM VC bundle.
(VC) in an ATM VC bundle.
IP precedence, Differentiated Services Code Points (DSCP), and QoS group values set by input
CAR or QPPB can be used for MQC output packet classification.
CAR or QPPB can be used for MQC output packet classification.
Marking and Other QoS Actions on the Same Router
A frequent application of QoS is to remark a packet and then apply an action which considers the
remarked value on the same interface or on the same router. You can configure both marking and other
QoS actions with common classification.
remarked value on the same interface or on the same router. You can configure both marking and other
QoS actions with common classification.
You can remark packets with these QoS features:
set command with class-based marking
police command with class-based policing
CAR
3. Input ACLs
4. Input marking
(class-based
marking or
Committed Access
Rate (CAR))
marking or
Committed Access
Rate (CAR))
5. Input policing
(through a class-
based policer or
CAR)
based policer or
CAR)
6. IP Security (IPSec)
7. Cisco Express
Forwarding (CEF)
or Fast Switching
or Fast Switching
3. Output ACLs
4. Output marking
5. Output policing (through a
class-based policer or
CAR)
CAR)
6. Queueing (Class-Based
Weighted Fair Queueing
(CBWFQ) and Low
Latency Queueing (LLQ)),
and Weighted Random
Early Detection (WRED)
(CBWFQ) and Low
Latency Queueing (LLQ)),
and Weighted Random
Early Detection (WRED)
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Cisco - Quality of Service Order of Operation
4/11/2005
http://kbase/paws/servlet/ViewFile/22141/qos_orderofop_3.xml?convertPaths=1