Chapter 11: Quality of Service
Creating QoS Policies
– 243 –
3.
Select Show Rule from the Action list.
Figure 11-4: Showing the Rules for a Class Map
C
REATING
Q
O
S P
OLICIES
Use the Traffic > DiffServ (Configure Policy) page to create a policy map
that can be attached to multiple interfaces. A policy map is used to group
one or more class map statements (
), modify service tagging, and
enforce bandwidth policing. A policy map can then be bound by a service
policy to one or more interfaces (
).
Configuring QoS policies requires several steps. A class map must first be
configured which indicates how to match the inbound packets according to
an access list, a DSCP or IP Precedence value, or a member of specific
VLAN. A policy map is then configured which indicates the boundary
parameters used for monitoring inbound traffic, and the action to take for
conforming and non-conforming traffic. A policy map may contain one or
more classes based on previously defined class maps.
The class of service or per-hop behavior (i.e., the priority used for internal
queue processing) can be assigned to matching packets. In addition, the
flow rate of inbound traffic can be monitored and the response to
conforming and non-conforming traffic based by one of three distinct
policing methods as described below.
Police Flow Meter
– Defines the committed information rate (maximum
throughput), committed burst size (burst rate), and the action to take for
conforming and non-conforming traffic.
Policing is based on a token bucket, where bucket depth (that is, the
maximum burst before the bucket overflows) is specified by the “burst”
field (BC), and the average rate tokens are removed from the bucket is
specified by the “rate” option (CIR). Action may be taken for traffic
conforming to the maximum throughput, or exceeding the maximum
throughput.
srTCM Police Meter
– Defines an enforcer for classified traffic based on a
single rate three color meter scheme defined in RFC 2697. This metering
policy monitors a traffic stream and processes its packets according to the
committed information rate (CIR, or maximum throughput), committed
Содержание SSE-G2252
Страница 42: ...44 General IP Routing on page 627...
Страница 174: ...Chapter 6 VLAN Configuration Configuring VLAN Mirroring 178 Figure 6 27 Showing the VLANs to Mirror...
Страница 511: ...Chapter 14 Basic Administration Protocols UDLD Configuration 518 Figure 14 100 Displaying UDLD Neighbor Information...
Страница 603: ...Chapter 16 IP Configuration Setting the Switch s IP Address IP Version 6 609...
Страница 883: ...Chapter 24 General Security Measures Port based Traffic Segmentation 894...
Страница 989: ...Chapter 30 Congestion Control Commands Automatic Traffic Control Commands 1000 Console...
Страница 1007: ...Chapter 33 Address Table Commands 1019...
Страница 1137: ...Chapter 38 Quality of Service Commands 1150...
Страница 1366: ...Chapter 46 IP Routing Commands Global Routing Configuration 1381 Connected 2 Total 2 FIB 0 Console...