3-3
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 3 Configuring QoS Policy Actions and Rules
QoS Policies
8K Policy Maps
The 8K Policy Maps feature enables the router to support a maximum of 8192 unique policy maps for
the PRE3 and PRE4, doubling the number supported in previous releases. The router supports up to 4096
policy maps for the PRE2. To configure 8192 policy maps, the router must be running Cisco IOS
Release 12.2(33)SB. The router supports a maximum of 64 classes per policy map.
Note
The numbers above include both configured and attached policies. Each
policy-map
command counts
as one policy map, which counts against the system limit.
In releases through Cisco IOS Release 12.2(31)SB, the router supports a maximum of 4096 unique
policy maps for the PRE2 and PRE3.
For every additional policy map you create, approximately 2385 + (number of classes x 188) bytes of
memory are used. For example, 8192 policy maps with 64 classes in each uses approximately 118 MB
of memory. This is subtracted from memory that is available for such things as PPP sessions.
If you attempt to create 8193 policy maps, the following error message displays:
No more than 8192 policy maps can be defined.
The number of policy map
instances
supported on the router depends on the number of interfaces
(VCCIs) configured. The maximum number of interfaces allowed is 61,500. Therefore, the theoretical
maximum number of policy instances equals 2 x 61,500.
The router supports 512,000 policer instances and 4095 class maps.
policy-map Command
To create or modify a policy map, use the
policy-map
command in global configuration mode. Use the
no
form of the command to remove a policy map. This command has no default behavior or values.
policy-map
policy-map-name
no
policy-map
policy-map-name
Release 12.2(27)SBB
PRE2
4096
64
Release 12.2(31)SB2
and later releases
PRE3
4096
64
Release 12.2(33)SB and
later releases
PRE3, PRE4
8192
64
PRE2
4096
64
1.
Depending on the complexity of your configuration
2.
Including the class-default class
Table 3-1
System Limits for Policy Maps
Cisco IOS Release
Processor
Policy Maps per System
1
(up to this amount)
No. Classes per
Policy Map
2