Frf.12 Fragmentation Inheritance; Frf.12 Fragmentation And Hierarchical Policies - Cisco 10000 Series Configuration Manual

Chapter 16 Fragmenting and Interleaving Real-Time and Nonreal-Time Packets

FRF.12 Fragmentation Inheritance

Table 16-4
interface, subinterface, or DLCI (either directly or using a map class with LFI enabled).
PVC-Based Frame Relay LFI Inheritance
LFI Enabled
Interface
Subinterface
DLCI

FRF.12 Fragmentation and Hierarchical Policies

To configure FRF.12 Fragmentation, you must first configure a hierarchical service policy and attach it
to a Frame Relay interface, subinterface, or data-link connection identifier (DLCI) in one of the
following ways:
•
•
Fragmentation is enabled only when a hierarchical service policy is attached. The hierarchical service
policy you define must identify and allocate queues for real-time (priority) traffic and nonreal-time
traffic.
Example 16-8
nonreal-time traffic. You can create the T1 interface under any higher level channelized interface that
supports T1 tributaries or the T1/E1 line card interface. In the example, the child policy map named
policy_12_p0 defines QoS actions for three traffic classes: prec_q0 for priority traffic, prec_q1 for
non-priority traffic, and prec_q2 for non-priority traffic. The parent policy map named policy_13 shapes
traffic for all of the traffic classes to 256 kbps. The service-policy command is used to apply the child
policy to the parent policy. When applying the service policy to an interface, subinterface, or DLCI, use
the service-policy command and specify the output keyword for FRF.12 Fragmentation.
Example 16-8 Defining a Hierarchical Service Policy
Router(config)# t1 1 channel-group 1 timeslot 1-24 speed 56
!
Router(config)# class-map match-all prec_q2
Router(config-cmap)# match ip precedence 2
Router(config-cmap)# class-map match-all prec_q0
Router(config-cmap)# match ip precedence 0
Router(config-cmap)# class-map match-all prec_q1
Router(config-cmap)# match ip precedence 1
!
Router(config)# policy-map policy_12_p0
Router(config-pmap)# class prec_q0
Router(config-pmap-c)# priority
Router(config-pmap-c)# police 64000
Router(config-pmap-c)# class prec_q1
Router(config-pmap-c)# bandwidth percent 39
Router(config-pmap-c)# class prec_q2
Router(config-pmap-c)# bandwidth percent 4
!
Router(config)# policy-map policy_13
OL-7433-09
describes FRF.12 Fragmentation inheritance when you configure LFI on a Frame Relay
Directly using the service-policy command
Using a Frame Relay map class
creates a serial T1 interface and defines a service policy for both real-time and
Traffic Subject to LFI
All PVCs on the interface and its subinterfaces
All PVCs on the subinterface
DLCI only
Cisco 10000 Series Router Quality of Service Configuration Guide
FRF.12 Fragmentation
16-39