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Example: Configuring Drop Profile Maps
A drop-profile map associates weighted random early detection (WRED) profiles for traffic of specified packet loss priorities with a scheduler. When you use a scheduler map to map a scheduler to a forwarding class, the drop profile map associated with the scheduler applies the specified WRED drop profile to traffic in the forwarding class that matches the specified packet loss priority.
Configuring a Drop Profile Map
CLI Quick Configuration
To quickly configure a drop profile map, copy the following commands, paste them in a text file, remove line breaks, change variables and details to match your network configuration, and then copy and paste the commands into the CLI at the [edit] hierarchy level.
[edit class-of-service] set schedulers mylan drop-profile-map loss-priority low protocol any drop-profile lp-profile set schedulers mylan drop-profile-map loss-priority medium-high protocol any drop-profile mh-profile set schedulers mylan drop-profile-map loss-priority high protocol any drop-profile h-profile
Step-by-Step Procedure
To configure a drop profile map:
Configure the drop profile for low-priority traffic:
[edit class-of-service] user@switch# set schedulers mylan drop-profile-map loss-priority low protocol any drop-profile lp-profile
Configure the drop profile for medium-high priority traffic:
[edit class-of-service] user@switch# set schedulers mylan drop-profile-map loss-priority medium-high protocol any drop-profile mh-profile
Configure the drop profile for high-priority traffic:
[edit class-of-service] user@switch# set schedulers mylan drop-profile-map loss-priority high protocol any drop-profile h-profile
Requirements
This example uses the following hardware and software components:
A Juniper Networks QFX3500 Switch
Junos OS Release 11.1 or later for the QFX Series or Junos OS Release 14.1X53-D20 or later for the OCX Series.
Overview
Drop profile maps enable you to configure different drop profiles for traffic of different packet loss priorities within the same scheduler. You can associate different drop profiles with low-priority, medium-high priority, and high-priority traffic within a single scheduler, and then map that scheduler to a forwarding class. This applies the appropriate drop profile to traffic of each loss priority in a forwarding class. Drop profile maps apply to all traffic protocols.
The following example describes how to configure a drop profile
map for a scheduler named mylan that includes:
A drop profile called
lp-profilefor low-priority trafficA drop profile called
mh-profilefor medium-high priority trafficA drop profile called
h-profilefor high-priority traffic
You apply the drop profiles in the drop profile map to a forwarding
class by associating the scheduler mylan with a forwarding
class in a scheduler map.
Verification
Verifying the Drop Profile Map Configuration
Purpose
Verify that you configured the drop profile map for
the scheduler mylan with the correct loss priorities and
drop profiles.
Action
Verify the results of the drop profile map configuration
using the operational mode command show configuration class-of-service
schedulers mylan:
user@switch> show configuration class-of-service schedulers mylan transmit-rate 3g; shaping-rate percent 100; priority low; drop-profile-map loss-priority low protocol any drop-profile lp-profile; drop-profile-map loss-priority medium-high protocol any drop-profile mh-profile; drop-profile-map loss-priority high protocol any drop-profile h-profile;
This example does not include configuring scheduler bandwidth and priority. This information (transmit rate, shaping rate, and priority) is shown for completeness.