Table 407: Default Packet Header Rewrite Mappings
(continued)
Map to DSCP/IEEE 802.1p/IP Precedence
Value
PLP Value
Map from Forwarding Class
be
high
best-effort
nc1/cs6
low
network-control
nc2/cs7
high
network-control
Related
Documentation
Understanding Junos OS CoS Components for EX Series Switches on page 3148
•
•
Example: Configuring CoS on EX Series Switches on page 3173
•
Defining CoS Rewrite Rules (CLI Procedure) on page 3216
•
Defining CoS Rewrite Rules (J-Web Procedure) on page 3217
Understanding Port Shaping and Queue Shaping for CoS on EX Series Switches
If the amount of traffic on a switch's network interface is more than the maximum
bandwidth allowed on the interface, it leads to congestion. Port shaping and queue
shaping can be used to manage the excess traffic and avoid congestion. Port shaping
defines the maximum bandwidth allocated to a port, while queue shaping defines a limit
on excess-bandwidth usage per queue.
This topic covers:
•
Port Shaping on page 3165
•
Queue Shaping on page 3165
Port Shaping
Port shaping enables you to shape the aggregate traffic through a port or channel to a
rate that is less than the line or port rate.
Queue Shaping
Queue shaping throttles the rate at which queues transmit packets. For example, using
queue shaping, you can rate-limit a strict-priority queue so that the strict-priority queue
does not lock out (or starve) low-priority queues. Similarly, for any queue, you can
configure queue shaping.
Related
Documentation
Understanding CoS Schedulers on page 3160
•
•
Defining CoS Schedulers (CLI Procedure) on page 3209
3165
Copyright © 2010, Juniper Networks, Inc.
Chapter 107: Class of Service (CoS)—Overview
Summary of Contents for JUNOS OS 10.3 - SOFTWARE
Page 325: ...CHAPTER 17 Operational Mode Commands for System Setup 229 Copyright 2010 Juniper Networks Inc ...
Page 1323: ...CHAPTER 56 Operational Mode Commands for Interfaces 1227 Copyright 2010 Juniper Networks Inc ...
Page 2841: ...CHAPTER 86 Operational Commands for 802 1X 2745 Copyright 2010 Juniper Networks Inc ...
Page 3367: ...CHAPTER 113 Operational Mode Commands for CoS 3271 Copyright 2010 Juniper Networks Inc ...
Page 3435: ...CHAPTER 120 Operational Mode Commands for PoE 3339 Copyright 2010 Juniper Networks Inc ...
Page 3529: ...CHAPTER 126 Operational Mode Commands for MPLS 3433 Copyright 2010 Juniper Networks Inc ...