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HP 6120XG HP ProCurve Series 6120 Blade Switches Advanced Traffic Management G - Page 207

Assigning an 802.1p Priority to IPv4 Packets on the Basis of the ToS Precedence Bits, qos dscp-map

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Quality of Service (QoS): Managing Bandwidth More Effectively Using QoS Classifiers To Configure Quality of Service for Outbound Traffic codepoint and corresponding 802.1p priority. (Use the qos dscp-map command to specify a priority for any codepoint, see "Differentiated Services Codepoint (DSCP) Mapping" on page 5-51.) • Assign an 802.1p Priority: This option reads the DSCP of an incoming IPv4 packet and, without changing this codepoint, assigns the 802.1p priority to the packet, as configured in the DSCP Policy Table (page 5-51). This means that a priority value of 0 - 7 must be configured for a DSCP before the switch will attempt to perform a QoS match on the packet's DSCP bits. Before configuring the ToS Diffserv mode, you must use the qos dscp-map command to configure the desired 802.1p priorities for the codepoints you want to use for either option. See "Differentiated Services Codepoint (DSCP) Mapping" on page 5-51 for more information. Unless IP-Precedence mode and Diffserv mode are both disabled (the default setting), enabling one automatically disables the other. For more on ToS operation, refer to "Details of QoS IP Type-of-Service" on page 5-36. Assigning an 802.1p Priority to IPv4 Packets on the Basis of the ToS Precedence Bits If a device or application upstream of the switch sets the precedence bits in the ToS byte of IPv4 packets, you can use this feature to apply that setting for prioritizing packets for outbound port queues. If the outbound packets are in a tagged VLAN, this priority is carried as an 802.1p value to the adjacent downstream devices. Syntax: qos type-of-service ip-precedence Causes the switch to automatically assign an 802.1p priority to all IPv4 packets by computing each packet's 802.1p priority from the precedence bits the packet carries. This priority determines the packet's queue in the outbound port to which it is sent. If the packet leaves the switch on a tagged port, it carries the 802.1p priority with it to the next downstream device. (ToS IP Precedence Default: Disabled) no qos type-of-service Disables all ToS classifier operation, including prioritization using the precedence bits. 5-27

Section	Page
HP ProCurve 6120G/XG Switch 6120XG Switch	1
Front Cover	1
Title Page	3
Copyright, Notices, & Publication Data	4
Contents	5
1. Getting Started	19
Contents	19
Introduction	20
Conventions	20
Command Syntax Statements	20
Command Prompts	21
Screen Simulations	21
Configuration and Operation Examples	21
Keys	21
Sources for More Information	22
Getting Documentation From the Web	24
Online Help	24
Menu Interface	24
Command Line Interface	25
Web Browser Interface	25
Need Only a Quick Start?	26
IP Addressing	26
To Set Up and Install the Switch in Your Network	27
Physical Installation	27
2. Static Virtual LANs (VLANs)	29
Contents	29
Overview	31
Introduction	32
General VLAN Operation	32
Types of Static VLANs Available in the Switch	33
Port-Based VLANs	33
Protocol-Based VLANs	33
Designated VLANs	33
Terminology	34
Static VLAN Operation	35
VLAN Environments	36
VLAN Operation	37
Overlapping (Tagged) VLANs	38
Per-Port Static VLAN Configuration Options	40
VLAN Operating Rules	41
General Steps for Using VLANs	44
Multiple VLAN Considerations	45
Single Forwarding Database Operation	45
Example of an Unsupported Configuration and How To Correct It	47
Multiple Forwarding Database Operation	48
Configuring VLANs	49
Menu: Configuring Port-Based VLAN Parameters	49
To Change VLAN Support Settings	50
Adding or Editing VLAN Names	51
Adding or Changing a VLAN Port Assignment	53
CLI: Configuring Port-Based and Protocol-Based VLAN Parameters	55
Web: Viewing and Configuring VLAN Parameters	69
802.1Q VLAN Tagging	70
Special VLAN Types	75
VLAN Support and the Default VLAN	75
The Primary VLAN	75
The Secure Management VLAN	76
Preparation	78
Configuration	79
Using DHCP to Obtain an IP Address	80
Deleting the Management VLAN	83
Operating Notes for Management VLANs	83
Voice VLANs	84
Operating Rules for Voice VLANs	84
Components of Voice VLAN Operation	85
Voice VLAN Access Security	85
Effect of VLANs on Other Switch Features	85
Spanning Tree Operation with VLANs	85
IP Interfaces	86
VLAN MAC Address	86
Port Trunks	86
Port Monitoring	86
Jumbo Packet Support	87
VLAN Restrictions	87
3. GVRP	89
Overview	90
Introduction	91
General Operation	92
Per-Port Options for Handling GVRP “Unknown VLANs”	95
Per-Port Options for Dynamic VLAN Advertising and Joining	97
GVRP and VLAN Access Control	99
Advertisements and Dynamic Joins	99
Port-Leave From a Dynamic VLAN	99
Planning for GVRP Operation	100
Configuring GVRP On a Switch	101
Menu: Viewing and Configuring GVRP	101
CLI: Viewing and Configuring GVRP	102
Web: Viewing and Configuring GVRP	106
GVRP Operating Notes	106
4. Multiple Instance Spanning-Tree Operation	109
Contents	109
Overview	111
802.1s Multiple Spanning Tree Protocol (MSTP)	114
MSTP Structure	115
How MSTP Operates	117
MST Regions	117
Regions, Legacy STP and RSTP Switches, and the Common Spanning Tree (CST)	119
MSTP Operation with 802.1Q VLANs	120
Terminology	121
Operating Rules	123
MSTP Compatibility with RSTP or STP	124
Configuring MSTP	125
Planning an MSTP Application	125
MSTP Configuration Overview	127
Configuring MSTP Operation Mode and Global Settings	129
Configuring MSTP Per-Port Parameters	134
Configuring Per Port Parameters	134
Configuring BPDU Filtering	138
Configuring BPDU Protection	139
Configuring MST Instance Parameters	143
Configuring MST Instance Per-Port Parameters	145
Enabling or Disabling Spanning Tree Operation	148
Enabling an Entire MST Region at Once or Exchanging One Region Configuration for Another	148
MSTP VLAN Configuration Enhancement	150
PreConfiguring VLANs in an MST Instance	151
Configuring MSTP Instances with the VLAN Range Option	152
Operating Notes for the VLAN Configuration Enhancement	154
How to Save Your Current Configuration	155
Displaying MSTP Statistics and Configuration	157
Displaying Global MSTP Status	158
Displaying Detailed Port Information	160
Displaying Status for a Specific MST Instance	161
Displaying the MSTP Configuration	162
Troubleshooting an MSTP Configuration	166
Displaying the Change History of Root Bridges	166
Displaying Debug Counters for All MST Instances	169
Displaying Debug Counters for One MST Instance	170
Displaying Debug Counters for Ports in an MST Instance	172
Field Descriptions in MSTP Debug Command Output	174
Troubleshooting MSTP Operation	177
Loop Protection	178
Configuring Loop Protection	179
Viewing Loop Protection Status	180
5. Quality of Service (QoS): Managing Bandwidth More Effectively	181
Contents	181
Introduction	183
Terminology	186
Overview	187
Classifiers for Prioritizing Outbound Packets	190
Packet Classifiers and Evaluation Order	190
Preparation for Configuring QoS	191
Preserving 802.1p Priority	191
Steps for Configuring QoS on the Switch	191
Using QoS Classifiers To Configure Quality of Service for Outbound Traffic	193
Viewing the QoS Configuration	193
No Override	194
QoS UDP/TCP Priority	195
Assigning an 802.1p Priority Based on TCP or UDP Port Number	196
Operating Notes on Using TCP/UDP Port Ranges	198
Assigning a DSCP Policy Based on TCP or UDP Port Number	199
QoS IP-Device Priority	202
Assigning a Priority Based on IP Address	203
Assigning a DSCP Policy Based on IP Address	204
QoS IP Type-of-Service (ToS) Policy and Priority	206
Assigning an 802.1p Priority to IPv4 Packets on the Basis of the ToS Precedence Bits	207
Assigning an 802.1p Priority to IPv4 Packets on the Basis of Incoming DSCP	208
Assigning a DSCP Policy on the Basis of the DSCP in IPv4 Packets Received from Upstream Devices	213
Details of QoS IP Type-of-Service	216
Assigning a Priority Based on Layer-3 Protocol	218
QoS VLAN-ID (VID) Priority	221
Assigning a Priority Based on VLAN-ID	221
Assigning a DSCP Policy Based on VLAN-ID (VID)	223
QoS Source-Port Priority	226
Assigning a Priority Based on Source-Port	226
Assigning a DSCP Policy Based on the Source-Port	228
Differentiated Services Codepoint (DSCP) Mapping	231
Configuring DSCP Policies for Codepoints	233
Steps for Configuring Codepoints	234
Default Priority Settings for Selected Codepoints	235
Quickly Listing Non-Default Codepoint Settings	236
Note On Changing a Priority Setting	237
Example of Changing the Priority Setting on a Policy When One or More Classifiers Are Currently Using the Policy	238
IP Multicast (IGMP) Interaction with QoS	241
QoS Messages in the CLI	242
QoS Queue Configuration	243
Configuring Traffic Templates	245
Overview	245
Displaying Traffic Template Information	245
Creating a Traffic Template	246
Configuring Traffic Groups Within a Traffic Template	248
Moving a Priority From One Traffic Group to Another	248
Applying a Traffic Template	250
Changing the Number of QoS Queues	251
Displaying the QoS Queue Configuration	251
QoS Operating Notes and Restrictions	252
6. Converged Enhanced Ethernet on the HP ProCurve 6120XG Switch	255
Contents	255
Introduction	257
Terminology	258
CEE Network Example	259
Getting Started	261
Installing and Verifying the CEE License	261
Configuring Traffic Templates	262
Applying the Traffic Template	263
Data Center Bridging Exchange	265
Enabling DCBX	266
Displaying DCBX Status Information	267
DCBX Log Messages	269
Minor Errors	269
Serious Errors	270
Configuring Priority Flow Control (PFC)	271
Operating Notes for PFC	271
Configuring PFC	271
Notes on the Behavior of Priority Flow Control	272
Displaying the Status of Flow Control	272
Troubleshooting	274
DCBX Troubleshooting	274
FIP Snooping	275
Getting Started	277
1. Configure CEE on the switch.	277
2. Configure the FC-MAP	277
3. Enable/disable FIP Snooping	279
Troubleshooting	281
FIP Snooping Implications on Trunk Configuration	282
Numerics	283
A	283
B	283
C	283
D	283
E	284
F	284
G	284
H	284
I	285
J	285
L	285
M	285
N	285
O	285
P	285
Q	286
R	286
S	286
T	288
U	289
V	289
W	290
W	290

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5-27

Quality of Service (QoS): Managing Bandwidth More Effectively

Using QoS Classifiers To Configure Quality of Service for Outbound Traffic

codepoint and corresponding 802.1p priority. (Use the

qos dscp-map

command to specify a priority for any codepoint, see “Differentiated

Services Codepoint (DSCP) Mapping” on page 5-51.)

•

Assign an 802.1p Priority:

This option reads the DSCP of an

incoming IPv4 packet and, without changing this codepoint, assigns

the 802.1p priority to the packet, as configured in the DSCP Policy

Table (page 5-51). This means that a priority value of 0 - 7 must be

configured for a DSCP before the switch will attempt to perform a

QoS match on the packet’s DSCP bits.

Before configuring the ToS Diffserv mode, you must use the

qos

dscp-map

command to configure the desired 802.1p priorities for the codepoints you

want to use for either option. See “Differentiated Services Codepoint

(DSCP) Mapping” on page 5-51 for more information.

Unless IP-Precedence mode and Diffserv mode are both disabled (the default

setting), enabling one automatically disables the other. For more on ToS

operation, refer to “Details of QoS IP Type-of-Service” on page 5-36.

Assigning an 802.1p Priority to IPv4 Packets on the Basis

of the ToS Precedence Bits

If a device or application upstream of the switch sets the precedence bits in

the ToS byte of IPv4 packets, you can use this feature to apply that setting for

prioritizing packets for outbound port queues. If the outbound packets are in

a tagged VLAN, this priority is carried as an 802.1p value to the adjacent

downstream devices.

Syntax:

qos type-of-service ip-precedence

Causes the switch to automatically assign an 802.1p prior-

ity to all IPv4 packets by computing each packet’s 802.1p

priority from the precedence bits the packet carries. This

priority determines the packet’s queue in the outbound port

to which it is sent. If the packet leaves the switch on a tagged

port, it carries the 802.1p priority with it to the next

downstream device. (ToS IP Precedence Default: Disabled)

no qos type-of-service

Disables all ToS classifier operation, including prioritiza-

tion using the precedence bits.