Cisco WS-C6506 - Disabling DNS

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30-4

Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7

OL-8978-04

Chapter 30 Configuring DNS

Configuring DNS on the Switch

Disabling DNS

To disable DNS, perform this task in privileged mode:

This example shows how to disable DNS on the switch:

Console> (enable) set ip dns disable

DNS is disabled

Console> (enable)

Task Command

Step 1

Disable DNS on the switch. set ip dns disable

Step 2

Verify the DNS configuration. show ip dns [noalias]

Main Page

Default Chapter3
- Table of Contents3
Chapter 1 Product Overview39
Chapter 2 Command-Line Interface39
- C H a P T E R 3 Configuring the Switch IP Address and Default Gateway39
- C H a P T E R 5 Configuring Ethernet VLAN Trunks39
- Catalyst 6500 Series Switch Software Configuration Guide—Release39
Chapter 10 Configuring VTP40
Chapter 11 Configuring VLAN40
- C H a P T E R 12 Configuring Intervlan Routing40
Chapter 13 Configuring CEF for PFC2 and PFC3A40
Chapter 15 Configuring Acces Control40
Chapter 32 Configuring UDLD41
- Related Documentation42
- Obtaining Documentation and Submitting a Service Request43
Appendix A Acronym41
Product Overview45
- Catalyst Command-Line Interface47
  - ROM-Monitor Command-Line Interface47
  - Switch Command-Line Interface48
- MSFC Command-Line Interface54
  - Cisco IOS Command Modes54
  - Cisco IOS Command-Line Interface56
CHAPTER 3 Configuring the Switch IP Address and Default Gateway59
- Understanding How the Switch Management Interfaces Work59
- Understanding How Automatic IP Configuration Works60
- Preparing to Configure the IP Address and Default Gateway62
- Booting the MSFC for the First Time62
- Booting from a Melody Compact Flash Adapter Card63
- Default IP Address and Default Gateway Configuration64
- Features Supported by the Sc0 and Sc1 In-Band Interfaces64
- Assigning the In-Band (Sc0 and Sc1) Interface IP Address65
- Configuring the Default Gateways66
- Configuring the SLIP (Sl0) Interface on the Console Port67
- Using BOOTP, DHCP, or RARP to Obtain an IP Address68
- Renewing and Releasing a DHCP-Assigned IP Address69
Chapter 4 Configuring Ethernet, Fast Ethernet, Gigabit Ethernet, and 10-Gigabit Ethernet Switching71
- Understanding How Ethernet Works71
- Default Ethernet, Fast Ethernet, Gigabit Ethernet, and 10-Gigabit Ethernet Configuration73
- Setting the Port Configuration74
CHAPTER 5 Configuring Ethernet VLAN Trunks5-193
- Understanding How VLAN Trunks Work93
- Default Trunk Configuration97
- Configuring a Trunk Link97
Configuring Etherchannel121
- Understanding How Etherchannel Works122
- Understanding How Etherchannel Frame Distribution Works122
- Port Aggregation Control Protocol and Link Aggregation Control Protocol123
- Etherchannel Configuration Guidelines123
- Understanding How the Port Aggregation Protocol Works125
- Configuring an Etherchannel Using Pagp127
- Understanding How the Link Aggregation Control Protocol Works133
  - LACP Modes133
  - LACP Parameters133
- Configuring an Etherchannel Using LACP135
- Clearing and Restoring the Etherchannel Counters140
  - Clearing the Etherchannel Counters140
  - Restoring the Etherchannel Counters141
Configuring Spanning Tree143
- Understanding How Spanning Tree Protocols Work144
  - Understanding How a Topology Is Created145
  - Understanding How a Switch Becomes the Root Switch145
  - Understanding How Bridge Protocol Data Units Work146
  - Calculating and Assigning Port Costs146
  - Spanning-Tree Port States148
- Understanding How PVST+ and MISTP Modes Work154
  - PVST+ Mode155
  - Rapid-PVST155
  - MISTP Mode155
  - MISTP-PVST+ Mode156
- Understanding How Bridge Identifiers Work156
  - MAC Address Allocation156
  - MAC Address Reduction157
- Understanding How Multiple Spanning Tree Works158
  - Rapid Spanning Tree Protocol160
  - MST-To-SST Interoperability161
  - Common Spanning Tree163
  - MST Instances163
  - MST Configuration163
  - MST Region164
  - Message Age and Hop Count165
  - MST-To-PVST+ Interoperability166
- Understanding How BPDU Skewing Works166
- Understanding How Layer 2 PDU Rate Limiting Works167
- Configuring PVST+ on the Switch168
- Default PVST+ Configuration168
- Setting the PVST+ Bridge ID Priority169
- Configuring the PVST+ Port Cost170
- Configuring the PVST+ Port Priority171
- Configuring the PVST+ Default Port Cost Mode171
- Configuring the PVST+ Port Cost for a VLAN173
- Configuring the PVST+ Port Priority for a VLAN173
- Disabling the PVST+ Mode on a VLAN174
- Configuring Rapid-PVST+ on the Switch175
- Configuring MISTP-PVST+ or MISTP on the Switch176
  - Default MISTP and MISTP-PVST+ Configuration177
  - Setting the MISTP-PVST+ Mode or the MISTP Mode177
  - Configuring an MISTP Instance179
  - Enabling an MISTP Instance183
  - Mapping Vlans to an MISTP Instance183
  - Disabling MISTP-PVST+ or MISTP186
- Configuring a Root Switch186
  - Configuring a Primary Root Switch187
  - Configuring a Secondary Root Switch188
  - Configuring a Root Switch to Improve Convergence188
  - Using Root Guard-Preventing Switches from Becoming Root190
  - Displaying Spanning-Tree BPDU Statistics190
- Configuring Spanning-Tree Timers on the Switch191
  - Configuring the Hello Time192
  - Configuring the Forward Delay Time192
  - Configuring the Maximum Aging Time193
- Configuring Multiple Spanning Tree on the Switch193
  - Enabling Multiple Spanning Tree193
  - Mapping and Unmapping Vlans to an MST Instance200
- Configuring BPDU Skewing on the Switch201
- Configuring Layer 2 PDU Rate Limiting on the Switch203
CHAPTER 8 Configuring IEEE 802.1Q Tunneling and Layer 2 Protocol Tunneling207
- Understanding How 802.1Q Tunneling Works207
- 802.1Q Tunneling Configuration Guidelines208
- Configuring 802.1Q Tunneling on the Switch210
- Understanding How Layer 2 Protocol Tunneling Works212
- Layer 2 Protocol Tunneling Configuration Guidelines213
- Configuring Layer 2 Protocol Tunneling on the Switch213
CHAPTER 9 Configuring Spanning-Tree Portfast, Uplinkfast, Backbonefast, and Loop Guard222
- Understanding How Portfast Works222
- Understanding How Portfast BPDU Guard Works222
- Understanding How Portfast BPDU Filtering Works223
- Understanding How Uplinkfast Works223
- Understanding How Backbonefast Works224
- Understanding How Loop Guard Works226
- Configuring Portfast on the Switch228
- Configuring Portfast BPDU Guard on the Switch231
  - Enabling Portfast BPDU Guard231
  - Disabling Portfast BPDU Guard232
- Configuring Portfast BPDU Filtering on the Switch233
  - Enabling Portfast BPDU Filtering234
  - Disabling Portfast BPDU Filtering235
- Configuring Uplinkfast on the Switch235
  - Enabling Uplinkfast236
  - Disabling Uplinkfast237
- Configuring Backbonefast on the Switch238
- Configuring Loop Guard on the Switch239
  - Enabling Loop Guard239
    - Disabling Loop Guard240
Configuring VTP242
- Understanding How VTP Version 1 and Version 2 Work242
- Default VTP Version 1 and Version 2 Configuration245
- VTP Version 1 and Version 2 Configuration Guidelines245
- Configuring VTP Version 1 and Version 2246
- Understanding How VTP Version 3 Works252
- Default VTP Version 3 Configuration261
- Configuring VTP Version 3262
Configuring Vlans271
- Understanding How Vlans Work271
  - VLAN Ranges272
- Configurable VLAN Parameters273
- Default VLAN Configuration273
- Configuring Vlans on the Switch274
- Configuring Extended-Range Vlans on the Switch276
  - Extended-Range VLAN Configuration Guidelines276
  - Creating Extended-Range Vlans277
- Mapping Vlans to Vlans278
  - Mapping 802.1Q Vlans to ISL Vlans279
  - Deleting 802.1Q-To-ISL VLAN Mappings280
- Allocating Internal Vlans280
- Assigning Switch Ports to a VLAN280
- Enabling or Disabling VLAN Port-Provisioning Verification282
- Deleting a VLAN283
- Configuring VLAN Mappings on a Per-Port or Per-ASIC Basis284
- Configuring Private Vlans on the Switch289
- Configuring FDDI Vlans on the Switch300
- Configuring Token Ring Vlans on the Switch301
Configuring Intervlan Routing309
- Understanding How Intervlan Routing Works309
- Configuring Intervlan Routing on the MSFC310
Configuring CEF for PFC2 and PFC3A319
- Understanding How Layer 3 Switching Works320
- Default CEF for PFC2/PFC3A Configuration330
- CEF for PFC2/PFC3A Configuration Guidelines and Restrictions331
- Configuring CEF for PFC2/PFC3A on the Switch332
- Configuring the Netflow Statistics on the Switch345
- Configuring the MLS IP-Directed Broadcasts on the Switch354
Chapter 14 Configuring MLS357
- Understanding How Layer 3 Switching Works357
  - Understanding Layer 3-Switched Packet Rewrite358
  - Understanding MLS360
- Default MLS Configuration368
- Configuration Guidelines and Restrictions369
- Ip Mls369
  - Configuration Guidelines and Restrictions370
- Ip Mmls370
- Ipx Mls371
  - Configuring MLS372
Chapter 15 Configuring Access Control397
- Hardware Requirements398
- Understanding How Acls Work398
- Supported Acls399
  - Qos Acls399
  - Cisco IOS Acls399
- Vacls400
Chapter 16 Configuring NDE521
- Understanding How NDE Works521
- Default NDE Configuration526
- Configuring NDE on the Switch527
Chapter 17 Configuring GVRP539
- Understanding How GVRP Works539
- Default GVRP Configuration540
- GVRP Configuration Guidelines540
- Configuring GVRP on the Switch540
Configuring MVRP549
- Understanding How MVRP Works549
- Default MVRP Configuration550
- MVRP Configuration Guidelines550
- Configuring MVRP on the Switch551
Configuring Dynamic Port VLAN Membership with VMPS561
- Understanding How VMPS Works561
- Default VMPS and Dynamic Port Configuration562
- Dynamic Port VLAN Membership and VMPS Configuration Guidelines563
- Configuring VMPS and Dynamic Port VLAN Membership on the Switch563
  - Creating the VMPS Database564
- Configuring VMPS565
- Configuring Dynamic Ports on VMPS Clients565
- Administering and Monitoring VMPS566
- Configuring Static VLAN Port Membership567
- Backing up the VMPS Configuration File568
- Troubleshooting VMPS and Dynamic Port VLAN Membership569
  - Troubleshooting VMPS569
  - Troubleshooting Dynamic Port VLAN Membership570
- Dynamic Port VLAN Membership with VMPS Configuration Examples570
  - VMPS Database Configuration File Example570
  - Dynamic Port VLAN Membership Configuration Example572
- Dynamic Port VLAN Membership with Auxiliary Vlans574
  - Dynamic Port VLAN Membership with Auxiliary Vlans Guidelines574
  - Configuring Dynamic Port VLAN Membership with Auxiliary Vlans575
Chapter 20 Checking Status and Connectivity577
- Checking the Module Status578
- Checking the Port Status579
- Displaying the Port MAC Address580
- Displaying the Duplicate MAC Entries in the CAM Table581
- Displaying Port Capabilities582
- Configuring the MAC Utilization Load Interval582
  - Understanding How the MAC Utilization Load Interval Works583
  - Setting the MAC Utilization Load Interval583
  - Displaying MAC Utilization Statistics583
  - Clearing MAC Utilization Counters585
- Checking the 10-Gigabit Ethernet Link Status586
- Checking the Cable Status Using TDR587
- Using Telnet588
- Using Secure Shell Encryption for Telnet Sessions588
- Monitoring User Sessions590
- Using Ping591
  - Understanding How Ping Works591
  - Executing Ping592
- Using Layer 2 Traceroute593
  - Layer 2 Traceroute Usage Guidelines593
  - Identifying a Layer 2 Path594
- Using IP Traceroute594
  - Understanding How IP Traceroute Works594
  - Executing IP Traceroute595
- Using System Warnings on Port Counters595
  - Executing System Warnings on Port Counters596
  - Executing Hardware Level Warnings on Port Counters599
  - Executing Spanning-Tree Warnings on Port Counters599
- Configuring Packet-Buffer Error Handling600
- Configuring Etherchannel/Link Error Handling600
- Configuring IEEE 802.3Ah Ethernet OAM602
  - Understanding How OAM Works602
  - Ethernet OAM Configuration Guidelines and Restrictions603
  - Executing Ethernet OAM603
- Configuring Metro Ethernet Connectivity Fault Management614
  - Understanding How Metro Ethernet Connectivity Fault Management Works615
  - Connectivity Fault Management Protocols615
  - Maintenance Domains615
  - Maintenance Associations616
  - Maintenance Points616
  - CFM Configuration Guidelines and Restrictions618
  - Configuring Metro Ethernet CFM620
- Configuring the Alarm Indication Signal630
  - Understanding How CFM Works with 802.3Ah Link-OAM for AIS-RDI631
  - Ethernet Alarm Indication Signal631
  - Ethernet Remote Defect Indication632
  - ASI and RDI Configuration Guidelines and Restrictions632
  - Configuring an Alarm Indication Signal633
- Configuring the Ethernet Local Management Interface636
  - Understanding How ELMI Works636
  - Ethernet Local Management Protocols636
  - Configuring ELMI637
  - Configuring ELMI on the Switch638
- Configuring MAC Address Move Counters645
  - Understanding How MAC Address Move Counters Work645
  - MAC Address Move Counter Configuration Guidelines and Restrictions646
  - MAC Address Move Counter Syslog Generation646
  - Executing MAC Address Move Counters647
  - Enabling or Disabling MAC Address Move Counters647
- Digital Optical Monitoring649
  - Displaying Transceiver Information649
  - Setting Transceiver Monitoring and Thresholds653
Chapter 21 Configuring GOLD655
- Understanding How Online Diagnostics Work655
- Configuring Online Diagnostics656
Chapter 22 Administering the Switch667
- Setting the System Name and System Prompt on the Switch668
  - Setting the Static System Name and Prompt668
- Setting the System Contact and Location on the Switch669
- Setting the System Clock on the Switch670
- Creating a Login Banner on the Switch670
  - Configuring a Login Banner671
  - Clearing a Login Banner671
Displaying or Suppressing the "Cisco Systems Console" Telnet Login Banner on the Switch671
- Defining Command Aliases on the Switch672
- Defining IP Aliases on the Switch673
- Configuring Static Routes on the Switch674
- Configuring Permanent and Static ARP Entries on the Switch675
- Scheduling a System Reset on the Switch676
  - Scheduling a Reset at a Specific Time676
  - Scheduling a Reset Within a Specified Amount of Time677
- Power Management678
  - Enabling or Disabling Power Redundancy678
  - Using the CLI to Power Modules up or down680
- Environmental Monitoring680
  - Environmental Monitoring Using CLI Commands681
  - LED Indications681
- Displaying System Status Information for Technical Support682
Configuring Redundancy693
- Understanding How Supervisor Engine Redundancy Works694
- Configuring Redundant Supervisor Engines on the Switch696
- MSFC Redundancy713
Configuring NSF with SSO MSFC Redundancy747
- Hardware and Software Requirements748
- Understanding How NSF/SSO Works748
- RPR Overview749
- Types of MSFC Switchovers750
- Configuration Guidelines and Restrictions750
- Using the CLI to Configure NSF/SSO751
  - Configuring SSO752
  - Configuring CEF NSF753
- Verifying CEF NSF753
- Configuring BGP NSF754
- Verifying BGP NSF754
- Configuring OSPF NSF755
- Verifying OSPF NSF756
- Configuring IS-IS NSF756
- Verifying IS-IS NSF757
- Displaying Redundancy-Related Information759
- Performing an MSFC Switchover759
- Performing an MSFC Software Reload759
- Using Redundancy-Related Debug Commands759
- Upgrading Software760
Chapter 25 Modifying the Switch Boot Configuration763
- Understanding How the Switch Boot Configuration Works763
- Default Switch Boot Configuration767
- Setting the Configuration Register767
- Setting the BOOT Environment Variable772
  - Clearing the BOOT Environment Variable Settings773
- Setting the CONFIG_FILE Environment Variable773
  - Clearing the CONFIG_FILE Environment Variable Settings774
- Displaying the Switch Boot Configuration774
Working with the Flash File System777
- Understanding How the Flash File System Works777
- Working with the Flash File System on the Switch778
Working with System Software Images787
- Software Image Naming Conventions788
- Upgrading the EPLD Images788
  - Upgrading the Supervisor Engine EPLD Image788
  - Upgrading the Nonsupervisor Engine Module EPLD Images789
- Comparing File Transfer Protocols791
- Downloading the Software Images Using FTP or TFTP791
- Uploading the System Software Images to an FTP or TFTP Server800
  - Preparing to Upload an Image to an FTP or TFTP Server801
  - Uploading the Software Images to an FTP or TFTP Server801
- Downloading the System Software Images Using Rcp802
- Uploading the System Software Images to an Rcp Server807
  - Preparing to Upload an Image to an Rcp Server808
  - Uploading the Software Images to an Rcp Server808
- Downloading the Crypto Images Using SCP808
- Preparing to Download an Image Using SCP809
- Downloading the Crypto Images Using SCP809
- Example SCP Download Procedure810
- Uploading the Crypto Images to an SCP Server811
  - Preparing to Upload an Image to an SCP Server811
  - Uploading the Crypto Images to an SCP Server812
- Downloading the Crypto Images Using SFTP812
- Uploading the Crypto Images to an SFTP Server813
- Downloading the Software Images over a Serial Connection on the Console Port814
- Downloading a System Image Using Xmodem or Ymodem819
- Verifying the Software Images821
Chapter 28 Working with Configuration Files823
- Working with the Configuration Files on the Switch823
- Working with the Configuration Files on the MSFC834
- Working with Profile Files838
  - Building Profile Files838
Chapter 29 Configuring System Message Logging843
- Understanding How the System Message Logging Works843
Configuring DNS859
- Understanding How DNS Works859
- DNS Default Configuration860
- Configuring DNS on the Switch860
Configuring CDP863
- Understanding How CDP Works863
- Default CDP Configuration864
- Configuring CDP on the Switch864
Configuring UDLD869
- Understanding How UDLD Works869
- Default UDLD Configuration870
- Configuring UDLD on the Switch871
Chapter 33 Configuring DHCP Snooping and IP Source Guard875
- Understanding How DHCP Snooping Works875
  - DHCP Snooping Configuration Guidelines876
- Configuring DHCP Snooping on a VLAN876
- Specifying the DHCP-Snooping Binding Limit on a Per-Port Basis885
- Specifying the DHCP-Snooping IP Address-To-MAC Address Binding on a Per-Port Basis886
- Displaying DHCP-Snooping Information886
  - Displaying the Binding Table886
  - Displaying the DHCP-Snooping Configuration and Statistics887
- Storing DHCP-Snooping Binding Entries to a Flash Device889
- Understanding How IP Source Guard Works890
  - IP Source Guard Configuration Guidelines890
- Enabling IP Source Guard on a Port891
- Displaying the IP Source Guard Information892
Chapter 34 Configuring NTP893
- Understanding How NTP Works893
- NTP Default Configuration894
- Configuring NTP on the Switch894
Chapter 35 Configuring Broadcast Suppression901
- Understanding How Broadcast Suppression Works901
- Configuring Broadcast Suppression on the Switch903
Chapter 36 Configuring Layer 3 Protocol Filtering907
- Understanding How Layer 3 Protocol Filtering Works907
- Default Layer 3 Protocol Filtering Configuration908
- Configuring Layer 3 Protocol Filtering on the Switch908
  - Enabling Layer 3 Protocol Filtering909
  - Disabling Layer 3 Protocol Filtering909
Chapter 37 Configuring the IP Permit List911
- Understanding How the IP Permit List Works911
- IP Permit List Default Configuration912
- Configuring the IP Permit List on the Switch912
Chapter 38 Configuring Port Security917
- Understanding How Port Security Works918
- Understanding How MAC-Address Monitoring Works919
- Port Security Configuration Guidelines920
- Configuring Port Security on the Switch920
Configuring the Switch Access Using AAA935
- Understanding How Authentication Works936
- Configuring Authentication on the Switch943
- Specifying Radius Servers960
- Configuring Kerberos Authentication967
- Verify the Configuration969
- Authentication Example977
- Understanding How Authorization Works978
- Configuring Authorization on the Switch980
- Understanding How Accounting Works986
- Configuring Accounting on the Switch989
CHAPTER 40 Configuring 802.1X Authentication40-1996
- Understanding How 802.1X Authentication Works996
- Default Authentication Configuration1005
- Authentication Configuration Guidelines1006
- Configuring 802.1X Authentication on the Switch1007
Configuring Mac Authentication Bypass1045
- Understanding How MAC Authentication Bypass Works1046
- MAC Authentication Bypass Configuration Guidelines and Restrictions1048
- Configuring MAC Authentication Bypass1050
- Configuring MAC Authentication Bypass with ACL Assignments1057
  - Configuring MAC Authentication Bypass with Qos Acls1057
- Configuring Agentless Hosts for NAC Auditing with MAB1058
CHAPTER 42 Configuring Web-Based Proxy Authentication1064
- Understanding How Web-Based Proxy Authentication Works1064
- Multiple Hosts Per Port1068
- High Availability1068
- Host State1068
- Interaction with Other Features1069
- Default Web-Based Proxy Authentication Configuration1070
- Web-Based Authentication Guidelines and Restrictions1070
- Configuring Web-Based Proxy Authentication1071
CHAPTER 43 Tracking Host Aging43-11079
- Understanding How Host Aging Is Tracked1079
- Configuring IP Device Tracking Globally1079
  - Specifying the IP Device Tracking Interval1080
  - Specifying the IP Device Tracking Count1080
- Configuring IP Device Tracking on a Port1081
- Configuring Network Admission Control1085
CHAPTER 44 Configuring Network Admission Control1086
- Configuring Network Admission Control with LAN Port IP1086
CHAPTER 45 Configuring Unicast Flood Blocking1123
- Understanding How Unicast Flood Blocking Works1123
- Unicast Flood Blocking Configuration Guidelines1124
- Configuring Unicast Flood Blocking on the Switch1124
CHAPTER 46 Configuring the Switch Fabric Modules46-11127
- Understanding How the Integrated 720-Gbps Switch Fabric Works1127
- Understanding How the External Switch Fabric Module Works1127
- Forwarding Modes1127
- Configuring and Monitoring the Integrated Switch Fabric and Switch Fabric Module on the Switch1127
CHAPTER 47 Configuring SNMP47-11139
- SNMP Terminology1139
- Understanding How SNMP Works1142
  - Security Models and Levels1142
  - SNMP Ifindex Persistence1143
- Understanding How Snmpv1 and Snmpv2C Work1143
- Understanding How Snmpv3 Works1145
  - SNMP Entity1145
  - Applications1147
- Enabling and Disabling SNMP Processing1148
- Configuring Snmpv1 and Snmpv2C on the Switch1149
- Snmpv1 and Snmpv2C Enhancements in Software Release 7.5(1)1150
- Configuring Snmpv3 on the Switch1154
CHAPTER 48 Configuring RMON48-11159
- Understanding How RMON Works1159
- Enabling RMON on the Switch1160
- Viewing the RMON Data1160
- Supported RMON and RMON2 MIB Objects1161
CHAPTER 49 Configuring SPAN, RSPAN and the Mini Protocol Analyzer49-11163
- Understanding How SPAN and RSPAN Work1163
- SPAN, RSPAN and Mini Protocol Analyzer Session Limits1167
- Configuring SPAN on the Switch1168
- Configuring RSPAN on the Switch1172
- Configuring the Mini Protocol Analyzer on the Switch1181
Chapter 50 Using Switch Topn Report1188
- Understanding How the Switch Topn Reports Utility Works1188
- Running and Viewing Switch Topn Reports1190
CHAPTER 51 Configuring Multicast Services51-11193
- Understanding How Multicasting Works1193
- Configuring IGMP Snooping on the Switch1202
- Configuring GMRP on the Switch1212
- Configuring Multicast Router Ports and Group Entries on the Switch1219
- Understanding How RGMP Works1221
- Configuring RGMP on the Switch1223
  - Configuring RGMP on the Supervisor Engine1223
  - Configuring RGMP on the MSFC1227
- Displaying the Multicast Protocol Status1227
- Understanding How Bidirectional PIM Works1227
- Configuring Bidirectional PIM on the Switch1228
CHAPTER 52 Configuring Qos52-11233
- Understanding How Qos Works1233
- Qos Default Configuration1262
- Qos Configuration Guidelines and Restrictions1269
- Configuring Qos on the Switch1270
CHAPTER 53 Using Automatic Qos53-11327
- Understanding How Automatic Qos Works1327
- Qos Overview1328
  - Typical Cos and DSCP Values for Voice and Video Networks1328
    - Qos Scenario—Cisco IP Phone1329
    - Qos Scenario—Cisco Softphone1329
- Using the Automatic Qos Macro on the Switch1329
- Using Automatic Qos in Your Network1354
- Hardware and Software Requirements1357
CHAPTER 54 Configuring ASLB54-11358
- Understanding How ASLB Works1358
- Cabling Guidelines1363
- Configuring ASLB on the Switch1363
- ASLB Configuration Example1374
- ASLB Redundant Configuration Example1377
- Troubleshooting the ASLB Configuration1381
- Hardware and Software Requirements1383
CHAPTER 55 Configuring a Voip Network55-11384
- Understanding How a Voip Network Works1384
- Understanding How CDP and Voip Work1392
- Configuring Voip on a Switch1392
- Using Smartports1420
CHAPTER 56 Configuring the MSFC Cisco IOS Features56-11440
- IP-In-IP Tunneling1440
  - IP-In-IP Configuration Guidelines1440
- Wccp1441

Cisco WS-C6506 - Disabling DNS

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