Table Of Contents

cGVRP

Contents

Restrictions for cGVRP

Information About cGVRP

GARP/GVRP Definition

cGVRP Overview

GVRP Interoperability with VTP and VTP Pruning

GVRP interoperability with Other Software Features and Protocols

STP

DTP

VTP

EtherChannel

High Availability

How to Configure cGVRP

Configuring Compact GVRP

Disabling mac-learning on VLANs

Enabling a Dynamic VLAN

Troubleshooting the cGVRP Configuration

Configuration Examples for cGVRP

Configuring cGVRP: Example

Disabling mac-learning on VLANs: Example

Enabling a Dynamic VLAN: Example

Verifying CE Ports Configured as Access Ports: Example

Verifying CE Ports Configured as ISL Ports: Example

Verifying CE Ports Configured in Fixed Registration Mode: Example

Verifying CE Ports Configured in Forbidden Registration Mode: Example

Verifying cGVRP: Example

Verifying Disabled mac-learning on VLANs: Example

Verifying Dynamic VLAN: Example

Verifying Local Association Due to .1q trunk: Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Feature Information for cGVRP

cGVRP

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First Published: February 27, 2007

Last Updated: February 27, 2007

The Compact (c) Generic Attribute Registration Protocol (GARP) VLAN Registration Protocol (GVRP) feature reduces CPU time for transmittal of 4094 VLAN states on a port.

Finding Feature Information in This Module

Your Cisco IOS software release may not support all of the features documented in this module. To reach links to specific feature documentation in this module and to see a list of the releases in which each feature is supported, use the "clear gvrp statistics" section on page 19.

Finding Support Information for Platforms and Cisco IOS and Catalyst OS Software Images

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Contents

•Restrictions for cGVRP

•Information About cGVRP

•How to Configure cGVRP

•Configuration Examples for cGVRP

•Additional References

Restrictions for cGVRP

•A non-Cisco device can only interoperate with a Cisco device through .1Q trunks.

•VLAN Mapping is not supported with GVRP.

•cGVRP and Connectivity Fault Management(CFM) can coexist but if the line card (LC) or supervisor does not have enough mac-match registers to support both protocols, the cGVRP ports on those LCs are put in error disabled state. To use Layer 2 functionality, disable cGVRP on those ports and configure shut/no shut.

•cGVRP functionality applies only to interfaces configured for Layer 2 (switchport) functionality.

•Native VLAN Tagging causes frames sent to the native VLAN of the .1Q trunk ports to be encapsulated with .1Q tags. Problems may arise with other GVRP participants on the LAN because they may not be able to admit tagged GVRP PDUs. Caution must be exercised if both features are enabled at the same time.

•802.1X authentication and authorization takes place after the port becomes link-up and before the Dynamic Trunking Protocol (DTP) negotiations start prior to GVRP running on the port.

•Port Security works independently from GVRP and it may be limited to the number of other GVRP participants on a LAN that a GVRP enabled port on a device can communicate with.

•GVRPs cannot be configured and run on a sub-interface.

•GVRP and UniDirectional Link Routing (UDLR) should not be enabled on the same interface because UDLR limits frames in one direction on the port and GVRP is a two way communication protocol.

•Additional memory is required to store GARP/GVRP configurations and states per GVRP enabled port, but it can be dynamically allocated on demand.

•GARP Multicast Registration Protocol (GMRP) is not supported.

Information About cGVRP

To configure cGVRP, you should understand the following concepts:

•GARP/GVRP Definition

•cGVRP Overview

•How to Configure cGVRP

GARP/GVRP Definition

GVRP enables automatic configuration of switches in a VLAN network allowing network devices to dynamically exchange VLAN configuration information with other devices. GVRP is based on GARP which defines procedures for registering and deregistering attributes with each other. It eliminates unnecessary network traffic by preventing attempts to transmit information to unregistered users.

GVRP is defined in IEEE 802.1Q.

cGVRP Overview

GVRP is a protocol that requires extensive CPU time in order to transmit all 4094 VLAN states on a port. In Compact mode only one PDU is sent and it includes the states of all the 4094 VLANs on a port.

VLAN pruning can be accomplished faster by running in a special mode, Fast Compact Mode, and on point-to-point links.

In Compact GVRP a GVRP PDU may be sent out the port if the port is in forwarding state in a spanning tree instance. GVRP PDUs must be transmitted in the native VLAN of .1Q trunks.

GVRP Interoperability with VTP and VTP Pruning

VTP Pruning is an extension of VTP. It has its own Join message that can be exchanged with VTP PDUs. VTP PDUs can be transmitted on both .1Q trunks and ISL trunks. A VTP capable device is in either one of the three VTP modes: Server, Client, or Transparent.

When VTP Pruning and GVRP are both enabled globally, VTP Pruning is run on ISL trunks, and GVRP is run on .1Q trunks.

Compact GVRP has two modes: Slow Compact Mode, and Fast Compact Mode. A port can be in Fast Compact Mode if it has one GVRP enabled peer on the same LAN segment, and the peer is capable of operating in Compact Mode. A port is in Slow Compact Mode if there are multiple GVRP participants on the same LAN segment operating in Compact Mode.

GVRP interoperability with Other Software Features and Protocols

STP

Spanning Tree Protocol (STP) may run in one of the three STP modes: Multiple Spanning Tree(MST), Per VLAN Spanning Tree (PVST), or Rapid PVST. An STP mode range causes the forwarding ports to leave the forwarding state as STP has to reconverge. This may cause GVRP to have its own topology change as Join messages my be received on some new ports and Leave timers may expire on some others.

DTP

DTP negotiates the port mode (trunk vs. non-trunk) and the trunk encapsulation type between two DTP enabled ports. After negotiation DTP may set the port to either ISL trunk, or .1Q trunk, or non trunk. DTP negotiation occurs after ports become link-up and before they become forwarding in spanning trees. If GVRP is administratively enabled on a port and the device, it should be initialized after the port is negotiated to be a .1Q trunk.

VTP

VTP version 3 expands the range of VLANs that can be created and removed via VTP. VTP Pruning is available for VLAN 1 - 1005 only.

EtherChannel

When multiple .1Q trunk ports are grouped by either Port Aggregation Protocol (PAgP) or Link Aggregation Control Protocol (LACP) to become an etherchannel, the etherchannel can be configured as a GVRP participant. The physical ports in the etherchannel cannot be GVRP participants by themselves. Since an etherchannel is treated like one virtual port by STP, the GVRP application can learn the STP state change of the etherchannel just like any physical port. The etherchannel, not the physical ports in the channel, constitutes the GARP Information Propagation (GIP) context.

High Availability

High Availability (HA) is a redundancy feature in IOS. On platforms that support HA and State SwitchOver (SSO), many features and protocols my resume working in a couple of seconds after the system encounters a failure such as a crash of the active supervisor in a Catalyst 7600 switch. GVRP needs to be configured to enable user configurations, and protocol states should be synched to a standby system. If there is a failure of the active system, the GVRP in the standby system which now becomes active, has all the up-to-date VLAN registration information.

How to Configure cGVRP

:This procedure contains the following tasks:

•Configuring Compact GVRP

•Disabling mac-learning on VLANs

•Enabling a Dynamic VLAN: Example

Configuring Compact GVRP

To configure compact GVRP, perform the following task.

SUMMARY STEPS

1. enable

2. configure terminal

3. gvrp global

4. exit

DETAILED STEPS

	Command or Action	Purpose
Step 1	enable Example: Router> enable	Enables privileged EXEC mode. •Enter your password if prompted.
Step 2	configure terminal Example: Router# configure terminal	Enters global configuration mode.
Step 3	grvp global Example: Router(config)# gvrp global	Configures global GVRP and enables GVRP on all .1Q trunks.
Step 4	interface type number Example: Router(config)# interface GigabitEthernnet 12/15	Exits configuration mode.
Step 5	gvrp timer join timer-value Example: Router(config-if)# gvrp timer join 1000	Sets the period timers.
Step 6	gvrp registration normal Example: Router(config-if)# gvrp registration normal	Sets the registrar for normal response to incoming GVRP messages.

Disabling mac-learning on VLANs

To disable mac-learning on VLANs, perform the following task.

SUMMARY STEPS

1. enable

2. configure terminal

3. gvrp mac-learning auto

4. exit

DETAILED STEPS

	Command or Action	Purpose
Step 1	enable Example: Router> enable	Enables privileged EXEC mode. •Enter your password if prompted.
Step 2	configure terminal Example: Router# configure terminal	Enters global configuration mode.
Step 3	gvrp mac-learning auto Example: Router(config)# gvrp mac-learning auto	Disables learning of mac-entries.
Step 4	exit Example: Router(config)# exit	Exits configuration mode.

Enabling a Dynamic VLAN

To enable a dynamic VLAN, perform the following task.

SUMMARY STEPS

1. enable

2. configure terminal

3. gvrp vlan create

4. exit

DETAILED STEPS

	Command or Action	Purpose
Step 1	enable Example: Router> enable	Enables privileged EXEC mode. •Enter your password if prompted.
Step 2	configure terminal Example: Router# configure terminal	Enters global configuration mode.
Step 3	gvrp vlan create Example: Router(config)# gvrp vlan create	Enables a dynamic VLAN when cGRVP is configured.
Step 4	exit Example: Router(config)# exit	Exits configuration mode.

Troubleshooting the cGVRP Configuration

Perform this task to troubleshoot the cGVRP configuration.

Use the show gvrp summary and show gvrp interface commands to display configuration information and interface states, and the debug gvrp command to enable all or a limited output messages related to an interface.

SUMMARY STEPS

1. enable

2. show gvrp summary

3. show gvrp interface

4. debug gvrp

5. clear gvrp statistics

DETAILED STEPS

	Command or Action	Purpose
Step 1	enable Example: Router> enable	Enables privileged EXEC mode. •Enter your password if prompted.
Step 2	show gvrp summary Example: Router# show gvrp summary	Displays the GVRP configuration.
Step 3	show gvrp interface Example: Router# show gvrp interface	Displays the GVRP interface states.
Step 4	debug gvrp Example: Router# debug gvrp	Displays GVRP debugging information.
Step 5	clear gvrp statistics Example: Router# clear gvrp statistics interface 12/15	Clears GVRP statistics on all interfaces.

Configuration Examples for cGVRP

This section provides the following configuration examples:

•Configuring cGVRP: Example

•Verifying CE Ports Configured as Access Ports: Example

•Enabling a Dynamic VLAN: Example

•Verifying CE Ports Configured as Access Ports: Example

•Verifying CE Ports Configured as ISL Ports: Example

•Verifying CE Ports Configured in Fixed Registration Mode: Example

•Verifying CE Ports Configured in Forbidden Registration Mode: Example

•Verifying cGVRP: Example

•Verifying Disabled mac-learning on VLANs: Example

•Verifying Dynamic VLAN: Example

•Verifying Local Association Due to .1q trunk: Example

Configuring cGVRP: Example

The following example shows how to configure compact GVRP.

Router(config)# gvrp global

Disabling mac-learning on VLANs: Example

The following example shows how to disable mac-learning on VLANs configured with cGVRP.

Router(config)# gvrp mac-learning auto

Enabling a Dynamic VLAN: Example

The following example shows how to configure a dynamic VLAN.

Router(config)# gvrp global

Verifying CE Ports Configured as Access Ports: Example

Topology:

CE1 - gi3/15 R1 gi3/1 - dot1q trunk - gi3/1 R2 gi12/15 - CE2

R1#show running-config interface gi3/15

Building configuration...

Current configuration : 129 bytes

!

interface GigabitEthernet3/15

 switchport

 switchport access vlan 2

 switchport mode access

 spanning-tree portfast trunk

end

R1#show running-config interface gi3/1 

Building configuration...

Current configuration : 109 bytes

!

interface GigabitEthernet3/1

 switchport

 switchport trunk encapsulation dot1q

 switchport mode trunk

end

R2#show running-config interface gi12/15

Building configuration...

Current configuration : 168 bytes

!

interface GigabitEthernet12/15

 switchport

 switchport access vlan 2

 switchport trunk encapsulation dot1q

 switchport mode access

 spanning-tree portfast trunk

end

R2#show running-config interface gi3/1  

Building configuration...

Current configuration : 144 bytes

!

interface GigabitEthernet3/1

 switchport

 switchport trunk encapsulation dot1q

 switchport mode trunk

 switchport backup interface Gi4/1

end

R1#show gvrp summary

GVRP global state           : enabled

GVRP VLAN creation          : disabled

VLANs created via GVRP      : none

MAC learning auto provision : disabled

Learning disabled on VLANs  : none

R1#show gvrp interface

Port      Status    Mode            Registrar State

Gi3/1     on        fastcompact        normal

Port      Transmit Timeout   Leave Timeout   Leaveall Timeout

Gi3/1     200                600             10000

Port      Vlans Declared

Gi3/1     2

Port      Vlans Registered

Gi3/1     2

Port      Vlans Registered and in Spanning Tree Forwarding State

Gi3/1     2

R2#show gvrp summary

GVRP global state           : enabled

GVRP VLAN creation          : disabled

VLANs created via GVRP      : none

MAC learning auto provision : disabled

Learning disabled on VLANs  : none

R2#show gvrp interface

Port      Status    Mode            Registrar State

Gi3/1     on        fastcompact        normal

Port      Transmit Timeout   Leave Timeout   Leaveall Timeout

Gi3/1     200                600             10000

Port      Vlans Declared

Gi3/1     2

Port      Vlans Registered

Gi3/1     2

Port      Vlans Registered and in Spanning Tree Forwarding State

Gi3/1     2

Verifying CE Ports Configured as ISL Ports: Example

Topology

CE1 - gi3/15 R1 gi3/1 - dot1q trunk - gi3/1 R2 gi12/15 - CE2

R1#show running-config interface gi3/15

Building configuration...

Current configuration : 138 bytes

!

interface GigabitEthernet3/15

 switchport

 switchport trunk encapsulation isl

 switchport mode trunk

 spanning-tree portfast trunk

end

R1#show running-config interface gi3/1 

Building configuration...

Current configuration : 109 bytes

!

interface GigabitEthernet3/1

 switchport

 switchport trunk encapsulation dot1q

 switchport mode trunk

end

R2#show running-config interface gi12/15

Building configuration...

Current configuration : 139 bytes

!

interface GigabitEthernet12/15

 switchport

 switchport trunk encapsulation isl

 switchport mode trunk

 spanning-tree portfast trunk

end

R2#show running-config interface gi3/1  

Building configuration...

Current configuration : 144 bytes

!

interface GigabitEthernet3/1

 switchport

 switchport trunk encapsulation dot1q

 switchport mode trunk

 switchport backup interface Gi4/1

end

R1#show gvrp summary                   

GVRP global state           : enabled

GVRP VLAN creation          : disabled

VLANs created via GVRP      : none

MAC learning auto provision : disabled

Learning disabled on VLANs  : none

R1#show gvrp interface                 

Port      Status    Mode            Registrar State

Gi3/1     on        fastcompact        normal

Port      Transmit Timeout   Leave Timeout   Leaveall Timeout

Gi3/1     200                600             10000

Port      Vlans Declared

Gi3/1     1-10

Port      Vlans Registered

Gi3/1     1-2

Port      Vlans Registered and in Spanning Tree Forwarding State

Gi3/1     1-2

R1#sh vlan sum        

Number of existing VLANs           : 14

 Number of existing VTP VLANs      : 14

 Number of existing extended VLANs : 0

R2#show gvrp summary                    

GVRP global state           : enabled

GVRP VLAN creation          : disabled

VLANs created via GVRP      : none

MAC learning auto provision : disabled

Learning disabled on VLANs  : none

R2#show gvrp interface                  

Port      Status    Mode            Registrar State

Gi3/1     on        fastcompact        normal

Port      Transmit Timeout   Leave Timeout   Leaveall Timeout

Gi3/1     200                600             10000

Port      Vlans Declared

Gi3/1     1-2

Port      Vlans Registered

Gi3/1     1-10

Port      Vlans Registered and in Spanning Tree Forwarding State

Gi3/1     1-2

R2#sh vlan sum

Number of existing VLANs           : 6

 Number of existing VTP VLANs      : 6

 Number of existing extended VLANs : 0

Verifying CE Ports Configured in Fixed Registration Mode: Example

Router1 #show running-config interface gi3/15

Building configuration...

Current configuration : 165 bytes

!

interface GigabitEthernet3/15

 gvrp registration fixed

 switchport

 switchport trunk encapsulation dot1q

 switchport mode trunk

 spanning-tree portfast trunk

end

Router1 #show gvrp interface gigabitEthernet 3/15

Port      Status    Mode            Registrar State

Gi3/15    on        fastcompact        fixed

Port      Transmit Timeout   Leave Timeout   Leaveall Timeout

Gi3/15    200                600             10000

Port      Vlans Declared

Gi3/15    1-2

Port      Vlans Registered

Gi3/15    1-4094

Port      Vlans Registered and in Spanning Tree Forwarding State

Gi3/15    1-10

Verifying CE Ports Configured in Forbidden Registration Mode: Example

Router1 #show running-config interface gi3/15    

Building configuration...

Current configuration : 169 bytes

!

interface GigabitEthernet3/15

 gvrp registration forbidden

 switchport

 switchport trunk encapsulation dot1q

 switchport mode trunk

 spanning-tree portfast trunk

end

Router1 #show gvrp interface gigabitEthernet 3/15

Port      Status    Mode            Registrar State

Gi3/15    on        fastcompact     forbidden

Port      Transmit Timeout   Leave Timeout   Leaveall Timeout

Gi3/15    200                600             10000

Port      Vlans Declared

Gi3/15    1-2

Port      Vlans Registered

Gi3/15    none

Port      Vlans Registered and in Spanning Tree Forwarding State

Gi3/15    none

Verifying cGVRP: Example

The following example shows how to verify the compact GVRP configuration.

Router# show gvrp summary

GVRP global state           : enabled

GVRP VLAN creation          : disabled

VLANs created via GVRP      : none

MAC learning auto provision : disabled

Learning disabled on VLANS  : none

Verifying Disabled mac-learning on VLANs: Example

The following examples show how to verify that mac-learning has been disabled.

Router# show gvrp summary

GVRP global state           : enabled

GVRP VLAN creation          : enabled

VLANs created via GVRP      : 2-200

MAC learning auto provision : enabled

Learning disabled on VLANs  : 1-200

Router# show gvrp interface

Port      Status    Mode            Registrar State

Gi3/15    on        fastcompact        normal

Gi4/1     on        fastcompact        normal

Port      Transmit Timeout   Leave Timeout   Leaveall Timeout

Gi3/15    200                600             10000

Gi4/1     200                600             10000

Port      Vlans Declared

Gi3/15    1-200

Gi4/1     none

Port      Vlans Registered

Gi3/15    none

Gi4/1     1-200

Port      Vlans Registered and in Spanning Tree Forwarding State

Gi3/15    none

Gi4/1     1-200

Router# show mac- dy

Legend: * - primary entry

        age - seconds since last seen

        n/a - not available

  vlan   mac address     type    learn     age              ports

------+----------------+--------+-----+----------+--------------------------

No entries present.

Verifying Dynamic VLAN: Example

The following examples show how to verify the GVRP summary and interface.

Router# show gvrp summary

GVRP global state           : enabled

GVRP VLAN creation          : enabled

VLANs created via GVRP      : 2-200

MAC learning auto provision : disabled

Learning disabled on VLANs  : none

Router# show gvrp interface

Port      Status    Mode            Registrar State

Gi3/15    on        fastcompact         normal

Gi4/1     on        fastcompact         normal

Port      Transmit Timeout   Leave Timeout   Leaveall Timeout

Gi3/15    200                600             10000

Gi4/1     200                600             10000

Port      Vlans Declared

Gi3/15    1-200

Gi4/1     none

Port      Vlans Registered

Gi3/15    none

Gi4/1     1-200

Port      Vlans Registered and in Spanning Tree Forwarding State

Gi3/15    none

Gi4/1     1-200

Verifying Local Association Due to .1q trunk: Example

Topology

CE1 - gi3/15 R1 gi3/1 - dot1q trunk - gi3/1 R2 gi12/15 - CE2

Router1 #show running-config interface gi3/15

Building configuration...

Current configuration : 165 bytes

!

interface GigabitEthernet3/15

 gvrp registration fixed

 switchport

 switchport trunk encapsulation dot1q

 switchport mode trunk

 spanning-tree portfast trunk

end

Router2 #show running-config interface gi12/15

Building configuration...

Current configuration : 166 bytes

!

interface GigabitEthernet12/15

 gvrp registration fixed

 switchport

 switchport trunk encapsulation dot1q

 switchport mode trunk

 spanning-tree portfast trunk

end

Router1 #show gvrp summary                   

GVRP global state           : enabled

GVRP VLAN creation          : disabled

VLANs created via GVRP      : none

MAC learning auto provision : disabled

Learning disabled on VLANs  : none

Router1 #show gvrp interface                 

Port      Status    Mode            Registrar State

Gi3/1     on        fastcompact        normal

Gi3/15    on        fastcompact        fixed

Port      Transmit Timeout   Leave Timeout   Leaveall Timeout

Gi3/1     200                600             10000

Gi3/15    200                600             10000

Port      Vlans Declared

Gi3/1     1-10

Gi3/15    1-2

Port      Vlans Registered

Gi3/1     1-2

Gi3/15    1-4094

Port      Vlans Registered and in Spanning Tree Forwarding State

Gi3/1     1-2

Gi12/15   1-10

R2#show gvrp summary                    

GVRP global state           : enabled

GVRP VLAN creation          : disabled

VLANs created via GVRP      : none

MAC learning auto provision : disabled

Learning disabled on VLANs  : none

R2#show gvrp interface                  

Port      Status    Mode            Registrar State

Gi3/1     on        fastcompact         normal

Gi12/15   on        fastcompact         fixed

Port      Transmit Timeout   Leave Timeout   Leaveall Timeout

Gi3/1     200                600             10000

Gi12/15   200                600             10000

Port      Vlans Declared

Gi3/1     1-2

Gi12/15   1-2

Port      Vlans Registered

Gi3/1     1-10

Gi12/15   1-4094

Port      Vlans Registered and in Spanning Tree Forwarding State

Gi3/1     1-2

Gi12/15   1-2

Additional References

The following sections provide references related to the cGVRP feature.

Related Documents

Related Topic	Document Title
LAN Switching commands: complete command syntax, command mode, defaults, command history, usage guidelines, and examples	Cisco IOS LAN Switching Command Reference, Release 12.2SR

Standards

Standard	Title
No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.	—

MIBs

MIB	MIBs Link
No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature.	To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: http://www.cisco.com/go/mibs

RFCs

RFC	Title
No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.	—

Technical Assistance

Description	Link
The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies. Access to most tools on the Cisco Support website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a user ID or password, you can register on Cisco.com.	http://www.cisco.com/techsupport

Feature Information for cGVRP

Table 1 lists the release history for this feature.

Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.

Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

---

Note Table 1 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.

---

Table 1 Feature Information for cGVRP

Feature Name	Releases	Feature Information
cGVRP	12.2(33)SRB	The Compact (c) Generic Attribute Registration Protocol (GARP) VLAN Registration Protocol (GVRP) feature reduces CPU time for transmittal of 4094 VLAN states on a port. GVRP enables automatic configuration of switches in a VLAN network allowing network devices to dynamically exchange VLAN configuration information with other devices. GVRP is based on GARP which defines procedures for registering and deregistering attributes with each other. It eliminates unnecessary network traffic by preventing attempts to transmit information to unregistered users. GVRP is defined in IEEE 802.1Q. The following commands were introduced or modified to support this feature: clear gvrp statistics, debug gvrp, gvrp global, gvrp mac-learning, gvrp registration, gvrp timer, gvrp vlan create, show gvrp interface, show gvrp summary For information about these commands, see the Cisco IOS LAN Switching Command Reference at http://www.cisco.com/en/US/docs/ios/lanswitch/command/reference/lsw_book.html. For information about all Cisco IOS commands, go to the Command Lookup Tool at http://tools.cisco.com/Support/CLILookup or to the Cisco IOS Master Commands List.

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Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.

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