Table Of Contents

SNMP Support for VLAN Subinterfaces

Feature Overview

Benefits

Supported Platforms

Supported Standards, MIBs, and RFCs

Configuration Tasks

Enabling the SNMP Agent on VLAN Subinterfaces

Verifying VLAN Subinterfaces

Configuration Examples

Enabling the SNMP Agent for VLAN Subinterfaces Example

Command Reference

SNMP Support for VLAN Subinterfaces

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Feature History

Release	Modification
Cisco IOS	For information about feature support in Cisco IOS software, use Cisco Feature Navigator.

This feature module describes the SNMP Support for VLAN Subinterfaces feature. It includes information on the benefits of the new feature, supported platforms, supported standards, and the commands necessary to configure the SNMP Support for VLAN Subinterfaces feature.

This document includes the following sections:

•Feature Overview

•Supported Platforms

•Supported Standards, MIBs, and RFCs

•Verifying VLAN Subinterfaces

•Command Reference

Feature Overview

The SNMP Support for VLAN Subinterfaces feature provides mib-2 interfaces sparse table support for Fast Ethernet subinterfaces. This enhancement is similar to the functionality supported in Frame Relay subinterfaces.

Benefits

Sparse table support for the interfaces table on Fast Ethernet subinterfaces provides customers accustomed to Frame Relay subinterfaces the same functionality.

Supported Platforms

•Cisco 2600 series

•Cisco 3600 series

•Cisco 4000-m series

•Cisco 7200 series

•Cisco 7500 series

Supported Standards, MIBs, and RFCs

Standards

None

MIBs

None

For descriptions of supported MIBs and how to use MIBs, see the Cisco MIB web site on CCO at http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.

RFCs

•RFC 1573

Configuration Tasks

To configure SNMP Support for VLAN Subinterfaces, complete the tasks in the following section:

•Enabling the SNMP Agent on VLAN Subinterfaces

Enabling the SNMP Agent on VLAN Subinterfaces

To enable the SNMP agent on VLAN subinterfaces, use the following commands in global configuration mode:

	Command	Purpose
Step 1	Router(config)# snmp community public	Enables the SNMP agent for remote access.
Step 2	Router(config)# interface FastEthernet slot/port	Selects a particular Fast Ethernet interface for configuration.
Step 3	Router(config)#  encapsulation isl vlan-identifier	Enables the Inter-Switch Link.
Step 4	Router(config)# ip address ip-address mask	Sets a primary or secondary IP address for an interface.

Verifying VLAN Subinterfaces

To display traffic count on subinterfaces, use the following command in privileged EXEC mode:

Command	Purpose
Router# show vlans	Displays VLAN subinterfaces.

Configuration Examples

This section provides the following configuration example:

•Enabling the SNMP Agent for VLAN Subinterfaces Example

Enabling the SNMP Agent for VLAN Subinterfaces Example

The following configuration example shows you how to enable the SNMP agent on the router with VLAN subinterfaces to monitor the SNMP application remotely:

snmp community public

!

interface FastEthernet4/0.100

 encapsulation isl 100

 ip address 192.168.10.21 255.255.255.0

!

interface FastEthernet4/0.200

 encapsulation isl 200

 ip address 172.21.200.11 255.255.255.0

!

interface FastEthernet4/1.1

 encapsulation isl 10

 ip address 171.69.2.111 255.255.255.0

Command Reference

The following commands are introduced or modified in the feature or features documented in this module. For information about these commands, see the Cisco IOS Network Management Command Reference at http://www.cisco.com/en/US/docs/ios/netmgmt/command/reference/nm_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.

•show vlans

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