IP SLAs MPLS VPN Aware

Table Of Contents

IP SLAs MPLS VPN Aware

Contents

Restrictions for IP SLAs MPLS VPN Aware

Information About IP SLAs MPLS VPN Aware

IP SLAs Operations for MPLS VPNs

Configuration Example for IP SLAs MPLS VPN Aware

Configuring an IP SLAs Operation for an MPLS VPN: Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Command Reference

vrf (IP SLA)

IP SLAs MPLS VPN Aware

The IP SLAs MPLS VPN Aware feature provides the capability to configure IP Service Level Agreements (SLAs) operations for specific Multiprotocol Label Switching (MPLS) Virtual Private Networks (VPNs). This feature is an enhancement to the Cisco IOS IP SLAs technology that allows Cisco customers to understand IP service levels, increase productivity, lower operational costs, and reduce the frequency of network outages within MPLS VPNs. IP SLAs utilizes active monitoring of network performance and can be used for network troubleshooting, network assessment, and health monitoring.

History for the IP SLAs MPLS VPN Aware Feature

Release

Modification

12.2(27)SBC

This feature was introduced.

Finding Support Information for Platforms and Cisco IOS Software Images

Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.

Contents

• Restrictions for IP SLAs MPLS VPN Aware

• Information About IP SLAs MPLS VPN Aware

• Configuration Example for IP SLAs MPLS VPN Aware

• Additional References

• Command Reference

Restrictions for IP SLAs MPLS VPN Aware

Only some types of IP SLAs operations support MPLS VPNs. When configuring the operation parameters for an IP SLAs operation, use the Cisco IOS context-sensitive help feature to determine if MPLS VPNs is supported.

Information About IP SLAs MPLS VPN Aware

To use the IP SLAs MPLS VPN Aware feature, you should understand the following concept:

• IP SLAs Operations for MPLS VPNs

IP SLAs Operations for MPLS VPNs

The IP SLAs MPLS VPN Aware feature provides the capability to configure a Cisco IOS IP SLAs operation for a particular VPN by specifying the name of its associated Virtual Routing and Forwarding (VRF) instance. When the MPLS VPN parameter is configured, network performance is measured between a source and destination belonging to the specified VPN.

For example, the IP SLAs path jitter operation can be used to measure approximate inter-packet delay variance (jitter) for each hop along the path from a source to a destination. Customers using MPLS VPNs use VRFs for different VPNs to support overlapping IP addresses in the PE router. By specifying a VRF (using the new vrf command in IP SLA monitor configuration mode) when configuring a path jitter operation, packets can be sent to measure network performance between a PE router and Customer Edge (CE) router using only the VPN specified.

Note The IP SLAs Responder feature supports IP SLAs operations for MPLS VPNs.

Configuration Example for IP SLAs MPLS VPN Aware

This section provides the following configuration example:

• Configuring an IP SLAs Operation for an MPLS VPN: Example

Configuring an IP SLAs Operation for an MPLS VPN: Example

The following examples show how to configure and schedule different types of IP SLAs operations that support MPLS VPNs. IP SLAs will automatically specify the source IP address when the vrf command is configured.

Echo Operation

rtr 1
type echo protocol ipIcmpEcho 1.1.1.1
vrf vpn1

rtr schedule 1 start now
Path Echo Operation

rtr 2
type pathEcho protocol ipIcmpEcho 1.1.1.1
vrf vpn1

rtr schedule 2 start now
Path Jitter Operation

rtr 3
type pathJitter dest-ipaddr 10.3.30.130
vrf vpn1

rtr schedule 7 start-time now life forever

Additional References

The following sections provide references related to the IP SLAs MPLS VPN Aware feature.

Related Documents

Related Topic

Document Title

Cisco IOS IP SLAs configuration

Cisco IOS Configuration Fundamentals and Network Management Configuration Guide, Release 12.2

Cisco IOS IP SLAs commands: complete command syntax, command mode, command history, defaults, usage guidelines, and examples

Cisco IOS IP SLAs Command Reference, Release 12.2 SB

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

CISCO-RTTMON-MIB

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 Technical Support website contains thousands of pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.

http://www.cisco.com/techsupport

Command Reference

This section documents one modified command only.

•

vrf (IP SLA)

To allow monitoring within Multiprotocol Label Switching (MPLS) Virtual Private Networks (VPNs) using Cisco IOS IP Service Level Agreements (SLAs) operations, use the vrf command in the appropriate submode of IP SLA monitor configuration or RTR configuration mode.

vrf vrf-name
Syntax Description

vrf-name

Name of the VPN.

Defaults

The MPLS VPN parameter is not configured for the IP SLAs operation.

Command Modes

IP SLA Monitor Configuration

ICMP echo configuration (config-sla-monitor-echo)
ICMP path echo configuration (config-sla-monitor-pathEcho)
ICMP path jitter configuration (config-sla-monitor-pathJitter)
UDP echo configuration (config-sla-monitor-udp)
UDP jitter configuration (config-sla-monitor-jitter)

RTR Configuration

ICMP echo configuration (config-rtr-echo)
ICMP path echo configuration (config-rtr-pathEcho)
ICMP path jitter configuration (config-rtr-pathJitter)
UDP echo configuration (config-rtr-udp)
UDP jitter configuration (config-rtr-jitter)

Note The configuration mode varies depending on the Cisco IOS release you are running and the operation type configured. See the "Usage Guidelines" section for more information.

Command History

Release

Modification

12.2(2)T

This command was introduced.

12.2(11)T

Syntax changed from vrfName to vrf with SAA Engine II.

12.0(26)S

This command was integrated into Cisco IOS Release 12.0(26)S. Support for this command was also added for ICMP path jitter operations.

12.3(2)T

Support for this command was added for ICMP path jitter operations.

12.2(20)S

This command was integrated into Cisco IOS Release 12.2(20)S. Support for this command was also added for path jitter operations.

12.2(27)SBC

This command was integrated into Cisco IOS Release 12.2(27)SBC.

Usage Guidelines

A VPN is commonly identified using the VPN routing and forwarding (VRF) name. If the vrf vrf-name command is configured for an IP SLAs operation, IP SLAs uses the vrf-name value to identify the VPN for this operation. This command should be used only if it is necessary to measure the response time over the VPN tunnel.

This command is supported only for the following operation types:

•ICMP echo

•ICMP path echo

•ICMP path jitter

•UDP echo

•UDP jitter

IP SLAs Operation Configuration Dependence on Cisco IOS Release

The Cisco IOS command used to begin configuration for an IP SLAs operation varies depending on the Cisco IOS release you are running (see Table 1). You must configure the type of IP SLAs operation (such as User Datagram Protocol [UDP] jitter or Internet Control Message Protocol [ICMP] echo) before you can configure any of the other parameters of the operation.

The configuration mode for the vrf (IP SLA) command varies depending on the Cisco IOS release you are running (see Table 1) and the operation type configured. For example, if you are running Cisco IOS Release 12.4 and the ICMP echo operation type is configured, you would enter the vrf (IP SLA) command in ICMP echo configuration mode (config-sla-monitor-echo) within IP SLA monitor configuration mode.

Table 1 Command Used to Begin Configuration of an IP SLAs Operation Based on Cisco IOS Release

Cisco IOS Release

Global Configuration Command

Command Mode Entered

12.3(14)T and 12.4

ip sla monitor

IP SLA monitor configuration

All other Cisco IOS releases

rtr

RTR configuration

Examples

The following examples illustrate how to configure an IP SLAs ICMP echo operation for an MPLS VPN. These examples show how test traffic can be sent in an already existing VPN tunnel between two endpoints. Note that the Cisco IOS command used to begin configuration for an IP SLAs operation varies depending on the Cisco IOS release you are running (see Table 1).

Note For ICMP path jitter operations, you must specify the source IP address or hostname when using the vrf command.

IP SLA Monitor Configuration

ip sla monitor 1
type echo protocol ipIcmpEcho 10.1.1.1
vrf vpn1
!
ip sla monitor schedule 1 start now
RTR Configuration

rtr 1
type echo protocol ipIcmpEcho 10.1.1.1
vrf vpn1
!
rtr schedule 1 start now
Related Commands

Command

Description

ip sla monitor

Begins configuration for an IP SLAs operation and enters IP SLA monitor configuration mode.

rtr

Begins configuration for an IP SLAs operation and enters RTR configuration mode.

� 2005 Cisco Systems, Inc. All rights reserved.

Related Topic	Document Title
Cisco IOS IP SLAs configuration	Cisco IOS Configuration Fundamentals and Network Management Configuration Guide, Release 12.2
Cisco IOS IP SLAs commands: complete command syntax, command mode, command history, defaults, usage guidelines, and examples	Cisco IOS IP SLAs Command Reference, Release 12.2 SB

Release	Modification
12.2(2)T	This command was introduced.
12.2(11)T	Syntax changed from vrfName to vrf with SAA Engine II.
12.0(26)S	This command was integrated into Cisco IOS Release 12.0(26)S. Support for this command was also added for ICMP path jitter operations.
12.3(2)T	Support for this command was added for ICMP path jitter operations.
12.2(20)S	This command was integrated into Cisco IOS Release 12.2(20)S. Support for this command was also added for path jitter operations.
12.2(27)SBC	This command was integrated into Cisco IOS Release 12.2(27)SBC.

Cisco IOS Release	Global Configuration Command	Command Mode Entered
12.3(14)T and 12.4	ip sla monitor	IP SLA monitor configuration
All other Cisco IOS releases	rtr	RTR configuration

Command	Description
ip sla monitor	Begins configuration for an IP SLAs operation and enters IP SLA monitor configuration mode.
rtr	Begins configuration for an IP SLAs operation and enters RTR configuration mode.