1.3.a (iv) Performance monitor

1.3.a Use IOS troubleshooting tools
1.3.a (i) debug, conditional debug
1.3.a (ii) ping, traceroute with extended options
1.3.a (iii) Embedded packet capture
1.3.a (iv) Performance monitor

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/media_monitoring/configuration/15-mt/mm-15-mt-book/mm-pasv-mon.html

Overview of Cisco Performance Monitor

Cisco Performance Monitor enables you to monitor the flow of packets in your network and become aware of any issues that might impact the flow before it starts to significantly impact the performance of the application in question. Performance monitoring is especially important for video traffic because high quality interactive video traffic is highly sensitive to network issues. Even minor issues that may not affect other applications can have dramatic effects on video quality.
Because Cisco Performance Monitor uses similar software components and commands as Cisco NetFlow and Cisco Flexible NetFlow, familiarity with these products will help you to understand how to configure Cisco Performance Monitor. These products provide statistics on packets flowing through a router and are the standard for acquiring IP operational data from IP networks. They provide data to support network and security monitoring, network planning, traffic analysis, and IP accounting. For more information about Cisco NetFlow and Cisco Flexible NetFlow, see the documents listed in the Additional References section.

Prerequisites for Configuring Cisco Performance Monitor

The following prerequisites must be met before you can configure Cisco Performance Monitor:

IPv4 Traffic

• The networking device must be configured for IPv4 routing.
• One of the following must be enabled on your router and on any interfaces on which you want to enable Cisco Performance Monitor: Cisco Express Forwarding or distributed Cisco Express Forwarding.

IPv6 Traffic

• Cisco Express Forwarding must be enabled on your router and on any interfaces on which you want to enable Cisco Performance Monitor. You can use the ipv6 cef command to enable Cisco Express Forwarding.

Configuration Components of Cisco Performance Monitor

To configure Cisco Performance Monitor, configure many of the same basic elements that you normally configure for Flexible NetFlow:

• Interface
• Policy
• Class
• Flow monitor
• Flow record
• Flow exporter

The figure below shows how these elements are related to each other. The elements at the bottom of the figure are configured first.

Figure 1. Cisco Performance Monitor Components

As shown above, a policy includes one or more classes. Each class has a flow monitor associated with it, and each flow monitor has a flow record and an optional flow exporter associated with it. These elements are configured in the following order:

1. Configure a flow record to specify the key and non-key fields that you want to monitor. This is configured using match and collect commands. You can also optimally configure a flow exporter to specify the export destination. For Cisco Performance Monitor, you must configure a performance-monitor type flow record.
2. Configure a flow monitor that includes the flow record and flow exporter. For Cisco Performance Monitor, you must configure a performance-monitor type flow monitor.
3. Configure a class to specify the filtering criteria using the class-map command.
4. Configure a policy to include one or more classes and one or more performance-monitor type flow monitors using the policy-map command. For Cisco Performance Monitor, you must configure performance-monitor type policies.
5. Associate a performance-monitor type policy to the appropriate interface using the service-policy type performance-monitor command.

Data That You Can Monitor Using Cisco Performance Monitor

You can monitor the following information by configuring a flow record with collect or match commands for the corresponding non-key fields:

Tip	For more information about these statistics, see the show performance monitor statuscommand in theCisco Media Monitoring Command Reference.

• IP Packet Count
• IP TTL
• IP TTL minimum
• IP TTL maximum
• Flow to Interface Mapping
• IP Flow destination address and port, source address and port, and protocol
• RTP Synchronization Source (SSRC)
• IP Octets Count
• Media Stream Packet Count
• Media Stream Octect Count
• Media Byte Rate
• Media Byte Count
• Media Packet Rate
• Media Packet Loss Count
• Media Packet Loss Rate
• Packets Expected Count
• Measured Rate
• Media Loss Event Count
• Round Trip Time (RTT)
• Interarrival Jitter (RFC3550) max
• Interarrival Jitter (RFC3550) min 2
• Interarrival Jitter (RFC3550) mean
• Media Rate Variation
• Monitor Event
• Media Error
• Media Stop
• IP Byte Count
• IP Byte Rate
• IP Source Mask
• IP Destination Mask
• Epoch of A Monitoring Interval
• Packet Forwarding Status
• Packet Drops
• DSCP and IPv6 Traffic Class

SNMP MIB Support for Cisco Performance Monitor

Cisco Performance Monitor provides support for the use of the industry-standard Simple Network Management Protocol (SNMP) to monitor media streams. This support is implemented with the addition of the following Cisco proprietary SNMP Management Information Base (MIB) modules:

• CISCO-FLOW-MONITOR-TC-MIB—Defines the textual conventions common to the following MIB modules.
• CISCO-FLOW-MONITOR-MIB—Defines the framework that describes the flow monitors supported by a system, the flows that it has learned, and the flow metrics collected for those flows.
• CISCO-RTP-METRICS-MIB—Defines objects that describe the quality metrics collected for RTP streams, similar to those described by an RTCP Receiver Report packet (RFC 3550).
• CISCO-IP-CBR-METRICS-MIB—Defines objects that describe the quality metrics collected for IP streams that have a Constant Bit Rate (CBR).

For detailed information about these MIBs, and to locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at http:/​/​www.cisco.com/​go/​mibs .
This feature also includes two new command-line interface (CLI) commands and one modified CLI command. The commands are as follows:

• snmp-server host—Enables the delivery of flow monitoring SNMP notifications to a recipient.
• snmp-server enable traps flowmon—Enables flow monitoring SNMP notifications. By default, flow monitoring SNMP notifications are disabled.
• snmp mib flowmon alarm history—Sets the maximum number of entries maintained by the flow monitor alarm history log.

For more information about these commands, see the Cisco IOS Master Command List .