In continuation to Cisco Medianet Introduction blog, This blog explains the configuration of Cisco routers to export Medianet related information . In the latest IOS version, Cisco adds Performance Monitor parameter to its NetFlow export. So, with NetFlow traffic analysis, we gain bandwidth monitoring and performance monitor of business critical application.
Cisco Performance Monitor:-
The performance impact on business critical application on the network is due to the following parameters jitter, latency, packet loss, low RTT. The Cisco Performance Monitor will help to monitor Jitter, Latency, Packet Loss and RTT for each flow packets exported from the router.
Performance Monitoring is important for Video traffic because the delivery of LIVE video should be with high definition and zero delay. As mentioned in the earlier post, voice & video traffic would quadruple by the end of 2012. So, video traffic should be given high priority when it comes to quality and performance.
Cisco Medianet in NetFlow Analyzer :-
This feature helps you to monitor and analyze voice, video and data traffic and report on loss, latency and jitter thereby helping you optimize rich media applications. NetFlow Analyzer uses this feature of Cisco’s Medianet to report on the rich media traffic. It makes you aware of the volume and quality of media traffic in your network bandwidth. NetFlow Analyzer reports on the volume of media traffic, round trip time, packet loss and jitter along with the source, destination or application that is responsible for media traffic. These reports help you isolate network issues with regard to rich media applications and determine the quality of media traffic.
- The Device should run Cisco IOS which supports Cisco Performance Monitor
IOS version :- 12.4(13r)T or above
Software Version :- 15.1(3)T or above.
- IPv4 Traffic
- The networking device must be configured for IPv4 routing.
- Cisco Express Forwarding or distributed Cisco Express Forwarding must be enabled on your router and on any interfaces on which you want to enable Cisco Performance Monitor.
Configuring Cisco Performance Monitor:-
The configuration for Cisco Performance Monitor is quite similar to Flexible NetFlow configuration. This involves following steps:
- Configuring Flow Exporter
- Configuring Flow Record
- Configuring Flow Monitor
- Creating Class
- Creating Policy for performance monitor
- Attaching the policy to monitored interfaces
Flow Exporter Configuration:-
The flow exporter defines the destination to which NetFlow packets has to exported.
flow exporter ManageEngine
destination 192.0.2.1 // NetFlow Analyzer listener port
transport udp 9996 // Default listener port for NetFlow Analyzer
option exporter-stats timeout 60
template data timeout 60
Flow Record Configuration:-
Here we are going to define records that corresponds to Performance and regular Flexible NetFlow fields.
flow record ManageEngine
match ipv4 protocol
match ipv4 source address
match ipv4 destination address
match transport source-port
match transport destination-port
collect routing forwarding-status
collect ipv4 dscp
collect ipv4 ttl
collect ipv4 source mask
collect ipv4 destination mask
collect transport packets expected counter
collect transport packets lost counter
collect transport packets lost rate
collect transport round-trip-time
collect transport event packet-loss counter
collect transport rtp jitter mean
collect transport rtp jitter minimum
collect transport rtp jitter maximum
collect interface input
collector interface output
collect counter bytes
collect counter packets
collect timestamp interval
collect application media bytes counter
collect application media bytes rate
collect application media packets counter
collect application media packets rate
collect application media event
collect monitor event
Flow Monitor Configuration :-
A flow monitor is the one that caches all the traffic passing through the applied interface and the flow exporter will export all the traffic as UDP datagram to NetFlow Analyzer server.
flow monitor ManageEngine
timeout active 60
timeout inactive 60
Flow Class Creation :-
A Class is the one which specifies the filter that determines which flow traffic to monitor.
Policy Creation for Performance Monitor:
Policy creation for Performance Monitor is shown below.
Router(Config)#policy-map type performance-monitor ManageEngine
Router(config-pmap-c)#Flow monitor ManageEngine
Router(config-pmap-C)#monitor metric rtp
Router(config-pmap-c-mrtp) clock-rate 8 9600
Router(config-pmap-c-mrtp) max-dropout 2
Router(config-pmap-c-mrtp) max-reorder 4
Router(config-pmap-c-mrtp)# min-sequential 2
Router(config-pmap-c-mrtp)# ssrc maximum 20
Router(config-pmap-c)# monitor parameters
Router(config-pmap-c-mparam)# flows 40
Router(config-pmap-c-mparam)# history 4
Router(config-pmap-c-mparam)# timeout 20
Router(config-pmap-c)# react 41 rtp-jitter-average
Attaching the Policy to Interface:-
The created policy is now been attached to an interface for performance monitoring:
service-policy type performance-monitor input ManageEngine
You can verify the policy applied details by running following command:
show policy-map type performance-monitor interface FastEthernet0/0
Once the router is configured as mentioned above, You are ready to monitor device for Cisco Medianet. We will explain about each report generated by Cisco Medinet in our next blog.
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