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IP SLA Operation Scheduling
After an IP SLA operation is configured, you must schedule the operation to begin capturing statistics and
collecting error information. When scheduling an operation, the operation starts immediately or starts at a
certain month and day. In addition, an operation can be scheduled to be in pending state, which is used when
the operation is a reaction (threshold) operation waiting to be triggered. Normal scheduling of IP SLA operations
lets you schedule one operation at a time.
Multiple SLA probes with the same configuration (source and port number) must not be scheduled to run
simultaneously.
Note
IP SLA
—
Proactive Threshold Monitoring
This section describes the proactive monitoring capabilities for IP SLA that use thresholds and reaction
triggering. IP SLA allows you to monitor, analyze, and verify IP service levels for IP applications and services
to increase productivity, lower operational costs, and reduce occurrences of network congestion or outages.
IP SLA uses active traffic monitoring to measure network performance.
To perform the tasks that are required to configure proactive threshold monitoring using IP SLA, you must
understand these concepts:
IP SLA Reaction Configuration
IP SLA is configured to react to certain measured network conditions. For example, if IP SLA measures too
much jitter on a connection, IP SLA can generate a notification to a network management application or
trigger another IP SLA operation to gather more data.
IP SLA reaction configuration is performed by using the
ipsla reaction operation
command.
IP SLA Threshold Monitoring and Notifications
IP SLA supports threshold monitoring for performance parameters, such as jitter-average, bidirectional
round-trip time, and connectivity. For packet loss and jitter, notifications can be generated for violations in
either direction (for example, the source to the destination and the destination to the source) or for round-trip
values.
MPLS LSP Monitoring
The IP Service Level Agreements (SLAs) label switched path (LSP) monitor feature provides the capability
to proactively monitor Layer 3 Multiprotocol Label Switching (MPLS) Virtual Private Networks (VPNs).
This feature is useful for determining network availability or testing network connectivity between provider
edge (PE) routers in an MPLS VPN. When configured, MPLS LSP monitor automatically creates and deletes
IP SLA LSP ping or LSP traceroute operations based on network topology.
The MPLS LSP monitor feature also allows you to perform multi-operation scheduling of IP SLA operations
and supports proactive threshold violation monitoring through SNMP trap notifications and syslog messages.
Cisco ASR 9000 Series Aggregation Services Router System Monitoring Configuration Guide, Release 4.2.x
205
Implementing IP Service Level Agreements
IP SLA Operation Scheduling