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Implementing IP Service Level Agreements
• The maximum number of IP SLA configurable operations that is supported by Cisco IOS XR Software
is 2000.
• The current validated scale numbers for scheduling operations are as follows:
• We do not recommend scheduling all the operations at the same start time as this may affect the
performance. At the same start time, not more than 10 operations per second should be scheduled. We
recommend using the
Note
• IP SLA is not HA capable.
• Consider the following guidelines before configuring the frequency, timeout, and threshold commands.
◦ The number of UDP echo operations is 1000 operations with default frequency.
◦ The number of UDP jitter operations is 1000 operations with default frequency.
◦ The number of ICMP echo operations is 1000 operations with default frequency.
◦ The number of ICMP echo-path operations is 400 operations with default frequency.
◦ The ICMP jitter operations that can be configured with default frequency without packet loss is
75.
◦ The MPLS LSP ping operations that can be configured with default frequency without packet loss
is 100.
◦ The MPLS LSP trace operations that can be configured with default frequency without packet loss
is 100.
start after
Setting the frequency to less than 60 seconds will increase the number of packets sent.
But this could negatively impact the performance of IP SLA operation when scheduled
operations have same start time.
◦ For the UDP and ICMP jitter operation, the following guidelines are recommended:
• frequency > timeout + 2 seconds + num_packets * packet_interval
• timeout > rtt_threshold
• num_packet > loss_threshold
◦ For all other IP SLAs operations, the following configuration guideline is recommended:
◦ frequency > timeout > rtt_threshold
Cisco ASR 9000 Series Aggregation Services Router System Monitoring Configuration Guide, Release 4.2.x
Restrictions for Implementing IP Service Level Agreements
configuration.
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