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Prerequisites for Implementing IP Service Level Agreements
Knowledge of general networking protocols and your specific network design is assumed. Familiarity with
network management applications is helpful. We do not recommend scheduling all the operations at the same
time as this could negatively affect your performance.
You must be in a user group associated with a task group that includes the proper task IDs. The command
reference guides include the task IDs required for each command. If you suspect user group assignment is
preventing you from using a command, contact your AAA administrator for assistance.
Restrictions for Implementing IP Service Level Agreements
•
The maximum number of IP SLA operations that is supported by Cisco IOS XR Software is 2048.
•
We do not recommend scheduling all the operations at the same time as this could negatively affect your
performance.
•
Note that setting the frequency to less than 60 seconds will increase packet scalability exponentially and
this could negatively impact your configurable IP SLA IPSLA operation performance when scheduled
operations have same start-time.
•
IP SLA is not HA capable.
•
Note that the Cisco ASR 9000 Series Aggregation Services Router does not support hardware
timestamping.
•
The current validated scale numbers for scheduling of an operation at a same time are as follows:
◦
The maximum number of UDP echo operations is 400 operations with default frequency.
◦
The maximum number of UDP echo operations when measuring reachability only is 2000 operations
with default frequency.
◦
The maximum number of UDP jitter operations is 400 operations with default frequency.
◦
The maximum number of UDP jitter operations when measuring reachability only is 1000 operations
with default frequency.
◦
The maximum number of ICMP echo operations is 400 operations with default frequency.
◦
The maximum number of ICMP echo operations when measuring reachability only is 2000
operations with default frequency.
◦
The maximum number of ICMP echo-path operations is 400 operations with default frequency.
◦
The maximum number of ICMP echo-path operations when measuring reachability only is 2000
operations with default frequency.
◦
The maximum ICMP jitter operations that can be configured with default frequency with out packet
discards is 75.
◦
The maximum MPLS LSP ping operations that can be configured with default frequency with out
packet discards is 100.
◦
The maximum MPLS LSP trace operations that can be configured with default frequency with out
packet discards is 100.
Cisco ASR 9000 Series Aggregation Services Router System Monitoring Configuration Guide, Release 4.2.x
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Implementing IP Service Level Agreements
Prerequisites for Implementing IP Service Level Agreements