Juniper JUNOSE 11.2.X IP SERVICES, Configuration Manual

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Operation with High Availability
When high availability is enabled, the following occurs in the event of a switchover:
•
Any flows that are collected but not exported off of the router are lost.
•
Flow history is lost.
• Counters are reset to zero.
After the standby SRP becomes active, and all other applications indicate that they have
recovered, sampling and flow-collecting resume.
Platform Considerations
For information about modules that support J-Flow statistics on ERX14xx models, ERX7xx
models, and the ERX310 Broadband Services Router:
•
See ERX Module Guide, Table 1, Module Combinations for detailed module specifications.
•
See ERX Module Guide, Appendix A, Module Protocol Support for information about the
modules that support NAT.
For information about modules that support J-Flow on the E120 and E320 Broadband
Services Routers:
• See E120 and E320 Module Guide, Table 1, Modules and IOAs for detailed module
specifications.
•
See E120 and E320 Module Guide, Appendix A, IOA Protocol Support for information
about the modules that support J-Flow.
Before You Configure J-Flow Statistics
Before you configure J-Flow statistics, be sure you have created IP interfaces from which
J-Flow can extract traffic flow information. For information about configuring IP interfaces,
see
Configuring IP in JunosE IP, IPv6, and IGP Configuration Guide .
Configuring Flow-Based Statistics Collection
To configure J-Flow on a virtual router:
1.
Enable J-Flow statistics.
2.
Enable J-Flow statistics on the desired interfaces.
3.
(Optional) Define the sampling interval at which you want to collect statistics.
4.
(Optional) Customize the size of the main flow cache.
5.
(Optional) Define flow cache aging timers.
6.
(Optional) Specify to where you want to export J-Flow statistics.
Copyright © 2010, Juniper Networks, Inc. 94
JunosE 11.2.x IP Services Configuration Guide