Juniper IP SERVICES - CONFIGURATION GUIDE V 11.1.X, Configuration Manual

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Operation with NAT
When functioning with Network Address Translation (NAT), J-Flow sampling occurs
before NAT applies any translation.
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.
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Platform Considerations
JUNOSe 11.1.x IP Services Configuration Guide