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Juniper Networks® Field Guide and Reference by Juniper Networks®, Cris Morris, Gary Drenan, Aviva Garrett

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Configuring Traffic Sampling and Forwarding

On routers with an Internet Processor II ASIC, you can sample IP traffic based on particular input interfaces and various fields in the packet header. You can use traffic sampling to monitor any combination of specific logical interfaces, specific protocols on one or more interfaces, a range of addresses on a logical interface, or individual IP addresses. Information about the sampled packets is saved to files on the router's hard disk. The traffic sampling feature is not meant to capture all packets received by a router. Juniper Networks does not recommend excessive sampling (a rate greater than 1 in 1,000 packets), because it can increase the load on the processor. If you need to set a higher sampling ...

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