Collection Port And Filtering Options - Extreme Networks PoS Installation And User Manual

Network
planning
Figure 3-10: NetFlow Collection Architecture Example

Collection Port and Filtering Options

By default, each PoS port maintains statistics for all the flows traversing the SONET link
in both the ingress and egress directions. However, generalized filtering options exist
that enable a port to maintain statistics only for ingress flows, only for egress flows, or
only for selected ingress and/or egress flows.
You can use these filtering options to configure a PoS port to maintain statistics
selectively for only those flows that match a specified filter. Up to 16 filters are
supported for each PoS port: eight filters for ingress flows; eight filters for egress flows.
The filters consist of a {value,mask} pair for each of the following flow components:
destination IP address, source IP address, destination port, source port, and protocol.
Conceptually, the filters work by logically ANDing the contents of each of these five
Packet Over SONET Module Installation and User Guide
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