> # Specifying Filters

> You can perform VSAN-based filtering to selectively monitor network traffic on specified VSANs. You can apply this VSAN filter to all sources in a session . Only VSANs present in the filter are spanned.

> You can specify session VSAN filters that are applied to all sources in the specified session. These filters are bidirectional and apply to all sources configured in the session. Each SPAN session represents an association of one destination with a set of source(s) along with various other parameters that you specify to monitor the network traffic.

> Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.