Director models are available with up to four 10-Gbps XFP ports
which can be used as network or monitor connections; and one or
two Director Network Modules (DNMs), each providing 6 in-line
links or 12 Span ports, supporting Gigabit SX Fiber or 10/100/1000
Copper media. All Director models include 10 1-Gbps SFP monitoring
ports for Fiber or Copper tools. A dedicated 10/100/1000
Management port, a local RS-232 CLI port, and dual redundant power
supply modules make Director easy to install, highly reliable, and
quick to deliver value.
Aggregation, Regeneration, and Switching:
Director provides one-to-one, many-to-one, one-to-many, and
many-to-many mappings of network links and Span ports to monitor
ports. In other words, traffic from any network links and Span
ports can be aggregated into a single stream and copied to any one
monitoring port; in addition, the same aggregated traffic stream
can be copied to more than one monitoring port at the same time,
enabling different groups to monitor the same data with conflicts.
Multiple different aggregations and regenerations can operate
simultaneously, without interfering with each other either
functionally or causing slow-downs. Director aggregates,
regenerates, switches, and filters traffic completely at line
speed, even for fully-utilized 10-Gbps ports.
High-speed, multi-protocol aggregated traffic streams can be
challenging for monitoring tools to handle. Often tools use
front-end pre-filters simply to strip off traffic-of-interest,
such as VoIP traffic for a VoIP performance analysis tool, while
discarding the rest of the packets. This simple-sounding operation
can consume a significant amount of a tool’s processing power
because it must handle every single packet on the wire.