Chapter 3 Topology
Functionality
Cisco SCE 1000 2xGBE Installation and Configuration Guide
OL-7821-05
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•
Forwarding —
This is the normal operational mode, in which the
SCE 1000
processes the
traffic for monitoring and control purposes.
•
Sniffing —
The bypass mechanism preserves the network link, while in parallel allowing the
SCE 1000
to process the traffic for monitoring only.
•
Cutoff —
There is no forwarding of traffic, and the physical link is forced down (cutoff
functionality at layer 1).
Functionality
The
SCE 1000
can serve one of two general functions:
•
Monitoring and Control — The
SCE 1000
monitors and controls traffic flow. Decisions are
enforced by the
SCE 1000
depending on the results of the monitoring functions of the
SCE
1000
and the configuration of the Service Control Application for Broadband or Mobile
solution.
In order to perform control functions, the
SCE 1000
must be physically installed as an inline
installation and the connection mode must be “inline”.
•
Monitoring only — The
SCE 1000
monitors traffic flow, but cannot control it.
Either an inline installation or an optical splitter installation may be used for monitoring only.
In the latter case connection mode must be “receive-only”.
Physical Installation
There are two options for the physical installation configuration of the
SCE 1000
Platform:
•
Inline installation (provides control functionality).
•
Out-of-line installation utilizing an external optical splitte
The physical installation determines the connection mode that should be configured.
