Cisco Systems SCE8000 - page 45

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Cisco SCE8000 Installation and Configuration Guide, Rel 3.1.7
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Chapter 3 Cisco SCE8000 Topology and Topology-Related Parameters
Topology-Related Parameters
Topology-Related Parameters
Refer to the following sections to determine the correct values for all topology-relate d parameters before
beginning to run the initial setup of the Cisco SCE8000.
• Connection Mode Parameter, page 3-11
• Physically Connected Links Parameter, page 3-12
• Priority, page 3-12
• On-Failure Mode Parameter, page 3-12
There are four topology-related parameters:
• Connection mode — Can be any one of the following, depending on the physical installation of the
Cisco SCE8000 (Refer to Connection Mode Parameter, page 3-11):
– Inline — single Cisco SCE8000 inline
– Receive-only — single Cisco SCE8000 receive-only
– Inline-cascade — two inline Cisco SCE8000 platforms cascaded
– Receive-only-cascade — two receive-only Cisco SCE8000 platforms cascaded
• Physically-connected-links — In cascaded configurations, this parameter defines the number of the
link connected to the Cisco SCE8000 platform being configured. (Refer to Physically Connected
Links Parameter, page 3-12.)
It is applicable only in a cascade topology.
• Priority — This parameter defines which is the primary Cisco SC E8000 (Refer to Priority,
page 3-12.)
It is applicable only in a cascade topology
• On-failure — This parameter determines whether the system cuts the traffic or bypasses it when the
Cisco SCE8000 either has failed or is booting. Traffic bypass can be achieved either throu gh the
external optical bypass device or through the internal bypass mechanism of the SPA interface
processor. It is not applicable to receive-only topologies. (Refer to On-Failure Mode Parameter,
page 3-12.)
These parameters are configured via the connection-mode command.
Connection Mode Parameter
The connection mode parameter refers directly to the phy sical topology in which the Cisco SCE8000 is
installed. The connection mode depends on two factors:
• Inline/Receive-only:
– Inline — The Cisco SCE8000 resides on the data link between the subscriber side and the
network side, thus both receiving and transmitting packets.
– Receive-only — The Cisco SCE8000 does not reside physically on the data link. Data is
forwarded to the Cisco SCE8000 via an external optical splitter. The Cisco SCE8000 itself
receives only and does not transmit.
• Cascade — Indicates a two Cisco SCE8000 topology where the two Cisco SCE8000 platforms are
connected via the cascade ports.