External Optical Bypass - Cisco SCE8000 Configuration Manual

External Optical Bypass

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From the SCE(config if)# prompt, type link mode all-links (forwarding|bypass|cutoff) and press
Step 1
Enter.

External Optical Bypass

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The Cisco SCE8000 supports connection to up to two external optical bypass devices. These protect the
line against power failure or total hardware failure, which prevents the hardware card from bypassing
the traffic. Each external optical device protects a single traffic link passing through the SCE platform.
The main objective of the external bypass is to provide automatic redundancy and failover support.
However, the user can also manually enable the external bypass, assuming it is connected.
At power failure the external bypass is automatically activated. The external bypass can also be
controlled by the software and by hardware in case of software failure.
In case of power failure, the bypass shortcuts the interfaces that are connected to the two sides of the
Cisco SCE8000, bypassing all the traffic, as illustrated in
The SCE8000 can detect the presence of each external optical bypass device, and warns the user by
various means (CLI show command, system operational-state, SNMP traps) if an expected external
bypass device is not detected as present.
Cisco SCE8000 Software Configuration Guide, Rel 3.1.6S
7-4
Link mode is relevant only to inline topologies.
The default link mode is forwarding.
When other link modes are selected, active service control is not available and any service control
configuration will not be applicable.
How to Activate the External Bypass, page 7-5
How to Deactivate the External Bypass, page 7-5
How to Set the External Bypass to the Default State, page 7-5
How to Display the State of the External Bypass, page 7-6
Chapter 7 Configuring the Connection
Figure 7-1.
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