Optical Bypass Functionality; Optical Bypass Module Connectivity; Cisco Sce8000 Installation And Configuration Guide, Rel - Cisco SCE8000 Installation And Configuration Manual

Chapter 2 Introduction to the Cisco SCE8000 Platform
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In a case where the Cisco SCE8000 platform must be replaced, it is possible to remove the bypass
modules from the SCE8000 chassis without disconnecting them from the network and then reinstall them
in the new SCE platform, so that traffic links are preserved even in a case of complete failure and
replacement of the Cisco SCE8000 platform. (See
Disrupting Traffic on the Link, page

Optical Bypass Functionality

The optical bypass module is connected bump-in-the-wire in the 10-GBE link. It is then connected to the
Cisco SCE8000 platform with two types of connections:
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Optical Bypass Module Connectivity

The optical bypass module functions as follows:
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Figure 2-7
OL-16478-03
During a power failure —The Cisco SCE8000 has two power supplies. A power failure occurs only
when both of them fail.
10GBE optical connections for data link traffic — 10 GBE connections from the optical bypass
module to one pair of the 10GBE SPA ports.
Control connection — Connection to the RJ-11 External Bypass connector on the SCE8000-SCM,
so the optical bypass is activated if the Cisco SCE8000 platform fails.
Under normal conditions, the bypass module directs traffic to flow via the Cisco SCE8000.
Under failure conditions, the optical bypass shortcuts the interfaces that are connected to the traffic
link, and all traffic flows through the optical bypass module, bypassing the SCE platform.
Optical Bypass Module Connectivity
Default bypass state (no power)
Non-default bypass state
OPB
3/0/0
3/2/0
SCE8000
OPB
Replacing the Optical Bypass Module without
9-27.)
3/1/0
3/3/0

Cisco SCE8000 Installation and Configuration Guide, Rel 3.1.7

The Cisco SCE8000 Optical Bypass
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