Cisco SCE 8000 Installation And Configuration Manual page 58

External Optical Bypass
Under normal operating conditions, traffic flows through the link as usual, with the exception that the
optical bypass module sits on the link (see
Figure 3-9
Subscriber 1
Subscriber 2
If the Cisco SCE 8000 platform fails, traffic flows through the optical bypass module, bypassing the SCE
8000, so that traffic on the link is maintained (see
Figure 3-10
Subscriber 1
Subscriber 2
In cascade configuration, installation of the optical bypass module is highly recommended.
Note
This optical bypass module can be added to link without altering the basic characteristics of the
topology. (The installation procedure and the actual connections are somewhat different when the optical
bypass module is used, see
For more information about the external bypass module, see
section on page
Cisco SCE8000 GBE Installation and Configuration Guide
3-12
Optical Bypass Under Normal Operating Conditions
OPB
3/0/0 3/1/0
3/2/0 3/3/0
OPB
Optical Bypass Under Failure Conditions
OPB
3/0/0 3/1/0
3/2/0 3/3/0
OPB
"Optical Bypass Module Connectivity" section on page
2-12.
Chapter 3 Cisco SCE 8000 Topology and Topology-Related Parameters
Figure 3-9).
Network 1
Network 2
Figure 3-10).
Network 1
Network 2
"The Cisco SCE 8000 Optical Bypass"
6-9.)