Cisco ONS 15600 Reference Manual page 80

3.1 Optical Port Protection
Table 3-1
Type
1+1
Unprotected
Because there are no electrical cards in the ONS 15600, 1:1 or 1:N protection is not provided.
Note
Figure 3-1
Figure 3-1
Working OC-N
Cisco ONS 15600 Reference Manual, R6.0
3-2
Port Protection Types
Ports Description
Any optical Pairs a working optical port with a protect optical port. Protect ports
must match the line rate of the working ports. For example, Port 1 of an
OC-48 card can only be protected by another OC-48 port. Ports do not
need to be in adjoining slots. For maximum protection, provision the
ports/cards in Slots 1 to 4 as working and the ports/cards in Slots 11 to
14 as protect.
Any Unprotected ports can cause traffic loss if a port fails or incurs a signal
error. However, because no ports are reserved for protection,
unprotected schemes maximize the service available for use on the
ONS 15600.
Note
shows an example of the ONS 15600 in a maximum protection, 1+1 protected configuration.
ONS 15600 in a 1+1 Protected Configuration
TSC SSXC SSXC TSC
If you want to protect traffic you should implement either a path
protection or bidirectional line switched ring (BLSR) protection
scheme.
Protect OC-N
Chapter 3 Card Protection