Card Protection; Optical Port Protection; Table 3-1 Port Protection Types - Cisco ONS 15600 Reference Manual

Card Protection

This chapter explains the Cisco ONS 15600 SDH card protection configurations.
Chapter topics include:
•
•
•

3.1 Optical Port Protection

When you set up protection for ONS 15600 SDH cards, you must choose between maximum protection
and maximum port availability. The highest protection reduces the number of available ports; the highest
port availability reduces the protection.
Table 3-1
Type
1+1
Unprotected
Because there are no electrical cards in the ONS 15600 SDH, 1:1 and 1:N protection is not provided.
Note
Figure 3-1
78-18400-01
3.1 Optical Port Protection, page 3-1
3.2 Unprotected Ports, page 3-2
3.3 External Switching Commands, page 3-3
Port Protection Types
Ports
Any optical Pairs a working optical port with a protect optical port. Protect ports
Any
shows an example of the ONS 15600 SDH in a maximum, 1+1 protected configuration.
C H A P T E R
Table 3-1 contrasts port protection with an unprotected scheme.
Description
must match the line rate of the working ports. For example, Port 1 of an
STM-16 card can only be protected by another STM-16 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.
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 SDH.
If you want to protect traffic you should implement either a
Note
subnetwork connection protection ring (SNCP) or a
multiplex-section shared protection ring (MS-SPRing)
protection scheme.
Cisco ONS 15600 SDH Reference Manual, Release 9.0
3
3-1