7-8
Cisco ONS 15600 SDH Reference Manual, Release 9.0
78-18400-01
Chapter 7 Circuits and Tunnels
7.2.4 Circuit Protection Types
To find the remaining port soak time, choose the Maintenance > AINS Soak tabs in card view and click
the Retrieve button. If the port is in the Unlocked-disabled,automaticInService state and has a good
signal, the Time Until IS column shows the soak count-down status. If the port is
Unlocked-disabled,automaticInService and has a bad signal, the Time Until IS column indicates that the
signal is bad. You must click the Retrieve button to obtain the latest time value.
For more information about cross-connect states, see
Appendix B, “Administrative and Service States.”
7.2.4 Circuit Protection Types
The Protection column in the Circuit window shows the card (line) and SDH topology (path) protection
used for the entire circuit path.
lists the protection type indicators that you will see in this
column.
7.2.5 Circuit Information in the Edit Circuit Window
You can edit a selected circuit using the Edit button on the Circuits window. The tabs that appear depend
on the circuit chosen:
•
General—Displays general circuit information and allows you to edit the circuit name.
•
Drops—Allows you to add a drop to a unidirectional circuit. For more information, see the
“7.5 Multiple Destinations for Unidirectional Circuits” section on page 7-12
•
SNCP Selectors—Allows you to change SNCP selectors. For more information, see the
Circuits” section on page 7-12
.
•
SNCP Switch Counts—Allows you to change SNCP switch protection paths. For more information,
see the
“7.6 SNCP Circuits” section on page 7-12
Table 7-3
Circuit Protection Types
Protection Type
Description
1+1
The circuit is protected by a 1+1 protection group.
2F MS-SPRing
The circuit is protected by a two-fiber MS-SPRing.
2F-PCA
The circuit is routed on a protection channel access (PCA) path on a two-fiber
MS-SPRing. PCA circuits are unprotected.
DRI
The circuit is protected by dual-ring interconnect (DRI).
N/A
A circuit with connections on the same node is not protected.
Protected
The circuit is protected by diverse SDH topologies, for example, an MS-SPRing and
an SNCP, or an SNCP and 1+1.
Unknown
A circuit has a source and destination on different nodes and communication is
down between the nodes. This protection type appears if not all circuit components
are known.
Unprot (black)
A circuit with a source and destination on different nodes is not protected.
Unprot (red)
A circuit created as a fully protected circuit is no longer protected due to a system
change, such as removal of an MS-SPRing or 1+1 protection group.
SNCP
The circuit is protected by an SNCP.
