Cisco ONS 15454 SDH E1-75 매뉴얼 - 페이지 9
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Chapter 11 Circuits and Tunnels
11.2.4 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.
column.
Table 11-3
Protection Type
1+1
2F MS-SPRing
4F MS-SPRing
2F-PCA
4F-PCA
DRI
MS-SPRing
N/A
PCA
Protected
SNCP
SPLITTER
Unknown
Unprot (black)
Unprot (red)
Y-Cable
11.2.5 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:
•
•
78-18119-01
Circuit Protection Types
Description
The circuit is protected by a 1+1 protection group.
The circuit is protected by a two-fiber MS-SPRing.
The circuit is protected by a four-fiber MS-SPRing.
The circuit is routed on a protection channel access (PCA) path on a two-fiber
MS-SPRing; PCA circuits are unprotected.
The circuit is routed on a PCA path on a four-fiber MS-SPRing; PCA circuits are
unprotected.
The circuit is protected by a dual-ring interconnection.
The circuit is protected by both a two-fiber and a four-fiber MS-SPRing.
A circuit with connections on the same node is not protected.
The circuit is routed on a PCA path on both two-fiber and four-fiber MS-SPRings;
PCA circuits are unprotected.
The circuit is protected by diverse SDH topologies, for example, an MS-SPRing and
an SNCP, or an SNCP and a 1+1 protection group.
The circuit is protected by an SNCP.
The circuit is protected by the protect transponder (TXPP_MR_2.5G) splitter
protection. For splitter information, refer to the Cisco ONS 15454 DWDM
Installation and Operations Guide.
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.
A circuit with a source and destination on different nodes is not protected.
A circuit created as a fully protected circuit is no longer protected due to a system
change, such as removal of a MS-SPRing or 1+1 protection group.
The circuit is protected by a transponder or muxponder card Y-cable protection
group. For more information, refer to the Cisco ONS 15454 DWDM Installation and
Operations Guide.
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
"11.5 Multiple Destinations for Unidirectional Circuits" section on page
Table 11-3
shows the protection type indicators that appear in this
Cisco ONS 15454 SDH Reference Manual, R8.5
11.2.4 Circuit Protection Types
11-14.
11-9