Circuit Protection Types
The following table describes the protection types that can appear on the Circuits tab.
 
Protection Type
Description
1+1
The circuit is protected by a 1+1 protection group.
2F BLSR
(ONS 15454 and ONS 15600 only) The circuit is protected by a 2-fiber bidirectional line switched ring (BLSR).
4F BLSR
(ONS 15454 and ONS 15600 only) The circuit is protected by a 4-fiber BLSR.
BLSR
(ONS 15454 and ONS 15600 only) The circuit is protected by both a 2-fiber and a 4-fiber BLSR.
DRI
(ONS 15454 and ONS 15600 only) The circuit is protected by a dual-ring interconnect (DRI).
N/A
A circuit with connections on the same node is not protected.
None
Circuit protection is not applicable.
Protected
The circuit is protected by diverse SONET topologies, for example, a BLSR and a unidirectional path switched ring (UPSR) or a UPSR and 1+1.
2F-PCA
(ONS 15454 and ONS 15600 only) The circuit is routed on a protection channel access (PCA) path on a 2-fiber BLSR. PCA circuits are unprotected.
4F-PCA
(ONS 15454 and ONS 15600 only) The circuit is routed on a PCA path on a 4-fiber BLSR. PCA circuits are unprotected.
PCA
(ONS 15454 and ONS 15600 only) The circuit is routed on a PCA path on both 2-fiber and 4-fiber BLSRs. PCA circuits are unprotected.
SPLITTER
(ONS 15454 only) The circuit source and destination are on MXPP_MR_2.5G and TXPP_MR_2.5G cards. These cards provides splitter (line-level) protection.
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 a BLSR or 1+1 protection group. This protection type is not applicable to DWDM.
UPSR
The circuit is protected by a UPSR.
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.
Y-CABLE
(ONS 15454 only) The circuit is protected by a transponder or muxponder card in a Y-cable protection group.

Copyright © 2002-2011, Cisco Systems, Inc. All rights reserved.