Datasheet

11-7
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 11 Circuits and Tunnels
11.2.3 Circuit States
11.2.3 Circuit States
The circuit service state is an aggregate of the cross-connect states within the circuit.
• If all cross-connects in a circuit are in the Unlocked-enabled service state, the circuit service state
is Unlocked.
• If all cross-connects in a circuit are in a Locked state (such as Locked-enabled,maintenance;
Unlocked-disabled,automaticInService; or Locked-enabled,disabled service state) or the
Unlocked-disabled,automaticInService state, the circuit service state is Locked.
PARTIAL A CTC-created circuit is missing a cross-connect or network span, a
complete path from source to destination(s) does not exist, or an alarm
interface panel (AIP) change occurred on one of the circuit nodes and
the circuit is in need of repair. (AIPs store the node MAC address.)
In CTC, circuits are represented using cross-connects and network
spans. If a network span is missing from a circuit, the circuit status is
PARTIAL. However, a PARTIAL status does not necessarily mean a
circuit traffic failure has occurred, because traffic might flow on a
protect path.
Network spans are in one of two states: up or down. On CTC circuit
and network maps, up spans appear as green lines, and down spans
appear as gray lines. If a failure occurs on a network span during a
CTC session, the span remains on the network map but its color
changes to gray to indicate that the span is down. If you restart your
CTC session while the failure is active, the new CTC session cannot
discover the span and its span line does not appear on the network map.
Subsequently, circuits routed on a network span that goes down appear
as DISCOVERED during the current CTC session, but appear as
PARTIAL to users who log in after the span failure.
DISCOVERED_TL1 A TL1-created circuit or a TL1-like, CTC-created circuit is complete.
A complete path from source to destination(s) exists.
PARTIAL_TL1 A TL1-created circuit or a TL1-like, CTC-created circuit is missing a
cross-connect or circuit span (network link), and a complete path from
source to destination does not exist.
CONVERSION_PENDING An existing circuit in a topology upgrade is set to this status. The
circuit returns to the DISCOVERED status when the in-service
topology upgrade is complete. For more information about in-service
topology upgrades, see Chapter 12, “SDH Topologies and Upgrades.”
PENDING_MERGE Any new circuits created to represent an alternate path in a topology
upgrade are set to this status to indicate that it is a temporary circuit.
These circuits can be deleted if an in-service topology upgrade fails.
For more information about in-service topology upgrades, see
Chapter 12, “SDH Topologies and Upgrades.”
DROP_PENDING A circuit is set to this status when a new circuit drop is being added.
Table 11-2 ONS 15454 SDH Circuit Status (continued)
Status Definition/Activity