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Cisco ONS 15454 Reference Manual, R8.5.x
78-18106-01
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 In-Service and Normal (IS-NR) service state, the circuit
service state is In-Service (IS).
PARTIAL A CTC-created circuit is missing a cross-connect or network sp an, a
complete path from source to destinations does not exist, or an alarm
interface panel (AIP) change occurred on one of the ci rcuit 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 sessio n
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 appe ar 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 destinations exists.
PARTIAL_TL1 A TL1-created circuit or a TL1-like, CTC-created circui t is missing a
cross-connect or circuit span (network link), and a complete path from
source to destinations does not exist.
CONVERSION_PENDING An existing circuit in a topology upgrade is set to this state. The circuit
returns to the DISCOVERED state once the topology upgrade is
complete. For more information about topology upgrades, see
Chapter 12, “SONET 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 a topology upgrade fails. Fo r more
information about topology upgrades, see Chapter 12, “SONET
Topologies and Upgrades.”
DROP_PENDING A circuit is set to this status when a new circuit drop is being added.
ROLL_PENDING A circuit roll is awaiting completion or cancellation.
Table 11-2 ONS 15454 Circuit Status (continued)
Status Definition/Activity