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Cisco ONS 15600 SDH Reference Manual, Release 9.0
78-18400-01
Chapter 7 Circuits and Tunnels
7.2.2 Circuit Status
7.2.2 Circuit Status
The circuit statuses that appear in the Circuit window Status column are generated by CTC based on an
assessment of conditions along the circuit path.
shows the statuses that can appear in the Status
column.
Table 7-2
ONS 15600 SDH Circuit Status
Status
Definition/Activity
CREATING
CTC is creating a circuit.
DISCOVERED
CTC created a circuit. All components are in place and a
complete path exists from circuit source to destination.
DELETING
CTC is deleting a circuit.
PARTIAL
A CTC-created circuit is missing a connection or circuit
span (network link), or a complete path from source to
destination(s) does not exist.
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 Transaction Language One (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(s) does not exist.
CONVERSION_PENDING
An existing circuit in a topology upgrade is set to this state.
The circuit returns to the DISCOVERED state when the
topology upgrade is complete. For more information about
topology upgrades, see
