Circuit Status; Table 7-2 Ons 15600 Circuit Status - Cisco ONS 15600 Reference Manual

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.
column.
Table 7-2
Status
CREATING
DISCOVERED
DELETING
PARTIAL
DISCOVERED_TL1
PARTIAL_TL1
CONVERSION_PENDING
Cisco ONS 15600 Reference Manual, R6.0
7-6
ONS 15600 Circuit Status
Table 7-2 shows the statuses that can appear in the Status
Definition/Activity
CTC is creating a circuit.
CTC created a circuit. All components are in place and a
complete path exists from circuit source to destination.
CTC is deleting a circuit.
A CTC-created circuit is missing a connection or circuit
span (network link), a complete path from source to
destination(s) does not exist, or a MAC address change
occurred on one of the circuit nodes and the circuit is in need
of repair (in the ONS 15454, the MAC address resides on the
AIP; in the ONS 15600, the MAC address resides on the
backplane EEPROM).
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.
A TL1-created circuit or a TL1-like, CTC-created circuit is
complete. A complete path from source to destination(s)
exists.
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.
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 Chapter 8, "SONET Topologies and
Upgrades."
Chapter 7 Circuits and Tunnels