Chapter 7 Circuits and Tunnels

Circuit Properties

State—The circuit state. See the “7.2.2 Circuit States” section on page 7-4.

The Filter button allows you to filter the circuits in network, node, or card view based on circuit name, size, type, direction, and other attributes. In addition, you can export the Circuit window data in HTML, comma-separated values (CSV), or tab-separated values (TSV) format using the Export command from the File menu.

7.2.1 Circuit Status

The circuit statuses that appear in the Circuit window Status column are generated by Cisco Transport Controller (CTC) based on conditions along the circuit path. Table 7-1shows the statuses that can appear in the Status column.

Table 7-1 ONS 15310-MA 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 cross-connect or network span 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 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 circuit 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 status. The circuit

 

returns to the DISCOVERED status when the topology upgrade is

 

complete. For more information about in-service topology upgrades, see

 

Chapter 9, “SDH Topologies and Upgrades.”

 

 

Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2

 

78-19417-01

7-3

 

 

 

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Cisco Systems 15310-MA manual Circuit Status, Status Definition/Activity

15310-MA specifications

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