Circuits
The Circuits tab displays information about network circuits including specific low-order circuits and tunnels, high-order circuits, virtual concatenated (VCAT) circuits, aggregation points, and dense wavelength division multiplexing (DWDM) optical channel network connections (OCHNCs), optical channel client connections (OCHCCs), and optical channel trails (OCH trails). Not all circuit can be created on all platforms.
Circuit information includes status, state, source and destination node, slot, and port. You can view the Circuits tab in all views. The Scope field expands or decreases the scope of the circuits shown, for example, in card view you can change the scope to node or network so that you can view all node or network circuits.
 
Item
Description
Circuit Name
Displays the name of the circuit. The circuit name can be manually assigned or automatically generated.
Type
For the ONS 15454 SDH, circuit types are HOP (high-order path circuit), LOP (low-order path circuit), VCT (VC low-order tunnel), VCA (VC low-order aggregation point), HOP_v (high-order VCAT circuit), and LOP_v (low-order VCAT circuit).
For the ONS 15600 SDH, the circuit type is HOP (high-order path circuit). LOP (low-order path circuit) is supported only when the ONS 15600 SDH is a pass-through node.
For DWDM circuits, circuit types are OCHNC, OCHNC DCN, OCHCC, and OCHTRAIL.
Size
For the ONS 15454 SDH, the circuit sizes for low-order circuits are VC11 (with XC-VXC-10G card only), VC12, and VC3. High-order circuit sizes are VC4, VC4-3c, VC4-4c, VC4-6c, VC4-8c, VC4-16c, and VC4-64c. OCHNC sizes are Equipped not specific, Multi-rate, 2.5 Gbps No FEC (forward error correction), 2.5 Gbps FEC, 10 Gbps No FEC, and 10 Gbps FEC. High-order VCAT circuits are VC4-nv and VC4-4c-nv and low-order VCAT circuits are VC3-nv, where n is the number of members.
For the ONS 15600 SDH, the high-order circuit sizes are circuit size are VC3, VC4, VC4-4c, VC4-8c, VC4-16c, or VC4-64c. ASAP optical ports also allow circuit sizes of VC4-2c and VC4-3c.
OCHNC, OCHCC, and OCH trail sizes are Equipped not specific, Multi-rate, 2.5 Gbps No FEC, 2.5 Gbps FEC, 10 Gbps No FEC, and 10 Gbps FEC.
OCHNC Wlen
(DWDM circuits only) Displays the OCHNC wavelength.
Dir
Displays the circuit direction, either two-way or one-way.
OCHNC Dir
(DWDM circuits only) The line direction of the OCHNC, OCHCC, or OCH trail, either Side B to Side A or Side A to Side B. If the direction is Side A to Side B, the channel exits from the node through the LINE-TX port of the Side B OSC-CSM, OPT-BST-E, OPT-BST-E, or OPT-AMP-17-C card, named the Side B Side Card by Cisco Transport Planner (typically these cards are hosted in Slot 17). If the direction is Side B to Side A, the channel exits from the node through the LINE-TX port of the Side A OSC-CSM, or OPT-BST, OPT-BST-E, or OPT-AMP-17-C card, named the Side A Side Card by Cisco Transport Planner (typically these cards are hosted in Slot 1).
Protection
Displays the type of circuit protection. See Circuit Protection Types for descriptions.
Status
Displays the circuit status. See Circuit Statuses for descriptions.
Source
Displays the circuit source in the format: node/slot/port port name/virtual container/tributary unit group. (The port name appears in quotes.) Node and slot always appear; port “port name”/virtual container/tributary unit group might appear, depending on the source card, circuit type, and whether a name is assigned to the port. If the IEEE 802.17 Resilient Packet Ring (RPR) mode is enabled, the port will appear as pRPR East or pRPR West.
If the circuit is a concatenated size (VC4-2c, VC4-4c, VC4-8c, etc.), VCs used in the circuit are indicated by an ellipsis, for example, VC4-7..9 (VCs 7, 8, and 9) or VC4-10..12 (VC 10, 11, and 12). Note the following:
If the port is on an ONS 15600 SDH ASAP card, the circuit source contains information about the pluggable interface module (PIM) and pluggable port module (PPM), in the format PIM-PPM-port_number.
If the port is on an ONS 15454 SDH MRC-N card, the port format is PPM-port_number.
Destination
Displays the circuit destination in same format as the circuit source.
# of VLANs
Displays the number of VLANs used by an Ethernet circuit.
# of Spans
Displays the number of internode links that constitute the circuit. Right-clicking the column displays a shortcut menu from which you can choose to show or hide circuit span detail. If Span Details is checked, the column name changes to “Spans.” This column displays all circuit span information.
State
Displays the circuit state. See Circuit States and Circuit Creation for descriptions.
Loopback
Identifies whether or not a port on the circuit is in loopback.
Create
Displays the Circuit Creation wizard to create a new circuit.
Edit
Displays the Edit Circuits dialog box to edit the circuit highlighted in the Circuits table.
Delete
Deletes the circuits highlighted in the Circuits table. Do not delete more than 28 circuits at a time.
Filter
Displays the Circuit Filter dialog box to filter the display of circuits on the Circuits tab.
Search
Displays the Search dialog box to search for circuits based on specific search criteria.
Scope
In node view, choose Network to display network circuits. In card view, choose Node to display node circuits or Network to display all network circuits.
Turns the filter on or off. CTC retains that last filter activation setting. For example, if you turn the filter on and then log out, CTC keeps the filter active the next time you log in.
Help
Displays context-sensitive help.

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