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Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2
78-19417-01
Chapter 7 Circuits and Tunnels
Circuit Properties
• Assign different circuit sizes.
• Automatically or manually route circuits.
• Automatically create multiple circuits with autoranging. VC low-order path tunnels do not use
autoranging.
• Provide full protection to the circuit path.
• Provide only protected sources and destinations for circuits.
• Define a secondary circuit source or destination that allows you to interoperate an ONS 15310-MA
SDH Linear Multiplex Section Protection configuration with third-party equipment Linear
Multiplex Section Protection configurations.
• Set Linear Multiplex Section Protection circuits as revertive or nonrevertive.
For the ONS 15310-MA SDH CE-100T-8, CE-MR-6 (ONS 15310-MA SDH only), or ML-100T-8 cards,
you can provision circuits either before or after the cards are installed if the slots are provisioned. For
the 15310-MA SDH 15310E-CTX-K9 card, you must preprovision the small form-factor pluggables
(SFPs) (called pluggable port modules [PPMs] in CTC) before you can create an optical circuit.
However, circuits do not carry traffic until the cards and SFPs are installed and the ports are In-Service
and Normal (unlocked-enabled); Out-of-Service and Autonomous, Automatic In-Service
(OO-AU,Automatic In Service); or Out-of-Service and Management, Maintenance
(locked-enabled,maintenance).
7.2 Circuit Properties
You can view information about circuits in the ONS 15310-MA SDH Circuits window, which appears in
network, node, and card view. The Circuits window shows the following information:
• Name—The name of the circuit. The circuit name can be manually assigned or automatically
generated.
• Type—The circuit types are: VC high-order path (VC high-order path circuit), VC low-order path
(VC low-order path circuit), LOP Tunnel (VC low-order path tunnel), LAP (VC low-order path
aggregation point), HOP-V (VC virtual concatenated [VCAT] circuit), or VC low-order path-V (VC
low-order path VCAT circuit).
• Size—The circuit size. VC low-order path circuits are VC12 and VC3. ONS 15310-MA SDH VC
high-order path circuits are VC4, VC4-2c, VC4-3c, or VC4-4c, VC4-8c, and VC4-16c. VCAT
circuits are VC-12-nv or VC3-nv, where n is the number of members.
• Protection—The type of circuit protection.
• Direction—The circuit direction, either two-way or one-way.
• Status—The circuit status. See the “7.2.1 Circuit Status” section on page 7-3.
• Source—The circuit source in the format: node/slot/port “port name”/VC. (Port name appears in
quotes.) Node and slot always appear; port “port name”/VC might appear, depending on the source
card, circuit type, and whether a name is assigned to the port. If the port uses a pluggable port
module (PPM), the port format is PPM-port number, for example, p2-1. If the port is a E1, DS3, or
E3 port, port type is indicated, for example, pE1. If the circuit size is a concatenated size (3c, 6c,
9c, 12c), VCs used in the circuit are indicated by an ellipsis, for example, S7..9, (VCs 7, 8, and 9)
or S10..12 (VCs 10, 11, and 12).
• Destination—The circuit destination in the same format as the circuit source.
• # of Spans—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.