Datasheet

11-8
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 11 Circuits and Tunnels
11.2.4 Circuit Protection Types
• Partial is appended to the Locked circuit service state when circuit cross-connects state are mixed
and not all in the Unlocked-enabled service state. The Locked-partial state can occur during
automatic or manual transitions between states. The Locked-partial service state can appear during
a manual transition caused by an abnormal event such as a CTC crash or communication error, or if
one of the cross-connects could not be changed. Refer to the Cisco ONS 15454 SDH
Troubleshooting Guide for troubleshooting procedures. The Locked-partial circuit state does not
apply to OCHNC circuit types.
You can assign a state to circuit cross-connects at two points:
• During circuit creation, you can set the state on the Create Circuit wizard.
• After circuit creation, you can change a circuit state in the Edit Circuit window or from the
Tools > Circuits > Set Circuit State menu.
Note After you have created an initial circuit in a CTC session, the subsequent circuit states default to the
circuit state of the initial circuit, regardless of which nodes in the network the circuits traverse or the
node.ckt.state default setting.
During circuit creation, you can apply a service state to the drop ports in a circuit; however, CTC does
not apply a requested state other than Unlocked-enabled to drop ports if:
• The port is a timing source.
• The port is provisioned for orderwire or tunnel orderwire.
• The port is provisioned as a RS-DCC, MS-DCC, or DCC tunnel.
• The port supports 1+1 or multiplex section-shared protection ring (MS-SPRing).
Circuits do not use the soak timer, but ports do. The soak period is the amount of time that the port
remains in the Unlocked-disabled,automaticInService service state after a signal is continuously
received. When the cross-connects in a circuit are in the Unlocked-disabled,automaticInService service
state, the ONS 15454 SDH monitors the cross-connects for an error-free signal. It changes the state of
the circuit from Locked to Unlocked or to Locked-partial as each cross-connect assigned to the circuit
path is completed. This allows you to provision a circuit using TL1, verify its path continuity, and
prepare the port to go into service when it receives an error-free signal for the time specified in the port
soak timer.
To find the remaining port soak time, choose the Maintenance > AINS Soak tabs in card view and click
the Retrieve button. If the port is in the Unlocked-disabled,automaticInService state and has a good
signal, the Time Until IS column shows the soak count down status. If the port is
Unlocked-disabled,automaticInService and has a bad signal, the Time Until IS column indicates that the
signal is bad. You must click the Retrieve button to obtain the latest time value.
For more information about cross-connect states, see Appendix B, “Administrative and Service States.”
11.2.4 Circuit Protection Types
The Protection column in the Circuit window shows the card (line) and SDH topology (path) protection
used for the entire circuit path. Table 11-3 shows the protection type indicators that appear in this
column.