Create GMPLS circuits

GMPLS (Generalized Multiprotocol Label Switching) is an extension of the MPLS signaling protocols to enable easy setup/restoration for use in Optical Transport Network (OTN) and Synchronous Digital Hierarchy (SDH).

NOTE: GMPLS is supported for OTN only for this release.

There are four Service Types or classes in GMPLS namely:

Service_1: It is an unprotected service. The service will have dedicated work path only. In case of failure in traffic flow path, the traffic will go down. The cross-connects will be retained and once the fault is rectified, the traffic will be restored.
Service_1_R: It provides 1+1 protection and a GMPLS based restoration. The service will have two types of protection defined namely revertive and non-revertive with protection time of less than 50 microseconds and restoration time greater than 50 microseconds and less than 300 microseconds.
- Revertive: Silver service (revertive) will have dedicated work path. In case of failure in work path, the traffic switches to protect path. The cross-connects will be retained in the work path permanently. Reroute path is found after the failure in work path. The traffic will switch back to the work path when it is restored. The reroute path will be deleted when the traffic switches back to the work path.
- Non-revertive: Silver service (non-revertive) will have dedicated work and protection path. In case of failure in work path, the traffic switches to protect path but the cross-connects will be deleted from the work path permanently. The protect path is traced through reroute. The traffic will not switch back to the work path when it is restored.
Service_1_1_R: It provides 1+1 protection and a GMPLS based restoration. This service will have dedicated work and protection path. In case of failure in the work path, the traffic switches to protect path. The cross-connects will be retained in the work path permanently. In case of any failure in the protect path, the traffic will switch to either the reroute path (if the original work path is not restored) or the original work path (if the work path is restored).
Service_1_1_F: It provides a permanent 1+1 protection. This service will have dedicated work and protection path. In case of any failure in the work path the traffic switches to protect path and a new work path named "rerouted work path" will be created. In case of protect path failure, a new protect path with the name "rerouted protect path" will be created. Switching time is less than 50 microseconds. For every failure in the work/protect path, one more work/protect path will be created.

Perform the following steps to create OTN GMPLS circuit:

Go to Configuration > Layer 1 > Create Circuit menu and click P2P/MEP Circuit option. Create Circuit page is displayed.
Enter the options for Common Circuit Info, Source Info. For more information, refer table Attributes of Create Circuit - OTN GMPLS.
1. To select the time slot, click M. The available and unavailable time slot information will be displayed. Manual and Auto time slot selection, both options are available on this window.
2. Do one of the following for selecting the time slots:
  > Manually: Under CHANNELS, click the desired channel number(s) and click Add Channel. The channels(s) will be displayed under Selected CHANNELS. Click Apply.
  
  > Automatically: Click Auto button. Depending on the Capacity, the required number of channels will automatically get listed under Selected CHANNELS. Click Apply.
3. The selected channel(s) will now be displayed in TimeSlot field on Create Circuit window.
4. If user desires to add protection to the source port, click Add source client port protection link and select the Port and TimeSlot as done in Step 2a to 2c.
Under Destination Info section, enter value for the desired parameters referring table Attributes of Create Circuit - OTN GMPLS. Refer Step 2 for selecting the time slot.
Click Start Route Creation. The Create Circuit page is displayed.
Click Expand.
Select the Create Circuit option if you want to create circuit only in TJ5500 database and the circuit will be in planned state in TJ5500. Or select the Create & Activate option, the lambda connection if you want to provision on the node as well as the TJ5500.

Attributes of Create Circuit - OTN GMPLS

Attribute	Description

Create Circuit
Circuit Type	Select the type of circuit as 'P2P'.
Sub Type	Select the sub type of circuit as 'OTN Circuit'.
Restoration Scheme	Select the check box to enable GMPLS.
Circuit name	Enter the name of circuit.
Customer	Enter the name of the customer. The drop-down list will be displayed after entering the character in the field. If the drop-down list does not display any customer names, the user can create customer by clicking on the C link available against this field. The Create Customer page is displayed. Refer to the Manage Customers section for further details.
Capacity	Select the capacity from the drop down menu: ODU0 ODU1 ODU2 ODU2E ODU1F ODU4 ODUflex NOTE: 'ODUflex' option is not supported for GMPLS circuit.
Direction	The direction is always Bi (Bi-directional).
Time slot selection	By default 'Manual' option will be selected. This parameter is not configurable.
Higher Order	Check this box if higher order circuit has to be created. This parameter is not configurable. NOTE: Single Node Higher Order circuit can be discovered in the NMS by enabling the singleton support.
Enabe CST	This parameter is not configurable.
Class Of Service	Select the class of Service from the drop down menu. Service_1 Service_1_R Service_1_1_R Service_1_1_F
Disjointness	Disjointness is to ensure no element is common to mitigate the risks. It is supported in 1_1_R and 1_1_F class of services. Select the option from following: Link Node SRLG
Disjointness Degree	Disjointness degree is parameter to allow load sharing on the links. Maximal: The degree can be up to 50% and configured on node. Full: The degree utilizes two distinct links.
Priority	Assign the priority to the circuit if multiple services are traversing on the link. Highest priority is 0 and lowest is 7. On fiber cut, highest priority services are rerouted first.
Auto Planned	Select the check box to select the path automatically, after entering the source and destination information.
TL Bandwidth Calculation	Select the check box to view the bandwidth on the Topological links, displayed after Route creation.
Source Information
SrcTrafficType	By default 'OTN' option will be selected. This parameter is not configurable.
Node	Enter the source node name. On entering a letter, the list pertaining to that letter will be displayed. NOTE: On selecting the option IP, you can enter the IP instead of the node name.
Port	Select the desired port from drop down menu.
Time slot	Click M (Select TimeSlots) to select the time slot on the desired port.
NOTE: The Add source client port protection option enables you to protect the source port.
Destination Information
DestTrafficType	By default 'OTN' option will be selected. This parameter is not configurable.
Node	Enter the destination node name. On entering a letter, the list pertaining to that letter will be displayed. NOTE: On selecting the option IP, you can enter the IP instead of the node name.
Port	Select the desired port drop down menu.
Time slot	Click M (Select TimeSlots) to select the time slot on the desired port.
NOTE: The Add destination client port Protection option enables you to protect the destination port.