Creating ASON Trail Groups

An ASON trail group is often used with the link capacity adjustment scheme (LCAS). The LCAS dynamically adjusts the number of virtual containers required for service mapping to meet the requirements of various service bandwidths. This elevates the bandwidth utilization and enhances the robustness of virtual concatenation.

Prerequisites

The ASON trail must be created.

Background Information

An ASON trail group associates the member trails that belong to the same LCAS service to an LSP group, and add, delete and modify these member trails in the ASON network. To enable virtual concatenation services to have an enhanced fault tolerance capability, separate the member trails whenever possible.

Each ASON trail group has an ID, which is the unique ID assigned by an ASON NE. The member trails in the ASON trail group have the same source and sink, but the trails are separated whenever possible. You can create an ASON trail group at the initial node only.

Service Requirement

See Figure 1. Create a GE service between NE1 and NE3, bind four VC4s to the service. Configure an EGT2 board each slot 4 of NE1 and NE3.

Figure 1 ASON trail group service requirement

Board Configuration

For the board configuration of NE1 and NE3, refer to Figure 2.

Figure 2 Board configuration of NE1 and NE3

For the board configuration of NE2 and NE4, refer to Figure 3.

Figure 3 Board configuration of NE2 and NE4

Service Planning

Refer to Table 1 for GE service planning.

**Table 1** GE service planning
Attribute	NE1<->NE3
Source NE	NE1
Source board-port	4-EGT2-1
Source timeslot	VC4-1 to VC4-4
Source VCTRUNK	VCTRUNK1
Bound bandwidth	4 x VC4
LCAS	Start
Sink NE	NE3
Sink board-port	4-EGT2-1
Sink timeslot	VC4-1 to VC4-4
Sink VCTRUNK	VCTRUNK1
ASON trail group	The group ID is 1
Member trail	Four silver services from NE1-EGT2 to NE3-EGT2

Procedure

In the , right-click NE1 and choose NE Explorer from the shortcut menu.
Select 4-EGT2 and set the interface parameters according to Table 1.
In the , right-click NE3 and choose NE Explorer from the shortcut menu.
Select 4-EGT2 and set the interface parameters according to Table 1.
Select four silver services from NE1-4-EGT2 to NE3-4-EGT2.
In the NE Explorer, select NE1 and choose ASON > ASON Trail Group from the Function Tree.
Click Create, and enter the ID and name of the ASON trail group. Click Apply.
Select the created ASON trail group and click Add.
Select the four created silver services and click OK.