Beta Draft Confidential
7-321/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring Trunks
Configuring APS Trunk Backup and Fast APS 1+1 for ATM Direct Trunks
8. Enter the Protection Slot number and Protection Port number.
9. In the Direction field, select Bidirectional from the pull-down menu.
10. If necessary, select each of the remaining tabs and complete the fields in each tab.
For detailed descriptions of the fields and tabs in this dialog box, see the Switch
Module Configuration Guide for the CBX 3500, CBX 500, GX 550, and B-STDX
9000.
11. Choose OK to save the PPort APS settings and close the Modify PPort dialog box.
12. In the Navigational panel, expand the class node of the working PPort (of the APS
pair).
13. Right-click on the LPorts class node and select Add. The Add Logical Port dialog
box appears (Figure 3-5 on page 3-8).
14. In the LPort Type field, select ATM Direct Trunk from the pull-down menu.
15. Use the instructions in “Setting Logical Port Attributes” on page 3-14 to complete
the fields in the tabs on the Add Logical Port dialog box.
16. When you finish, choose OK to save the logical port configuration for the working
port.
17. (APS Trunk Backup only) To configure an ATM Direct Trunk logical port for the
protection port, repeat step 1 through step 16.
18. In the navigation panel, select the switch on which the second working/protection
port pair resides and perform one of the following steps:
a. For APS Trunk Backup, complete step 2 though step 16 (beginning on
page 7-29) to define ATM Direct Trunk logical ports for the second APS pair.
b. For Fast APS 1+1, complete step 2 though step 11 (beginning on page 7-29)
to define an ATM Direct Trunk logical port for the second APS working
physical port.
19. Continue with the following section to define the APS direct trunks for APS trunk
backup or Fast APS 1+1.
Note – Unidirectional APS is the default directional mode and is supported only by
Fast APS 1+1 over PNNI on either a GX OC-3c/STM-1 or a GX OC-12c/STM-4
module connected to a BIO1 module. Bidirectional mode must be selected so that
ATM Direct Trunk can be selected as the logical port type.
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