Beta Draft Confidential
7-361/19/05 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
Configuring Fast APS 1+1 for PNNI Links
This section describes the prerequisite tasks you must perform before you configure
GX 550 ATM NNI logical ports for Fast APS 1+1.
Before You Begin
In order to use Fast APS 1+1 on a GX 550 PNNI link , you need to configure PNNI
node parameters for each switch that supports PNNI in the network. See Chapter 21,
“Configuring PNNI Routing” for more information on enabling the PNNI routing
protocol.
In addition, verify that you have completed the following configurations described in
the Switch Module Configuration Guide
for CBX 3500, CBX 500, GX 550, and
B-STDX 9000
:
• Selected Fast APS 1+1 as the physical port redundancy option. For more
information about this option, see “APS Options” on page 7-6.
• Configured one working port on the GX 550 Multiservice WAN switch and one
working port on the other device.
• Configured one protection port on the GX 550 Multiservice WAN switch and one
protection port on the other device.
Defining ATM NNI Logical Ports for PNNI Links
The steps in this section describe how to configure ATM NNI logical ports on GX 550
switches defined as PNNI links for Fast APS 1+1. You must configure each working
physical port on the GX 550 with an ATM NNI logical port (including PNNI
parameters). (The protection port is automatically configured with the logical port
settings that you define on the working port.) If a working port fails, SVCs and SPVCs
traversing the link are preserved and diverted to the protection port. See “About APS”
on page 7-6 for more information.
To create an NNI logical port for each GX 550 working and protection port:
1. Open the object tree for the GX 550 switch on which the first working/protection
port pair resides. (You will define an NNI logical port for the working physical
port.)
a. In the Network object tree, expand the instance node for the network that
contains the switch (see Figure 3-3 on page 3-4).
b. Expand the Switches class node and double-click on the instance node for the
switch.
The switch object tree appears in the Navigation Panel (see Figure 3-4 on
page 3-5).
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