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Chapter 3 System Features
PSAX System Software Features
3-36
255-700-447
PacketStar
®
PSAX 2300 Multiservice Media Gateway User Guide
, Issue 1
Release 9.0.0
Interface Protection
Group Feature
The Interface Protection Group feature provides the capability to configure
interface protection groups of ATM interfaces that support PVC and SPVC
connections on PSAX modules. Interface protection groups can be configured
as primary (active) and standby (idle). Similar types of interfaces must be
must be grouped together in the same group. For example, in a primary
(active) group, you could set up this group with all DS3 ATM UNI 3.0 having
the same parameters, and in the secondary (standby) group, you could set up
the same type of interfaces having the same parameters as in the primary
group. Specifically, this feature allows a user to group similar types of inter-
faces together by specifying which interfaces in the group are primary (nor-
mally carrying traffic) or standby (normally idle). The feature permits N:1,
1:1, and M:N schemes by allowing several primary interfaces and one
standby interface to exist with a user-defined interface protection group.
When a failure condition is detected on a primary interface, the feature
moves all affected connections from the primary interface to a standby inter-
face. The standby interface is selected from those available in the interface
protection group based on criteria selected by the user.
To use this feature, the following sequence of configuration tasks must be
performed:
1. Configuring the ports,channels, and interfaces on the modules (physical
layer interface)
2. Configuring connections (ATM layer and IWF)
3. Configuring the inteface protection groups
Figure 3-7 illustrates how a typical interface protection group configuration
works. After the protection groups are created, they are displayed on the Pro-
tection Group Table and the Interface Protection Table windows on the con-
sole interface. When a switchover is initiated by the primary interface, the
IWF for that interface is torn down and replaced by the standby interface’s
IWF within that group. These configurations are displayed on the appropriate
PVC connection screen.