Beta Draft Confidential
21-14
1/19/05
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring PNNI Routing
PNNI Signaling Overview
UBR Load Balancing Over Parallel PNNI Links
When the UBR service class is supported in a network, load balancing distributes
UBR calls equally over parallel PNNI links between the same two switches. You can
disable this feature by assigning different administrative weights to the parallel links.
For information about the UBR service class, see
PNNI Signaling Overview
This section provides a brief overview of PNNI signaling. For a detailed explanation
of PNNI signaling, see the ATM Forum Technical Committee Private
Network-Network Interface Specification Version 1.0 (af-pnni-0055.000), available
from the ATM Forum’s Web site:
http://www.atmforum.com
.
PNNI signaling allows ATM SVC and soft permanent virtual circuit (SPVC) calls to
be set up across a private network that supports the PNNI protocol.
Lucent ATM PVCs can be established over a PNNI routing domain as well as over a
routing domain that supports both VNN ATM and PNNI.
PNNI signaling is based on a subset of User-to-Network Interface (UNI) 4.0 signaling.
Note – In the current release, PNNI signaling is supported for ATM Point-to-Point
and Point-to-Multipoint (PMP) SVCs and ATM Point-to-Point SPVCs (offnet circuits)
only.
Summary of Contents for CBX 3500
Page 888: ......