Beta Draft Confidential
1-61/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Overview
PNNI
PNNI
Chapter 21 describes how to configure the ATM Private Network-to-Network
Interface (PNNI) routing protocol in your Lucent network. Table 21-1 on page 21-2
lists the supported PNNI features included in this release.
PNNI is a standard designed by the ATM Forum. This standard defines both an ATM
routing protocol and an ATM signaling protocol. Lucent supports PNNI on the CBX
3500, CBX 500, and GX 550 switch platforms. For a detailed explanation of PNNI
routing, 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.
CAC
Appendix A describes how to tune the Lucent Call Master Connection Admission
Control (CAC) to achieve a desired cell loss ratio objective across all physical ports in
your network. The Lucent CAC is responsible for the bandwidth allocation on all
ATM cards on the CBX 3500, CBX 500, GX 550, and B-STDX 9000. It is also
responsible for bandwidth allocation on all frame cards with the priority frame
capability.
ATM Traffic Descriptors
Appendix B describes how each traffic descriptor combination affects the cell streams
under different traffic conditions. When you create either a PVC or a PMP circuit, you
select one of several traffic descriptor combinations. The traffic descriptor
combination specifies which traffic parameters are used for traffic control. It also
determines the number and type of cells that are admitted into a congested queue, and
whether or not high-priority cells are tagged as low-priority cells when traffic exceeds
the traffic parameter thresholds.
CBX 500 Shared SP Threads
Appendix C provides information on shared switch processor (SP) threads. CBX 500
chassis slots 3-4, 5-6, 7-8, 9-1, 10-2, 11-12, 13-14, and 15-16 are associated with the
SP threads. This means that if you have an input/output module (IOM) installed in
slots 3 and 4, you are “sharing” an SP thread. If you have an IOM in slot 9 or 10, you
are sharing a thread with the SP itself. In this case, there are no thread limitations; the
IOM has the full 599.040 Mbps of bandwidth available.
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