Cisco BPX 8600 Series, Руководство по установке и настройке

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Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 1 The BPX Switch: Functional Overview
Network Management
Service Interfaces
Service interfaces connect ATM customer equipment to the BPX switch. ATM User-to-Network
Interfaces (UNI) and ATM Network-to-Network Interfaces (NNI) terminate on the ATM Service
Interface (ASI) cards and on BXM T3/E3, OC-3, and OC-12 cards configured for as service interfaces
(UNI access mode).
The BXM T3/E3 card supports the standard T3/E3 interfaces.
The BXM-155 cards support SMF, SMFLR, and MMF physical interfaces.
The BXM-622 cards support SMF and SMFLR physical interfaces.
The BXM cards support cell relay connections that are compliant with both the physical layer and ATM
layer standards.
The MGX 8220 interfaces to a BNI or BXM card on the BPX, via a T3, E3, or OC-3 interface. The
MGX 8220 provides a concentrator for T1 or E1 Frame Relay and ATM connections to the BPX switch
with the ability to apply Optimized Bandwidth Management (ForeSight) across a connection from
end-to-end. The MGX 8220 also supports CES and FUNI (Frame Based UNI over ATM) connections.
Statistical Alarms and Network Statistics
The BPX Switch system manager can configure alarm thresholds for all statistical type error conditions.
Thresholds are configurable for conditions such as frame errors, out of frame, bipolar errors, dropped
cells, and cell header errors. When an alarm threshold is exceeded, the NMS screen displays an alarm
message.
Graphical displays of collected statistics information, a feature of the Cisco WAN Manager NMS, are
a useful tool for monitoring network usage. Statistics collected on network operation fall into four
general categories:
• Node statistics
•
Network trunk statistics
• Network Service, line statistics
• Network Service, port statistics
These statistics are collected in real-time throughout the network and forwarded to the WAN Manager
workstation for logging and display. The link from the node to the Cisco WAN Manager workstation
uses a protocol to acknowledge receipt of each statistics data packet.
Refer to the Cisco WAN Manager Operations publication, for more details on statistics and statistical
alarms.
Node Synchronization
A BPX Service switch network provides network-wide, intelligent clock synchronization. It uses a
fault-tolerant network synchronization architecture recommended for Integrated Services Digital
Network (ISDN). The BPX switch internal clock operates as a Stratum 3 clock per ANSI T1.101.
Because the BPX switch is designed to be part of a larger communications network, it is capable of
synchronizing to higher-level network clocks as well as providing synchronization to lower-level
devices. You can configure any network access input to synchronize the node. Any external T1 or E1
input can also be configured to synchronize network timing.