Cisco Systems 8600 Series manual Service Interfaces, Statistical Alarms and Network Statistics

Network Management

The design of the BPX switch permits it to support network interfaces up to 622 Mbps in the current release while providing the architecture to support higher broadband network interfaces as the need arises.

Optional redundancy is on a one-to-one basis. The physical interface can operate either in a normal or looped clock mode. And as an option, the node synchronization can be obtained from the DS3 extracted clock for any selected network trunk.

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 ASI-1 card provides two T3 or E3 ports. The ASI-155 card OC3/STM-1 trunk interfaces are single-mode fiber (SMF), single-mode fiber long reach (SMF-LR), and multi-mode fiber (MMF) physical interfaces. 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 ASI and 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 OC3 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 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 StrataView Plus NMS, are a useful tool for monitoring network usage. Statistics collected on network operation fall into two 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 StrataView Plus workstation for logging and display. The link from the node to the Cisco StrataView Plus workstation uses a protocol to acknowledge receipt of each statistics data packet. Refer to the Cisco StrataView Plus 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.

1-18Cisco BPX 8600 Series Reference