1-18 Cisco BPX 8600 Series Reference
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.
