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
If the network reaches full utilization, ForeSight detects this and quickly acts to reduce the extra
bandwidth allocated to the active PVCs. ForeSight reacts quickly to network loading in order to prevent
dropped packets. Periodically, each node automatically measures the delay experienced along a Frame
Relay PVC. This delay factor is used in calculating the ForeSight algorithm.
With basic Frame Relay service, only a single rate parameter can be specified for each PVC. With
ForeSight, the virtual circuit rate can be specified based on a minimum, maximum, and initial
transmission rate for more flexibility in defining the Frame Relay circuits.
ForeSight provides effective congestion management for PVC's traversing broadband ATM as well.
ForeSight operates at the cell-relay level that lies below the Frame Relay services provided by the IGX
switch. With the queue sizes utilized in the BPX switch, the bandwidth savings is approximately the
same as experienced with lower speed trunks. When the cost of these lines is considered, the savings
offered by ForeSight can be significant.
Network Management
BPX switches provide one high-speed and two low-speed data interfaces for data collection and
network management:
• High-speed interface
An Ethernet 802.3 LAN interface port is provided for communicating with a Cisco WAN Manager
NMS workstation. TCP/IP provides the transport and network layer, Logical Link Control 1 is the
protocol across the Ethernet port.
• Low-speed interfaces
Two RS-232 ports are provided: one for a network printer and the second for either a modem
connection or a connection to an external control terminal. These low-speed interfaces are the same
as provided by the IGX switch.
Each BPX switch can be configured to use optional low-speed modems for inward access by the Cisco
Technical Response Team for network troubleshooting assistance or to autodial Customer Service to
report alarms remotely. If desired, another option is remote monitoring or control of customer premise
equipment through a window on the Cisco WAN Manager workstation.
A Cisco WAN Manager NMS workstation connects via the Ethernet to the LAN port on the BPX and
provides network management via SNMP. Statistics are collected by Cisco WAN Manager using the
TFTP protocol.
You can also use the Cisco WAN Manager’s Connection Manager to manage:
•
Frame Relay connections on IGX switch shelves
• Frame Relay and ATM connections on MGX 8220 shelves
• MGX 8220 shelf configuration.
Network Management software includes these applications:
• Cisco WAN Manager (formerly StrataView Plus)
A single unified management platform utilizing HP OpenView® to manage BPX, IGX, and SES
devices.
• StrataSphere BILLder
Monitors traffic flow over a network and captures data per standard or customized billing periods
and formats.