Cisco BPX 8600 Series, Руководство по установке и настройке

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3-3
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 3 BPX Switch Common Core Components
Broadband Controller Card (BCCs)
The BCC-4V provides a 16 x 32 cross-point architecture that increases the peak switching capacity of
the BPX switch to 19.2 Gbps, with a sustained non-blocking throughput of 9.6 Gbps.
Features
The Broadband Controller Card performs these major system functions:
• Runs the system software for controlling, configuring, diagnosing, and monitoring the BPX switch.
• Contains the crosspoint switch matrix operating at 800 Mbps per serial link or up to 1600 Mbps
(BCC-4V).
•
Contains the arbiter which controls the polling each high-speed data port and grants the access to
the switch matrix for each port with data to transfer.
• Generates Stratum 3 system clocking and can synchronize it to either a selected trunk or an external
clock input.
• Communicates configuration and control information to all other cards in the same node over the
backplane communication bus.
•
Communicates with all other nodes in the network.
• Provides a communications processor for an Ethernet LAN port plus two low-speed data ports. The
BCC15-BC provides the physical interface for the BCC-32.
The BCC-3-BC provides the physical interface for the BCC-3-32M, BCC-3-64M, and BCC-4V.
Each Broadband Controller Card includes the following:
•
68EC040 processor operating at 33 MHz.
• 32 Mb or 64 MB option for BCC-4.
• 4 Mb of Flash EEPROM for downloading system software.
•
512 Kbytes of BRAM for storing configuration data.
• EPROM for firmware routines.
• 68302 Utility processor.
•
SAR engine processor operating at 33 MHz.
• Communication bus interface.
• HDLC processor for the LAN connection interface.
•
Two RS-232 serial port interfaces.
Functional Description
The BPX switch is a space switch. It employs a crosspoint switch for individual data lines to and from
each port. The switching fabric in each BPX switch consists of three elements for the BCCs (see
Figure 3-2):
• Central Arbiter on each BCC.
• Crosspoint Switch.
–
16 X 32 Crosspoint Switching Matrix on each BCC (2 X [12 X 12]) used for BCC-4V.
• Serial Interface and LAN Interface Modules on each BCC and on each Function Module.