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Introduction: Broadcom NetXtreme™ 57XX User Guide
Functional Description
Features
Network Link and Activity Indication
Functional Description
The Broadcom Ethernet controller connects the computer to an Ethernet network.
The controller incorporates a technology that transfers data at a maximum
rate of 100 Mbit/s for Fast Ethernet controllers, or one gigabit per second
(10 times the rate of Fast Ethernet controllers) for Gigabit Ethernet controllers.
The Gigabit Ethernet controller targets the increased congestion
experienced at the backbone and server in today's networks and provides
a future upgrade path for high-end workstations that require more bandwidth
than the Fast Ethernet controller can provide.
Features
The following is a list of the Broadcom NetXtreme Gigabit Ethernet/Fast Ethernet
controller features for all supported operating systems:
- PCI Express x1 Lane Support (BCM5751, BCM5751m, BCM5721)
- Full ASF 1.0 Support (BCM5705, BCM5702)
- Full ASF 2.0 Support with Hardware Random Number Generator (BCM5751, BCM5751m,
BCM5721)
- Gigabit Ethernet (IEEE 802.3-1999) for Broadcom NetXtreme Gigabit Ethernet
controllers
- Fast Ethernet for Broadcom 57XX 10/100 Integrated controllers
- Logical Link Control (IEEE 802.2)
- Flow Control (IEEE 802.3x)
- Standard Ethernet frame size (1518 bytes)
- Layer 2 Priority Encoding (IEEE 802.1P)
- High-speed on-chip RISC processors (NOTE: Dual RISC processors are supported
only on the BCM5702 and BCM5704 devices.)
- Adaptive interrupt frequency
- Programmable rule checking and frame classification
- Up to 16 (4, if no external memory) classes of service (CoS)
- Up to 16 (4, if no external memory) Distribution Rings
- Integrated 96-KB frame buffer memory
- Jumbo frames (9 KB) (only for the BCM5702 device)
- GMI/MII Management Interface
- 16M external SSRAM address space
- Selectable memory protection for external (on-board) memory
- Statistics for SNMP MIB II, Ethernet-like MIB, and Ethernet MIB (IEEE 802.3z,
Clause 30)
- Four unique MAC unicast addresses
- Support for multicast addresses via 128-bit hashing hardware function
- Serial EEPROM and Flash Memory
- Supports PXE 2.1 specification (Linux Red Hat PXE Server, Windows 2000,
Windows Server 2003, Intel APITEST, DOS UNDI, Rembo Technology Auto-Deploy
Server, Windows NT 4.0 Remoteboot Server)
- JTAG support
- PCI Power Management Interface (v1.1)
- ACPI and Wake on LAN support
- 3.3V/1.8V CMOS with 5V-tolerant I/Os
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Network Link and Activity
Indication
The state of the network link and activity is indicated by appearance of the
LEDs on the RJ-45 connector (see Figure 1). The
network link and activity state indicated by the LEDs is described in Table 1.
Figure 1: RJ-45 Connector
Table 1. Network Link/Activity State
Indicated by LEDs
LED |
LED Appearance |
Network State |
Link LED |
Off |
No link (cable disconnected) |
Off |
10 Mbit/s link |
Yellow |
100 Mbit/s link |
Green |
1000 Mbit/s link |
Activity LED |
Off |
No network activity |
Blinking green |
Network activity |
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