博通公司的BCM53118是八端口GbE交换器件,集成了高速交换系统所有的功能,包括8路全双工的10/100/1000BASE-T/TX以太网收发器,包缓冲器,媒体接入控制器(MAC),以及无阻塞的交换构造,以及和CPU或无线/DSL/线缆路由器芯片通信的GMII/RGMII/MII/RvMII接口,与IEEE 802.3™ 和IEEE 802.3x指标兼容,具有住宅网关和家庭办公交换的所有功能,能同时连接到语音,多媒体和数据.本文介绍了BCM53118的主要特性和优势以及方框图等性能.
BCM53118 9-Port GbE Switch with 8 Integrated 10/100/1000 PHYs
The BCM53118 is a highly integrated, cost-effective, gigabit switch. The switch design is based on the field-proven industry-leading BCM5398. The BCM53118 combines all the functions of a high-speed switch system, including eight full-duplex 10/100/1000BASE-T/TX Ethernet transceivers, packet buffer, Media Access Controllers (MACs), and a non-blocking switch fabric, into a single 65-nm LP CMOS device. In addition, the BCM53118 has one GMII/RGMII/MII/RvMII interface for a CPU or a wireless/DSL/cable router chip. It complies with the IEEE 802.3™ and IEEE 802.3x specifications, including the MAC control PAUSE frame, providing compatibility with all industrystandard Ethernet, Fast Ethernet, and Gigabit Ethernet (GbE) devices.
The BCM53118 is packed with features, including VLAN, VLAN double tagging, per port QoS, jumbo frame support, DOS prevent engine, per port rate control, and MIBs management. It also includes two Broadcom patented technologies, LoopDTech and CableChecker, that are designed to lower the human effort for troubleshooting cable problems and loops during installation and for post-installation support.
LoopDTech also eliminates the additional cost of hardware and software required to run Spanning Tree Protocol. CableChecker, unlike traditional TDR-based cable diagnostics, can detect cable and connector problems without disconnecting the cable from the other end. This allows CableChecker to run while the switch is passing packets. Network support personnel can monitor and troubleshoot network problems remotely, which is very important in an SMB environment, where IT resources are scarce. LoopDTech and CableChecker, when set up correctly, actually detect problems automatically without any human intervention.
The BCM53118 has all the features required to enable residential gateways and home office switches that can be connected to voice, multimedia, and data devices simultaneously. With per-port QoS/ queuing and rate control support, different packet types can be identified and prioritized within the switch, and voice packets can be assigned a higher priority for outbound delivery.
主要特性:
Highly integrated, non-blocking 9-port 10/100/1000 switch silicon that integrates:
Eight 10/100/1000 PHYs
One GMII/RGMII interface for an Inband Management Port (IMP) for glueless connection to a CPU/management entity
Serial EEPROM, MDC/MDIO, SPI, and Interrupt-to-CPU interfaces
Broadcom’s LoopDTech™ and CableChecker™ help reduce network downtime and minimize installation, maintenance, and support efforts
LoopDTech technology provides loop detection without running spanning tree protocol
CableChecker enables advanced cable diagnostics based on the Broadcom® Convergence Algorithm
Virtual Local-Area Network (VLAN)
IEEE 802.1Q-based VLAN with 4K entries
Port-based VLAN
VLAN double tagging (Q-in-Q)
Quality of Service (QoS)
Four selectable QoS per port; SP and WRR
Port, MAC, IEEE 802.1P, and IPv4/IPv6 DSCP based QoS
Performance
9 KB jumbo frame support; wirespeed performance for all fame sizes
4K MAC addresses with automatic learning and aging
256 multicast group support
196-KB packet buffer
Security
IEEE 802.1x support for secure user authentication
DoS prevention hardware
Traffic control and network resiliency
Storm control and port-based ingress/egress rate control
Spanning Tree support (Rapid Spanning Tree and Multiple Spanning Trees—up to 16)
IPv4 IGMP and IPv6 MLD snooping
IEEE 802.3x programmable per-port flow control and backpressure
Port mirroring, LLDP, LACP
Management
On-chip MIB counters to collect receive and transmit statistics for each port, hardware support for SNMP/MIBs and RMON
Technology and physical specifications
State-of-the-art 65 nm LP, 6-layer metal technology
1.2V core and 3.3V I/O
Typical power consumption less than 3.9W
主要优势:
Flexible solution enables cost-optimized board and system designs.
Additional interfaces enable efficient designs for branch office switch applications. Flexible CPU interface allows it to work with any CPU.
Broadcom-patented features provide unique solutions to network loop and cable problems. LoopDTech, without running STP, automatically detects loops, reducing system cost. CableChecker, unlike traditional TDR-based cable diagnostics, can be run at any time to detect cable length and problems without interrupting live traffic.
VLAN feature insures proper layer 2 isolation and security.
Double tagging enables private VLAN capability.
Supports all types of client connections, including VoIP, video, multimedia, and data. Priority can be assigned each traffic type to guarantee delivery of time-sensitive packets and efficient use of network bandwidth.
Provides a bigger bang for the buck (with line-rate and non-blocking performance in an SMB switch).
Highly integrated and scalable design supports large number of client connections, prolonging the life of the switch even as the number of users increases and, in turn, reducing the cost of network expansions.
Increases network security and blocks unwanted access.
Providess an easy way to troubleshoot security problems.
Enhances network security and resiliency to keep the network running efficiently. A network that is always available and rarely goes down enhances workplace efficiency and minimizes IT support costs.
Enables multicast switching with IGMP and MLD snooping without expensive L3 multicast routing.
QoS, VLAN, and rate control, coupled with security, make the BCM53118 one of the most powerful SMB switches to provide control over who is connected, the resources assigned to the users, and bandwidth management.
Can be managed remotely using SNMP or RMON. Build sophisticated applications on the switch with the fully featured, easy-to-use Broadcom SDK.
Leapfrogs one generation of process technology to provide the lowest power and lowest system cost solution in the industry.
图1.BCM53118方框图.
本文关键字：暂无联系方式电子技术，电工技术 - 电子技术
