BCM5338M
®
NINE-PORT MANAGED 10/100 SWITCH WITH IEEE 802.1/P/X/Q VLAN
FEATURES
•
Sixth-generation L2+ Fast Ethernet switch on a chip
•
The BCM5338M integrates:
•
Eight transceivers (IEEE 802.3u compliant)
•
Nine medium access controllers (MACs) (IEEE 802.3x
compliant)
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One port can be assigned as a WAN port
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256-KB memory for packet buffer and control
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Non-blocking switch fabric supports up to 24 ports
•
Cascades to 36 ports through a 3.2-Gbps expansion port
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Stack to 48 ports with a 200-Mbps turbo MII port
SUMMARY OF BENEFITS
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Enables a new generation of affordable 10/100 switches with
•
•
highest integration of enhanced L2+ features
Uses field-proven industry-standard 10BASE-T/100BASE-TX
(100BASE-FX compatible) Fast Ethernet transceivers—
lowering overall system interoperability and reliability risks
IEEE 802.1Q based VLAN and flexible priority queues
mapped to selectable protocols such as IEEE 802.1p, Diffserv,
ToS, and CoS, enable the switch to be designed to a wide
variety of applications for multimedia and data traffic
Supports port based Extensible Authentication Protocol over
LAN in four application modes; forwards only EAPOL frames
to the CPU for authentication and allows secure mode traffic
filtering
Supports IEEE 802.1ad aggregation/port trunking
•
•
IEEE 802.1p QoS packet classification with four priority
queues
•
IEEE 802.1Q based VLAN with 512 entries
•
Supports IEEE 802.1x EAPOL higher layer protocol
•
•
Per port storm control of broadcast, multicast, and unlearned
unicast traffic
•
Flexible per port ingress/egress rate control with minimum
resolution of 48 Kbps for better traffic management
•
MAC address locking enhances security control
•
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•
•
•
•
•
•
•
•
•
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•
•
•
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MAC based trunking with automatic link failover
Programmable per port storm control and rate control
Port protection allows traffic aggregation to assigned port
4K MAC addresses with automatic learning and aging
Per port programmable MAC address locking
Programmable per port flow control and back pressure
Buffer repeater mode
MII or reversed MII
MDC/MDIO and SPI interfaces
Port mirroring and IGMP layer2/3 snooping
MIB Autocast
®
function
DTE (power over Ethernet)
Hardware support for SNMP, RMON, and STP
Internal oscillator simplifies design and reduces cost
JTAG
3.3V and 1.8V, and typical power consumption is less than 2W
BCM5328M pin-to-pin compatible 208-pin MQFP package
•
MII port supports additional 100TX/FX
•
Optional reversed MII port connects directly to an IEEE 802.3
compliant MAC
•
Access to all internal registers through SPI or MDC/MDIO
interfaces
•
Low-cost management using the on-chip MIB registers allows
the collection and transmission of basic management statistics
for each port
•
Switch management features:
•
Low-cost MIB Autocast function
•
Hardware support for Simple Network Management Protocol
(SNMP), remote network monitoring (RMON), IEEE 802.1d
spanning tree protocol, IEEE 802.1s multiple spanning tree (up
to 32), and IEEE 802.1w rapid spanning tree protocol
OVERVIEW
Block Diagram
Auto MDI/MDIX
Auto MDI/MDIX
Auto MDI/MDIX
Auto MDI/MDIX
Auto MDI/MDIX
Auto MDI/MDIX
Auto MDI/MDIX
Auto MDI/MDIX
MII/Reversed MII Interface
Inter-Chip Expansion
CPU Interface
Internal
Osc.Circuit
SPI/CPU
Interface
10/100 PHY
MAC
MAC
MAC
MAC
MAC
MAC
MAC
MAC
MAC
10/100 PHY
MIB Registers
ARL Table
Switch Fabric
512 Tag IEEE 802.1Q
VLAN
Priority Map Register
IEEE 802.1p
DMA
Interface
256-KB Packet Buffer
LED
Interface
10/100 PHY
10/100 PHY
10/100 PHY
10/100 PHY
10/100 PHY
10/100 PHY
LEDs
The
BCM5338M
switch is a sixth-generation switch designed based on
the field-proven industry-leaders, the BCM5328 and BCM5328M
switches. This device combines all of the functions of a high-speed
switch system—including packet buffers, PHY transceivers, MACs,
address management, and a non-blocking switch fabric—into a single
0.18-micron CMOS device. The
BCM5338M
complies with IEEE
802.3, IEEE 802.3u, and IEEE 802.3x specifications, including the MAC
control PAUSE frame and auto-negotiation subsections, providing
compatibility with all industry-standard Ethernet and Fast Ethernet
devices.
The
BCM5338M
contains eight full-duplex 10BASE-T/100BASE-TX
Fast Ethernet transceivers, each of which performs all of the physical
layer interface functions for 10BASE-T Ethernet on Category 3, 4, or 5
Unshielded Twisted-Pair (UTP) cable and performs 100BASE-TX Fast
Ethernet functions on Category 5 UTP cable.
In addition to the robust 10/100 Ethernet DigiPHY™, MIB Autocast,
and management functions, the eight-port switch in the
BCM5338M
has
a rich feature set suitable for voice over IP and video and data traffic for
multimedia applications.
The four-level priority queues mapped to IEEE 802.1p, Diffserv, ToS,
and CoS, 512 entries IEEE 802.1Q VLAN, IEEE 802.1x EAPOL
protocol filtering, MAC based trunking with link fail-over, per-port
bandwidth/rate control, MAC address locking, IGMP snooping at
layer2/3, and port protection function, allow system vendors to build
advanced L2+ switch systems for the multitenant/multidweller unit
(MDU/MTU) markets.
The proprietary MIB Autocast function encapsulates the on-chip MIB
statistics and sends them out automatically on a predefined port (or ports)
at programmed intervals. The
BCM5338M
periodically transmits a legal
Ethernet frame on a designated port. The frames can be intercepted by an
external management probe or a dedicated network management
application resident on any node within the network. This function
requires only a small, low-cost microcontroller to initialize and
configure the device.
The
BCM5338M
provides an on-chip MIB statistics register to collect,
receive, and transmit statistics for each port. Additionally it provides
direct hardware support for the Ether-like MIB, Bridge MIB, MIB II
(interfaces) and the first four groups of the RMON MIB. All nine groups
of RMON can be supported by using additional capabilities, such as port
mirroring/snooping, together with an external microcontroller to process
some MIB attributes. The MIB registers can be accessed through the
serial management port by an external microcontroller.
Broadcom
®
, the pulse logo,
MIB Autocast
®
,
DigiPHY™,
and
Connecting everything
®
are trademarks
of Broadcom Corporation and/or its subsidiaries in the United States and certain other countries. All other
trademarks mentioned are the property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
5338M-PB01-R
04/21/04
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
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