168o08yy5q-ffjdne1h * Itibia Technologies Co Ltd
MARVELL CONFIDENTIAL, UNDER NDA# 12109049
168o08yy5q-ffjdne1h * Itibia Technologies Co Ltd
MARVELL CONFIDENTIAL, UNDER NDA# 12109049
168o08yy5q-ffjdne1h * Itibia Technologies Co Ltd * UNDER NDA# 12109049
MARVELL CONFIDENTIAL - UNAUTHORIZED DISTRIBUTION OR USE STRICTLY PROHIBITED
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®
88E6085
10 Port 10/100 Ethernet Switch with 8 Transceivers, QoS, and 802.1Q
Copyright © 2008 Marvell
CONFIDENTIAL
Doc. No. MV-S104212-00 Rev. B
January 30, 2008, Advance Document Classification: Proprietary Information Page 3
OVERVIEW
The Marvell
®
88E6085 device is a single chip inte-
grated 10-port Fast Ethernet switch. This device sup-
ports ‘Best-in-Class’ Quality of Service (QoS) and the
highest ‘real-world’ performance. It is uniquely
designed for SOHO router and gateway applications.
This device contains eight 10BASE-T/100BASE-TX
transceivers (PHYs) and two MII ports. The 88E6085
device is designed to work in all environments. True
Plug-and-Play is supported with Auto-Crossover,
Auto-Negotiation, and Auto-Polarity in the PHYs,
along with bridge loop prevention (using Port States).
The 88E6085 contains ten independent 802.3 media
access controllers (MACs), a high-speed, non-block-
ing four traffic class QoS switch fabric that uses the
unique patented Marvell Dynamic Queue Limit archi-
tecture. The QoS architecture switches packets into
one of four traffic class queues based upon Port, IEEE
802.1p, IPv4 Type of Service (TOS) or Differentiated
Services (Diff-Serv), IPv6 Traffic Class, 802.1Q VLAN
ID, DA MAC address or SA MAC address. The
devices also contain a high-performance address
lookup engine with support for up to 2K active nodes,
and a 1 Mbit frame buffer memory. Back-pressure and
Pause frame-based flow control schemes are included
to support zero packet loss under temporary traffic
congestion. The MAC units in the devices comply fully
with the applicable sections of IEEE 802.3.
The two MII interfaces support a direct connection to
Management or Router CPUs with integrated MACs.
Both interfaces support MII-PHY mode or MII-MAC
mode. These interfaces, along with BPDU handling for
IEEE 802.1D Spanning Tree Protocol, 802.1w Rapid
Spanning Tree, 802.1s Multiple VLAN Spanning Tree,
programmable per-port VLAN configurations, 802.1Q
and Port States, support fully managed switches and
truly isolated WAN vs. LAN firewall applications. The
device supports 64 802.1Q VLAN IDs which can be
enabled on a per port basis. Three levels of 802.1Q
security is supported with error frame trapping and log-
ging.
The 88E6085 supports multiple address databases
which allows packet routing without modification of the
MAC address. This allows the same MAC address to
exist multiple times in the MAC Address database with
multiple port mappings, to completely isolate the WAN
from the LAN database.
The integrated PHYs in the 88E6085 are designed
with the Marvell
®
cutting-edge mixed-signal process-
ing technology for digital implementation of adaptive
equalization and clock data recovery. Special power
management techniques are used to facilitate low
power dissipation and high port count integration. Both
the PHY and MAC units in the 88E6085 comply fully
with the applicable sections of IEEE 802.3, IEEE
802.3u, and IEEE 802.3x standards.
The device’s many operating modes can be config-
ured using SMI (serial management interface - MDC/
MDIO) and/or a low cost serial EEPROM, and/or by
special Remote Management ethernet frames. A stan-
dalone QoS mode is also supported.
HIGHLIGHTED FEATURES
• ‘Best-in-Class’ per port TCP/IP Ingress Rate Lim-
iting along with independent Storm Prevention
• Non-Rate Limited frames based on SA or DA
• Remote Management capabilities allow device
configuration and readback via Ethernet frames
• Per port, programmable MAC address limiting
• Quality of Service support with four traffic classes
• QoS determined by Port, IEEE 802.1p tagged
frames, IPv4’s Type of Service (TOS) & Differenti-
ated Services (DS), IPv6’s Traffic Class 802.1Q
VID, Destination MAC address, or Source MAC
address
• Frame priority overrides based on SA, DA, or VID
• Queue priority overrides based on SA, DA, VID,
ARP, or Snoop
• Strict, Weighted, or mixed mode QoS selectable
per port
• 802.1Q VLAN support for up to 64 VLAN IDs
• Supports multiple provider ports within a single
chip via a programmable Ethertype per port
• Enhanced 802.1s Per VLAN Spanning Tree sup-
porting up to 64 spanning tree instances
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