AR8327 AR8327N 7port Low-power Managed/Layer3 Gigabit Switch

AR8327 AR8327N – 7-port Low-power Managed/Layer3 Gigabit Switch with Hardware NAT

Source: http://www.qca.qualcomm.com/media/product/product_102_file1.pdf


Solution Highlights

• One GMII or two RGMII MAC interfaces
• Single SERDES/SGMII Interface
• 5 integrated 10/100/1000Base-T PHYs with integrated termination for the MDI interface
• Supports IEEE 802.3az standard
• Atheros ETHOS-Designed Green Ethernet (EDGE™) power saving modes
• QoS support with four traffic classes based on port, IEE802.1p, IPV4 TOS, IPV6 TC and MAC addresses
• Full VLAN support including QinQ and VLAN tag insertion and removal, with IVL and SVL
• VLAN translation and mapping
• Line rate hardware NAT (AR8327N)
• Hardware IGMP V1/2/3 and MLD V1/2 snooping, join and fast leave
• 96 Custom ACLs and rule based counters
• Ingress and Egress rate limiting and bandwidth control
• Broadcast storm suppression


AR8327 Product Overview

The AR8327 is the latest in high performance small network switching. It is
ultra low power, has extensive routing and data management functions and
includes hardware NAT functionality (AR8327N).

The AR8327/AR8327N is a highly integrated seven-port Gigabit Ethernet
switch with a fully non-blocking switch fabric, a high-performance lookup
unit supporting 2048 MAC addresses, and a four-traffic class Quality of Service
(QoS) engine. The AR8327 has the flexibility to support various networking
applications. The AR8327/AR8327N is designed for cost-sensitive switch
applications in wireless AP routers, home gateways, and xDSL/cable modem platforms.

The AR8327/AR8327N complies with 10Base-T, 100Base-T and 1000Base-T
specifications, including the MAC control, pause frame, and auto-negotiation,
providing compatibility with all industry-standard Fast Ethernet and Gigabit
Ethernet networks. The AR8327/AR8327N device contains five full-duplex
10/100/100Base-T transceivers and 10/100Base-T that can run at half
duplex, 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 100Base-T Fast/Gigabit Ethernet on Category 5 UTP cable. The
remaining 2 ports feature a standard GMII/RGMII/MII/Serdes interface to
allow connection to a host CPU in PON/xDSL/Cable/Wifi/Fiber routers.

The MACs on the AR8327/AR8327N support Jumbo Frames to reduce overhead
on the link for more efficiency. SPI or EEPROM interfaces provide easy
programming of the on-chip 802.1p QoS and/or DiffServ/TOS allowing switch
traffic to be given different classes of priority or service - for example, voice
traffic for IP phone applications, video traffic for multimedia applications,
or data traffic. Up to 4k virtual LANs (VLANs) can be set up via the SPI port
for separation of different users or groups on the network. ACL features can
reduce CPU effort for VLAN/QOS/DSCP/forward mapping and remapping based
on Layer1 to Layer4 information. 16 PPPoE header add/removal can increase
video QOS and offload the CPU. Hardware IGMP V1/V2/V3 is an innovation
for IPTV service. Atheros low-power can increase energy efficiency for
no link or idle states.

The 8327N supports line rate NAT (Network Address Translation) offloading
the processor and improving throughput.


AR8327 Specifications

• 10/100/1000Base-T IEEE 802.3 compliant
• Supports 1000Base-T PCS and auto-negotiation with next page support
• GMII/RGMII/MII/Serdes connections to MAC devices and SFPs
• Supports additional IEEE 1000Base-X and 100Base-FX with Integrated Serdes
• RGMII timing modes support internal delay and external delay on both Rx and Tx paths
• Atheros ETHOS-Designed Green Ethernet (EDGE) power saving modes with internal automatic DSP power saving scheme
• Supports IEEE 802.3az (Energy Efficient Ethernet)
• Supports Wake-on-LAN (WoL) to detect magic packet and notify the sleeping system to wake up
• Fully integrated digital adaptive equalizers, echo cancellers, and near end crosstalk (NEXT) cancellers
• All-digital baseline wander correction
• Automatic channel swap (ACS)
• Automatic MDI/MDIX crossover
• Automatic polarity correction
• IEEE 802.3u compliant Auto-Negotiation
• Jumbo Frame support up to 9KB (full duplex)
• Software programmable LED modes
• Multiple loopback modes for diagnostics
• 96 ACL rules for traffic shaping and routing
• Supports 16 PPPoE sessions with hardware header removal
• 802.1D spanning tree support
• Ingress and Egress rate limiting
• Broadcast storm suppression
• Port mirroring
• IEEE 802.3x Flow control for full duplex and and back pressure for half duplex
• Hardware loop detection
• Single power supply: 3.3V, optional for external regulator for core voltage
• Atheros Cable Diagnostic Test (CDT) Technologies
• IEEE 802.3 remote fault indication and fault propagation in fiber mode


AR8327N Reference Design Highlights

• Support five Gigabit TP, Extra Two RGMII MAC.
• Serdes/SGMII Interface for Active Fiber connection.
• Console UART interface to control chip setting.