Description

The MDS105 is a fully integrated 5 port Ethernet switch designed to support the low-cost requirements of unmanaged switch applications. The MDS105 provides features that are normally not associated with plug-andplay technology, while not requiring an external processor to facilitate their utilization.

Features

• 4 10/100 Mbps auto-negotiating RMII ports

• 1 10/100 Mbps auto-negotiating MII/serial port (Port 4) that can be used as a WAN uplink or as a 5th port

• External I2C EEPROM for power-up configuration

- Default mode allows operation without external EEPROM

• Up to 4 port-based VLANs

• Full wire-speed layer 2 switching on all ports (up to 1.448 M packets per second)

• Internal 1 k MAC address table

- Auto address learning

- Auto address aging

• Leading edge QoS capabilities provided based on 802.1p and IP TOS/DS field

- 2 queues per output port

- Packet scheduling based on Weighted RoundRobin (WRR) and Weighted Random Early Detection/Drop (WRED)

- Without flow control can drop packets during congestion using WRED

- 2 levels of packet drop provided

• Supports both Full/Half duplex ports

• Supports external parallel port for configuration updates

• Port 3 can be used to mirror traffic from the other 3 ports (0-2)

• Provides port-based prioritization of packets on up to 2 ports (0-1)

- Input ports are defined to be high or low priority

- Allows explicit identification of IP Phone ports

• Ports 0 & 1 can be trunked to provide a 200 Mbps link to another switch or server

• Utilizes a single low-cost external Pipelined, SyncBurst SRAM (SBRAM) for buffer memory

- 256 k bytes or 512 k bytes (1 chip)

• Flow Control capabilities

- Provides back pressure for half duplex

- 802.3x flow control for full duplex

• Special power-saving mode for inactive ports

• Ability to support WinSock2.0 and Windows2000 smart applications

• Transmit delay control capabilities

- Provides maximum delay guarantee (<1 ms)

- Supports mixed voice-data networks

• Optimized pin-out for easy board layout