The IP1818 is a non-blocking, store-and-forward architecture switch controller, which supports 16-port SS-SMII, 1 Port RGMII/SERDES combo, 1 port RGMII, and one-port MII for a 16+2G smart switch application. With built-in SERDES transceiver, the IP1818 provides a very cost-effective solution for a 16+2 Gigabit fiber without external Gigabit Ethernet transceivers.
 

Note: In the following paragraphs, 16-port SS-SMII is referred to as port 0 ~ port 15, 2-port RGMII as port 16 (or Giga 1) and port 17 (or Giga 2) and MII port as port 18. These ports are named as P0 ~ P18 in abbreviation. The PHY address for P0 ~ P15 are “8~23” respectively. The PHY addresses “1” and “2” correspond to P16 and P17 respectively.
 

The IP1818 embeds a 2.75Mb SSRAM for the use of packet buffer and 4K MAC address table. It provides a 2-wire CPU interface, which allows the user to access to the register. The system configuration can be downloaded from EEPROM upon reset. The serial LED information is provided through a 2-wire LED interface, simplifying the PCB layout task for LED display. With the external logic devices, the IP1818 can show the status of link, speed, duplex and activity.
 

In addition to the fundamental function such as the flow control, the broadcast storm control and the programmable MAC address aging time, the IP1818 also supports many advanced features that allow the user to implement the smart switch features. The IGMP (Internet Group Management Protocol) snooping provides a method to build a multicast link without complicated CPU code. The user can also use the 2 levels of priority queue to support the real-time streaming application. Supporting both port based and tag based VLAN, the IP1818 can partition the network traffic by programming the VLAN table. Furthermore the IP1818 supports both non-VID related tag based VLAN and VID related tag based VLAN. The access control based on the MAC layer, the IP layer and TCP/UDP layer provides a method for the user to implement the Class of Service and the network security.
 

An 8051 CPU based web controller can easily support the web management. With the web management function, users can remotely configure and monitor IP1818 smart switches through browsers, such as Microsoft Internet Explorer or Chrome and no program installation is required for the smart switch management.