General Description :

The IP 1826C is a non-blocking, store-and-forward architecture switch controller, which supports 24-port SS-SMII, 2-port RGMII/ SERDES, and one-port MII for a 24+ 2G smart switch application. With two built-in SERDES transceiver, The IP 1826C provides a very cost-effective solution for a 24+2 Gigabit fiber without external Gigabit Ethernet transceivers.                                                                                                                                   

Note: In the following paragraphs, 24-port SS-SMII is referred to as port 0 ~ port 23, 2-port RGMII as port 24 and port 25 and MII port as port 26 (P0 ~ P 26 in abbreviation). The PHY address for P0 ~ P23 are “8~ 31” respectively. The PHY address “ 1” and “ 2” correspond to P24 and P25 respectively.

The IP 1826C 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 designer to access to the register in IP 1826C itself, the external PHY’s and the EEPROM. The LED informations is provided through a 2-wire LED interface by IP 1826C . With the external logic devices, the IP 1826C 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 IP 1826C also supports many advanced features which allow the designer 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 designer 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 IP 1826C can partition the network traffic by programming the VLAN table. The access control based on the MAC layer, the IP layer and TCP/UDP layer provides a method for the designer to implment the Class of Service and the network security.

The web management software ported on IP210, an ICPLUS 8051 based web controller, is provided for the designer to easily design a web management smart swicth. With the web management function, designers can remotely configure and monitor IP 1826C smart switches through browsers, such as Microsoft Internet Explorer, and no extra program is needed.

Feature :

• Provides 24 SS-SMII, 2 RGMII, 2 SERDES for fiber cable and one MII

• Built-in 2.75Mb RAM

• Support packet length up to 1536 Bytes

• Store & forward, share memory, non-blocking architecture

• Support flow control
  - 802.3x in full duplex
  - Collision/carrier_sense based backpressure in half duplex

• Provide up to 4K MAC address entries
  - CRC/ direct hashing algorithm
  - Programmable aging timer (55s~15.7hr) error < 4 %

  - Configurable MAC address table

  - Optional MAC address learning

  - IP filter 

• Support Port mirroring function (in, out, in&out)  

• Support IGMP snooping function
  - Version 1, 2

• Support flexible 3 trunking groups
  - (Port 0~3 port 4~7, Gigabit port 1~2)
  - Load balance based on (port, DA, SA, DA/SA)

• Link failure recovery

• Support VLAN
  - Port based VLAN
  - Tag based VLAN

- Add/ remove/ modify tag

• Support Class of Service

  - Port based CoS
  - 802.1Q priority tag based
  - IP TOS based (IPv4/IPv6)
  - TCP/UDP port based 

  - 2 level per port
  - WRR/ First-Come-First-serve/ Srict

  - Priority algorithm

• Broadcast storm control support

  - Broadcast rate control per chip

  - Block broadcast packet that does not belong to ARP or IP packet forwarded to CPU port

• Support port security

  - MAC address based
  - IP address based

  - TCP/UDP port based

• Supports Bandwidth control

  - 479 configurable levels for p0~p23 and MII port (from 32kbps to 63.75 Mbps)
  - 503 configurable levels for RGMII port (from 32kbps to 765 Mbps)

  - With/without flow control

• Supports 5 port state for Spanning Tree protocol

  - Blocking/ listening/ learning/ forwarding/ disable
  - Forward BPDU to CPU port

• Captures specific packet to CPU port

  - BPDU, LACP, 802.1x, GMRP, GVRP, ARP ICMP, IGMP, TCP, UDP, OSPF
  - Packets with specific TCP/UDP port number

• PHY address setting for CPU, giga 1 and giga2 port

• Operating mode configuration

  - Pin initial setting
  - 2 wire serial interface for EEPROM
  - 2 wire serial interface for CPU

• Counters for each port
  - RX/TX packet count
  - CRC error packet count

  - Dropped packet count

  - Collision count 

• Programmable serial driving LED functions

• Only one 25MHz crystal is needed

• Optional 25Mhz, 50Mhz clock output

• Adjustable IO voltage (3.3/2.5v MII, 3.3/1.8v SS-SMII, 2.7~1.9V RGMII)

• Built-in 2.5v and 1.9 regulator

• 144 pin EPAD. Lead-free package