Abstract: A system for diagnosing breakdowns of a switch by using plural light emitting diodes (LEDs) on a front panel (10) of the switch includes: plural port LEDs (31, 32, 33, 34, . . . 3n), a user interface (50) for generating an instruction to convert display modes of the port LEDs, a CPU (central processing unit) (60) coupled to the user interface for dealing with the instruction, an LED driver (70) coupled to the port LEDs for refreshing the displays of the port LEDs; a physics (PHY) module (80) coupled to the LED driver and used for obtaining the operation statuses of the ports; and a periodic service manager (90) coupled to the LED driver for triggering the LED driver periodically. Display modes of the port LEDs can be converted selectively, which reduces the number of port LEDs needed, and still allows administrators to conveniently diagnose any breakdowns of the switch.

Abstract: A system for diagnosing breakdowns of a switch by using plural light emitting diodes (LEDs) on a front panel (10) of the switch includes: plural port LEDs (31, 32, 33, 34, . . . 3n), a user interface (50) for generating an instruction to convert display modes of the port LEDs, a CPU (central processing unit) (60) coupled to the user interface for dealing with the instruction, an LED driver (70) coupled to the port LEDs for refreshing the displays of the port LEDs; a physics (PHY) module (80) coupled to the LED driver and used for obtaining the operation statuses of the ports; and a periodic service manager (90) coupled to the LED driver for triggering the LED driver periodically. Display modes of the port LEDs can be converted selectively, which reduces the number of port LEDs needed, and still allows administrators to conveniently diagnose any breakdowns of the switch.

Abstract: A switching device includes: an Internet Group Management Protocol (IGMP) snooping module (101), a packet dispatching module (103), a plurality of ports (105), a router physical abstraction layer (router HAL) (102) including a forwarding table (1020), and a Flash memory (104) including a port table (1040), a recording table (1041) and a routing table (1042). The packet dispatching module identifies whether a received packet via one port is an IGMP packet, and sends the IGMP packet to the IGMP snooping module. The IGMP snooping module adds a number of the port and a routing relationship respectively to the port table and the routing table, and sends a notice to the router HAL to add a corresponding mapping relationship to the forwarding table. Then the IGMP snooping module transfers multicast data packets according to contents of the forwarding table. A related method for processing a multicast packet is also provided.