Patent ID: 8755379

Claim:
A link duplicate apparatus for fragmenting an Internet Protocol (IP) packet and distributing the fragments to a plurality of cards, the apparatus comprising: a scheduler for examining a queue depth of queues stored in a queue buffer of each of a plurality of line cards comprising a master card and slave cards; and a virtual queue manager for changing a packet transmitting priority of the master card and the slave cards, for fragmenting the IP received through a backbone network, and for transmitting the fragmented packets according to the packet transmitting priority of the master card and the slave cards; wherein changing the packet transmitting priority of the master card and the slave cards is based on queue information from the master card and the slave cards; wherein the IP packet is allocated so that all of the slave cards have the same queue depth, and wherein, when the IP packet data is transmitted by operating the slave card in substitution for the master card, a sequence number included in the fragmented packet is evaluated and then packet data, which is consecutive to the IP packet transmitted by the operation of the master card, is transmitted.