Packet switching apparatus

摘要

The invention effectively avoids a CPU congestion in a packet switching apparatus. For this purpose, a packet switching apparatus of the invention comprises an AAL part connected with an ATM communication network where communication is performed in packets, a LAN control part connected to a LAN where communication is performed in frames, an IP part for translating a communication protocol of the ATM communication network and a communication protocol of the LAN communication network into each other, a congestion monitoring part for judging whether or not this IP part is in a congestion state, and an IP routing part for discarding a part or all of IP frames received by the LAN control part in case that this congestion monitoring part has judged that the IP part is in a congestion state.