发明名称 |
NETWORK PACKET FORWARDING LOOKUP WITH A REDUCED NUMBER OF MEMORY ACCESSES |
摘要 |
A switch/router contains intelligence for more quickly determining a next hop for a network layer packet. A network forwarding lookup table or array structure is configured so as to minimize the number of memory accesses required. This results in a decrease in time due to memory access and a decrease in computational overhead due to the memory accesses. In one embodiment, a first forwarding lookup is indexed by the first 16 bits of a destination address. A second forwarding lookup is indexed by the subsequent 8 bits of the destination address, and a final third forwarding lookup is indexed by the last 8 bits of the destination address. Each entry within a forwarding lookup contains either direction as to how properly forward the packet or reference to a next subsequent forwarding lookup.
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申请公布号 |
CA2301911(A1) |
申请公布日期 |
1999.12.23 |
申请号 |
CA19992301911 |
申请日期 |
1999.06.18 |
申请人 |
UNISPHERE SOLUTIONS, INC. |
发明人 |
KASTENHOLZ, FRANK |
分类号 |
H04L12/56;(IPC1-7):H04L12/56 |
主分类号 |
H04L12/56 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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