Parallel lookup tables for locating information in a packet switched network
An address lookup table in a multiport switch is implemented as a plurality of address sub-tables. Entries in the address sub-tables are stored at row addresses based on a hash of the information in the entry. Entries in the address sub-tables are stored in one of the address sub-tables, as determin...
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| Main Authors | , |
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| Format | Patent |
| Language | English |
| Published |
24.01.2006
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| Online Access | Get full text |
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| Summary: | An address lookup table in a multiport switch is implemented as a plurality of address sub-tables. Entries in the address sub-tables are stored at row addresses based on a hash of the information in the entry. Entries in the address sub-tables are stored in one of the address sub-tables, as determined by pre-selected information relating to the entry. For example, the least significant bit of a source or destination MAC address may be used to select between two address sub-tables. In this manner, the total memory size of the address table can be increased relative to a single address sub-table while decreasing the length of the longest chain and the length of the average chain. |
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