Associating mac addresses with addresses in a look-up table
OwnerSwee Lim, Hak Siminventors
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OwnerSwee Lim, Hak Siminventors
Estimating the term…
An ethernet switch associates addresses in a look-up table with received MAC addresses using a CRC algorithm, so that correspondence data about each MAC address can be stored in the corresponding section of the look-up table. When, as the look-up table is constructed, a given MAC address A0 hashes to an address H0 which is already associated with a previous MAC address, the MAC address is re-hashed using Walsh codes W1,m to provide a different look-up table address H1. This procedure can be performed any number of times y to generate different addresses Hn for n=1, . . . y. If it is performed sufficiently frequently, then it is likely that an address will be found which is free. In this way, the number of MAC addresses which will typically be associated with a single look-up table address is reduced, preferably to only one.
A method of associating look-up table addresses with media access control (MAC) addresses, the method including for successive MAC addresses A0:
(canceled)
A switch including a memory for defining a look-up table having a plurality of addresses and a processor for associating MAC addresses with addresses of the look-up table, the processor being arranged to use each MAC address A0 to generate y+1 look-up table addresses H0, H1, H2, . . . , Hy for y an integer greater than or equal to one, wherein each of the addresses H1, H2, . . . , Hy is obtained from the address A0 by first forming a respective string An having the same number of bits as A0, and then applying the algorithm by which H0 is obtained from A0, and according to at least one criterion to associate the address A0 with a selected one of the addresses H0, H1, H2, . . . , Hy.
A method of associating look-up table addresses with media access control (MAC) addresses, the method comprising:
The method of extracting information related to a media access control (MAC) address, the method comprising:
Dependencies are inferred from the claim text.