High-speed CLD-based internal packet routing

摘要

A method of routing internal network traffic within a computing system comprises receiving a network packet at a configurable logic device (CLD), parsing the network packet to obtain a destination address, searching a predetermined range of a routing table wherein each row of the routing table specifies a range of possible destination addresses and routing information, identifying a matching row of the routing table wherein the destination address falls within the range of possible destination addresses of the matching row, and routing the packet according to the routing information.

主权项

1. A method of routing internal network traffic within a computing system, comprising:
receiving a network packet at a configurable logic device (CLD); parsing the network packet to obtain a destination address and a virtual local area network (VLAN) identifier; locating in a VLAN-indexed table, a record specifying a predetermined range of rows within a routing table to search, the VLAN-indexed table including a record for each of a plurality of VLAN identifiers; searching the predetermined range of rows within the routing table wherein each row of the routing table specifies one or more ranges of possible destination addresses and routing information associated with each of the one or more ranges, the routing information specifying a destination processor within a group of processors; identifying a matching row of the routing table wherein the destination address falls within at least one range of possible destination addresses of the matching row; and routing the packet to the destination processor specified by the routing information associated with the at least one range within which the destination address fell within the matching row.