REDIRECTING TRAFFIC IN A VIRTUAL DISTRIBUTED ROUTER ENVIRONMENT

摘要

A LRE (logical routing element) that have LIFs that are active in all host machines spanned by the LRE as well as LIFs that are active in only a subset of those spanned host machines is provided. A host machine having an active LIF for a particular L2 segment would perform the L3 routing operations for network traffic related to that L2 segment. A host machine having an inactive LIF for the particular L2 segment would not perform L3 routing operations for the network traffic of the L2 segment.

主权项

1. A system comprising:
a plurality of host machines that are configured to operate a logical network based on a logical routing element (LRE) for routing packets between different segments of the logical network, wherein each host machine operates a local instance of the LRE as a managed physical routing element (MPRE), the LRE comprising a plurality of logical interfaces (LIFs), each LIF for interfacing with a different segment of the logical network, wherein a particular network segment interfacing a particular LIF is associated with a plurality of identifiers, each identifier for identifying a different host machine in the plurality of host machines, wherein routing a packet into the particular network segment comprises (i) identifying an inbound LIF and an outbound LIF at a MPRE operated by a first host machine and (ii) selecting one of the plurality of identifiers and forwarding the packet to a second host machine identified by the selected address when the identified outbound LIF is the particular LIF, wherein the MPRE of the second host machine identifies a destination address of the packet in the particular network segment.