Bridging between network segments with a logical router
First Claim
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1. A system comprising:
- a first plurality of virtual machines belonging to a first overlay network;
a second plurality of virtual machines belonging to a second overlay network, wherein the first and second pluralities of virtual machines operate in a plurality of host machines, each host machine comprising a managed physical routing element (MPRE), each MPRE for forwarding data packets between virtual machines in different overlay networks,wherein a particular MPRE is configured as a bridge for bridging packets between virtual machines that are in different overlay networks but in a same IP (internet protocol) subnet by using a pairing between an overlay network identifier and a link layer address,wherein (i) a logical interface of the particular MPRE is configured as a bridge logical interface for interfacing with a particular overlay network and (ii) the bridge logical interface is identified by an overlay network identifier for the particular overlay network,wherein a data message between virtual machines operating on a same host that are in different overlay networks but in a same IP subnet is forwarded by the particular MPRE to the data message'"'"'s destination without exiting the host machine.
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Abstract
Some embodiments provide a system that includes a first set of virtual machines belonging to a first overlay network and a second set of virtual machines belonging to a second overlay network. The first and second sets of virtual machines operate in several host machines, each of which includes a managed physical routing element (MPRE) for routing data packet between virtual machines in different overlay networks. A particular MPRE is configured as a bridge for routing packets between virtual machines that are in different overlay networks but in a same IP (internet protocol) subnet.
312 Citations
20 Claims
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1. A system comprising:
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a first plurality of virtual machines belonging to a first overlay network; a second plurality of virtual machines belonging to a second overlay network, wherein the first and second pluralities of virtual machines operate in a plurality of host machines, each host machine comprising a managed physical routing element (MPRE), each MPRE for forwarding data packets between virtual machines in different overlay networks, wherein a particular MPRE is configured as a bridge for bridging packets between virtual machines that are in different overlay networks but in a same IP (internet protocol) subnet by using a pairing between an overlay network identifier and a link layer address, wherein (i) a logical interface of the particular MPRE is configured as a bridge logical interface for interfacing with a particular overlay network and (ii) the bridge logical interface is identified by an overlay network identifier for the particular overlay network, wherein a data message between virtual machines operating on a same host that are in different overlay networks but in a same IP subnet is forwarded by the particular MPRE to the data message'"'"'s destination without exiting the host machine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system comprising:
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a first plurality of virtual machines belonging to a first overlay network; and a second plurality of virtual machines belonging to a second overlay network, wherein the first and second pluralities of virtual machines are operating in a plurality of host machines, each host machine comprising a managed physical routing element (MPRE) for forwarding data packets between virtual machines in different overlay networks, wherein at least one particular MPRE of the MPREs is configured as a bridge that learns pairings between link layer addresses and overlay network identifiers from the routed data packets and bridges packets by using the learned pairings to look up an overlay network identifier from a data link layer address, wherein a particular bridge logical interface (bridge LIF) of the particular MPRE that is for interfacing with a particular overlay network is identified by an overlay network identifier for the particular overlay network, wherein a data message between virtual machines that are in different overlay networks but in a same IP subnet and that both operate on a same host as the particular MPRE is forwarded by the particular MPRE to the data message'"'"'s destination without exiting the host machine. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method comprising:
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defining a managed physical routing element (MPRE) that is to be operated in a plurality of host machines, wherein the MPRE operating in a host machine is for routing a data packet from a first segment of a logical network to a second segment of the logical network; and configuring a particular MPRE operating in a particular host machine to act as a bridge that (i) learns pairings between link layer addresses and overlay network identifiers from the routed data packets and (ii) bridges packets by using the learned pairings to look up an overlay network identifier from a data link layer address, wherein a particular bridge logical interface (bridge LIF) of the particular MPRE that is for interfacing with a particular overlay network is identified by an overlay network identifier for the particular overlay network, wherein a data message between virtual machines that are in different overlay networks but in a same IP subnet and that both operate on the particular host machine is forwarded by the particular MPRE to the data message'"'"'s destination without exiting the host machine. - View Dependent Claims (17, 18, 19, 20)
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Specification