Nutanix, Inc.

Ramesh Gopalakrishnan Iyer

Arunkumar Navasivasakthivelsamy

Ritesh Rekhi

One embodiment of the present invention facilitates address resolution protocol (ARP) resolution in an extended subnet. A gateway of a first segment of the extended subnet can determine that a layer-2 address corresponding to a layer-3 destination address of a packet is locally unavailable. The gateway can then determine whether a respective egress interface of an ARP request for the layer-3 destination address is associated with a layer-2 subnet extension from the first segment to a second segment of the extended subnet. The extension can provide a common layer-2 broadcast domain comprising the first and second segments with a same default gateway layer-3 address. If the egress interface is associated with the extension, the gateway can insert a layer-3 address of a first endpoint associated with the extension as a source protocol address in the ARP request. The gateway can send the modified ARP request via the egress interface.

Method and system for efficient address resolution in extended subnets

One embodiment of the present invention provides a system for facilitating layer-2 subnet extension. During operation, the system can query, from a first administrative domain, a remote database of a second administrative domain for configuration information associated with one or more remote network segments. The system can obtain, from a user interface of the first administrative domain, an instruction for performing layer-2 subnet extension from a first network segment under the first administrative domain to a second network segment of the one or more remote network segments for providing a common layer-2 broadcast domain. The system can then send a remote instruction executable in the second administrative domain for configuring a remote endpoint for the extension. The system can also configure a local endpoint in the first network segment for the extension. Subsequently, the system can establish a data connection between the local and remote endpoints for the extension.

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Fremont, CA, United States of America

Ramesh Gopalakrishnan Iyer