In one embodiment, a method includes building an address resolution cache for a layer-3 router in a first layer-2 datacenter, where the address resolution cache includes a plurality of entries, each of the entries containing a host network address, a host hardware address, and a switch identifier for a switch serving a host, intercepting an address resolution flood within the first layer-2 datacenter that seeks address resolution for a host in a second layer-2 datacenter, and generating a response to the address resolution flood that indicates a source in the second layer-2 datacenter, where data indicating the source in the second layer-2 datacenter is accessed from the address resolution cache.

Claims

18 · 2 independent · depth 3

18 granted claims

›1.independentA method comprising:nperforming the following actions in a layer-3 router in a first layer-2 datacenter:building an address resolution cache for the l…+8

›2.↳ 1The method of claim 1 further comprising:nimplementing a table in the layer-3 router for a list of switch identifiers; andaccessing at least one of th…d2+1

›4.↳ 1The method of claim 1 in which the layer-3 router comprises an Overlay Transport Virtualization (OTV) router.d2

›5.↳ 1The method of claim 1 in which the hardware address comprises a MAC address.d2

›6.↳ 1The method of claim 1 in which the network address comprises an IP address.d2

›7.↳ 1The method of claim 1 further comprising:nadvertising the address resolution cache to a layer-3 router in the second layer-2 datacenter.d2

›8.↳ 1The method of claim 1 in which building the address resolution cache comprises:nin response to receiving an address resolution request at the layer-3 …d2

›9.↳ 1The method of claim 1 in which building the address resolution cache comprises:ncaching data from address resolution responses received from the secon…d2

›10.independentA computer program product having a non-transitory computer readable medium tangibly recording computer program logic, the computer program product co…+8

›11.↳ 10The computer program product of claim 10 further comprising:ncode to implement a table in the layer-3 router for a list of switch identifiers; andcode…d2+1

›13.↳ 10The computer program product of claim 10 in which the layer-3 router comprises an Overlay Transport Virtualization (OTV) router.d2

›14.↳ 10The computer program product of claim 10 in which the hardware address comprises a MAC address.d2

›15.↳ 10The computer program product of claim 10 in which the network address comprises an IP address.d2

›16.↳ 10The computer program product of claim 10 further comprising:ncode to advertise the address resolution cache to a layer-3 router in the second layer-2 …d2

›17.↳ 10The computer program product of claim 10 in which building the address resolution cache comprises:ncode to, in response to receiving an address resolu…d2

›18.↳ 10The computer program product of claim 10 in which building the address resolution cache comprises:ncode to cache data from address resolution response…d2

Classifications

5 codes

IPC · International Patent Classification

Section H — Electricity

H04L12/747
H04L29/12
H04L12/721
H04L12/28
H04L12/701

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Hoang-Chuong Vu

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Type	Document	Date
related publication	US 20130182604 A1	18 Jul 2013

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