Patent ID: 8964767
Filing Date: 2015-02-24
Classification: H04L

Abstract:
1. A method for forwarding a packet at a managed switching element in a first domain, the method comprising: receiving a packet from a local end machine that operates on a same physical machine as the managed switching element; at the managed switching element, encapsulating the packet with a first context identifier that identifies a first logical egress port of a first logical datapath set implemented by (i) the managed switching element, ii) other managed switching elements in the first domain, and (iii) managed switching elements in a second domain, wherein the first logical datapath set couples to end machines in both the first domain and the second domain, wherein the first logical datapath set maps a destination address of the packet to the first logical egress port; at the managed switching element, based on a mapping of the first logical egress port to a second logical egress port of a second logical datapath set that couples to machines in only the first domain, encapsulating the once-encapsulated packet with a second context identifier that identifies the second logical egress port, wherein the second logical datapath set is implemented by only (i) the managed switching element and (ii) other managed switching elements in the first domain, wherein the second logical datapath set maps logical ports of the first logical datapath set to logical ports of the second logical datapath set and a third logical datapath set, implemented by managed switching elements in the second domain, maps logical ports of the first logical datapath set to logical ports of the third logical datapath set; and transmitting the twice-encapsulated packet out of a port of the managed switching element based on the second context identifier.