公开(公告)号：US20200136862A1

公开(公告)日：2020-04-30

申请号：US16173487

申请日：2018-10-29

Applicant: Cisco Technology, Inc.

Inventor： Prakash Chand JAIN ,  Sanjay Kumar HOODA ,  Victor M. MORENO ,  Satish Kumar KONDALAM

IPC: H04L12/46 ,  H04L12/715 ,  H04L12/713 ,  H04L12/741

Abstract: In one example, a router is configured to process communications according to a tunneling protocol to provide network overlay tunnels to facilitate virtual private networks (VPNs) for hosts, and to process communications associated with an external network with use of a provider virtualization routing and forwarding (VRF) instance. With use of a subscription function, the router receives an initial set of extranet VPN prefixes associated with the network overlays for storage in association with the provider VRF, as well as regularly receive publications of updates to extranet VPN prefixes associated with the network overlays. With use of a route obtaining function, the router, in response to receiving a communication associated with one of the stored extranet VPN prefixes at the provider VRF, sends to a communications management server a message indicating request for a host-to-router mapping and receive from the communications management server a reply including the host-to-router mapping.

公开(公告)号：US20180367337A1

公开(公告)日：2018-12-20

申请号：US16010444

申请日：2018-06-16

Applicant: Cisco Technology, Inc.

Inventor： Prakash Chand JAIN ,  Sanjay Kumar HOODA ,  Victor M. Moreno ,  Satish Kumar KONDALAM

IPC: H04L12/46 ,  H04L12/741

Abstract: In one embodiment, a method is performed at a first node. The method may include receiving, at a first node, a request from a source host associated with a network to communicate with a destination host. The first node may determine whether the destination host is associated with the network. If the destination host is not associated with the network, the first node may determine an instance identifier (IID) and a proxy egress tunnel router (PETR) locator address used to communicate with the destination host. The first node may send an indicator to an ingress tunnel router (ITR) to encapsulate a packet with the IID and the PETR locator address before sending the packet from the source host to the destination host.