Using a Virtual Internet Protocol Address to Represent Dually Connected Hosts in an Internet Protocol Overlay Network

摘要

Techniques are presented herein for distributing address information of host devices in a network. At a first router device, a packet is received from a first host device that is destined for a second host device. The first host device is dually-connected to the first router and a second router device. The second router device is part of a virtual port channel pair with the first router device. A message is sent to the second router device, the message indicating that the first host device is connected to the second router device. The packet is encapsulated with an overlay header and is sent to a third router device that is connected to the second host device. The encapsulated packet contains a Layer 2 address associated with the first host device and a Layer 3 address associated with the first host device.

主权项

1. A method comprising:
at a first router device in a network, receiving a packet from a first host device that is destined for a second host device in the network; determining that the packet is received on a first physical port associated with a virtual port and the virtual port being mapped to more than one physical port including the first physical port of the first router device and a second physical port of a second router device; encapsulating the packet received from the first host device with an overlay header; and sending the encapsulated packet to a third router device that is connected to the second host device, wherein the encapsulated packet contains a Layer 3 address associated with the virtual port.