Data center inbound routing optimization in the event of virtual machine mobility

An apparatus, located in a first data center, the apparatus comprising:

• at least one processing unit configured to optimize inbound routing by performing steps comprising:
• receiving an Ethernet virtual private network (EVPN) mobility event advertisement subsequent to a virtual machine (VM) moving from a second data center to the first data center;
• and
• in response to receiving the EVPN mobility event advertisement and determining that a local route has not been installed for the VM in a routing table of the apparatus:
• registering a current location of the VM in a Locator/ID Separation Protocol (LISP) mapping system, and
• notifying a network device in the second data center of the VM move,
• wherein the network device is notified via a mobility notification that includes (a) EVPN route attribute metadata including a sequence number, and (b) metadata associated with the VM including a ClassID providing grouping information for the VM,
• wherein the apparatus is a border leaf node or edge device of a first network in the first data center and the network device is a border leaf node or edge device of a second network in the second data center, and
• wherein, after receiving the notification of the VM move, the network device transmits, to each router attempting to route one or more packets to the VM via the network device, a respective message to retrieve a mapping for the VM from the LISP mapping system to update a mapping maintained by the router.

An apparatus, located in a first data center and configured to optimize inbound routing, the apparatus comprising:

• means for receiving an Ethernet virtual private network (EVPN) mobility event advertisement subsequent to a virtual machine (VM) moving from a second data center to the first data center;
• and
• means for, in response to receiving the EVPN mobility event advertisement and determining that a local route has not been installed for the VM in a routing table of the apparatus:
• registering a current location of the VM in a Locator/ID Separation Protocol (LISP) mapping system, and
• notifying a network device in the second data center of the VM move,
• wherein the network device is notified via a mobility notification that includes (a) EVPN route attribute metadata including a sequence number, and (b) metadata associated with the VM including a ClassID providing grouping information for the VM,
• wherein the apparatus is a border leaf node or edge device of a first network in the first data center and the network device is a border leaf node or edge device of a second network in the second data center, and
• wherein, after receiving the notification of the VM move, the network device transmits, to each router attempting to route one or more packets to the VM via the network device, a respective message to retrieve a mapping for the VM from the LISP mapping system to update a mapping maintained by the router.