Flow-based local egress in a multisite datacenter

One or more non-transitory computer-readable storage media storing one or more computer instructions which, when executed by one or more processors, cause the one or more processors to perform:

• receiving, from a workload that has been migrated from a first site of the multisite datacenter to a second site of the multisite datacenter, a response for a first data flow, the first data flow originating at the first site prior to the workload being migrated from the first site to the second site;
• determining that a header of a packet of the response for the first data flow includes a second MAC address of a second local gateway in the second site and not a first MAC address of a first local gateway from the first site in which the first data flow originated;
• and
• in response to determining that the header of the packet of the response from the workload does not include the first MAC address of the first local gateway from the first site in which the first data flow originated, replacing, in the header of the packet of the response, the second MAC address of the second local gateway with the first MAC address of the first local gateway.

A system configured to implement flow-based local egress in a multisite datacenter, the system comprising:

• one or more processors;
• one or more memory units;
• and
• one or more non-transitory computer-readable storage media storing one or more computer instructions which, when executed by the one or more processors, cause the one or more processors to perform:
• receiving, from a workload that has been migrated from a first site of the multisite datacenter to a second site of the multisite datacenter, a response for a first data flow, the first data flow originating at the first site prior to the workload being migrated from the first site to the second site;
• determining that a header of a packet of the response for the first data flow includes a second MAC address of a second local gateway in the second site and not a first MAC address of a first local gateway from the first site in which the first data flow originated;
• and
• in response to determining that the header of the packet of the response from the workload does not include the first MAC address of the first local gateway from the first site in which the first data flow originated, replacing, in the header of the packet of the response, the second MAC address of the second local gateway with the first MAC address of the first local gateway.