Packet handling during service virtualized computing instance migration

A non-transitory computer-readable storage medium that includes a set of instructions which, in response to execution by a processor of a computer system, cause the processor to perform a method of packet handling during service virtualized computing instance migration in a software-defined networking (SDN) environment that includes a source host and a target host, wherein the method comprises:

• configuring first reachability information to associate a first service virtualized computing instance with an active role and the source host supporting the first service virtualized computing instance;
• configuring second reachability information to associate a second service virtualized computing instance with a standby role, wherein both the first service virtualized computing instance and second service virtualized computing instance are configured to provide a service;
• in response to determining that a switchover is required to facilitate a migration of the first service virtualized computing instance from the source host to the target host and prior to the migration, updating the first reachability information to associate the first service virtualized computing instance with the standby role, and second reachability information to associate the second service virtualized computing instance with the active role;
• based on the updated second reachability information, forwarding a packet that requires the service to the second service virtualized computing instance;
• and
• in response to detecting a completion of the migration, updating the first reachability information to associate the first service virtualized computing instance with the target host instead of the source host.

A computer system configured to perform a method of packet handling during service virtualized computing instance migration in a software-defined networking (SDN) environment, the computer system comprising:

• a processor;
• and
• a non-transitory computer-readable medium having stored thereon instructions that, in response to execution by the processor, cause the processor to:
• configure first reachability information to associate a first service virtualized computing instance with an active role and a source host supporting the first service virtualized computing instance;
• configure second reachability information to associate a second service virtualized computing instance with a standby role, wherein both the first service virtualized computing instance and second service virtualized computing instance are configured to provide a service;
• in response to determination that a switchover is required to facilitate a migration of the first service virtualized computing instance from the source host to a target host and prior to the migration, update the first reachability information to associate the first service virtualized computing instance with the standby role, and the second reachability information to associate the second service virtualized computing instance with the active role;
• based on the updated second reachability information, forward a packet that requires the service to the second service virtualized computing instance;
• and
• in response to detection of a completion of the migration, update the first reachability information to associate the first service virtualized computing instance with the target host instead of the source host.