Fault tolerant routing in a non-hot-standby configuration of a network routing system

A computer-implemented failover method comprising:

• actively monitoring, by a fault manager executing on a control blade of a plurality of server blades of a network routing system, an active processing engine of a plurality of processing engines within the network routing system;
• and
• responsive to detecting a fault associated with the active processing engine dynamically replacing the active processing engine with a non-hot-standby processing engine by
• identifying virtual private networks (VPNs) and virtual routers (VRs), defined by one or more objects and objects groups, that were operating on the active processing engine prior to detection of the fault, and
• recreating the VPNs and VRs within the non-hot-standby processing engine.

A computer-readable storage medium tangibly embodying a set of instructions, which when executed by one or more processors associated with a control blade of a network routing system or a plurality of processing engines of the network routing engine cause the one or more processors to perform a failover method comprising:

• actively monitoring an active processing engine of the plurality of processing engines;
• and
• responsive to detecting a fault associated with the active processing engine dynamically replacing the active processing engine with a non-hot-standby processing engine of the plurality of processing engines by
• determining one or more software contexts that were associated with the active processing engine prior to detection of the fault, and
• creating one or more replacement software contexts within the non-hot-standby processing engine corresponding to the one or more software contexts.