Mitigating oversubscription of traffic to edge nodes in a data center

A non-transitory computer readable medium comprising instructions to be executed in a computing device to cause the computing device to carry out a method of mitigating oversubscription of traffic to edge services gateways (ESGs) in a data center, a router in the data center including a first route between an internet protocol (IP) address of the first active edge of the ESGs and a first classless inter domain routing (CIDR) block assigned to the first active edge and a second route between an IP address of the second active edge of the ESGs and a second CIDR block assigned to the second active edge, the method comprising:

• receiving, by a host of the data center, traffic metrics corresponding to the ESGs;
• determining traffic congestion at the first active edge of the ESGs in response to the traffic metrics;
• dividing, in response to the traffic congestion, the first CIDR block into a first CIDR sub-block and a second CIDR sub-block;
• modifying, in a routing table of the router, the first route to be between the IP address of the first active edge and the first CIDR sub-block;
• creating, in the routing table of the router, a third route between an IP address of the second active edge of the ESGs and the second CIDR sub-block;
• and
• creating, in the routing table of the router, a fourth route between the IP address of the second active edge and a third CIDR block, the third CIDR block being an aggregation of CIDR blocks of a plurality of under-utilized routes.

A computing system, comprising:

• edge services gateways (ESGs) of a data center including a first active edge and a second active edge;
• a router including a first route between an internet protocol (IP) address of the first active edge and a first classless inter domain routing (CIDR) block assigned to the first active edge, and a second route between an IP address of the second active edge and a second CIDR block assigned to the second active edge;
• a host in the data center having a hardware platform;
• and
• the host configured to:
• receive traffic metrics corresponding to the ESGs;
• determine traffic congestion at the first active edge of the ESGs in response to the traffic metrics;
• divide, in response to the traffic congestion, the first CIDR block into a first CIDR sub-block and a second CIDR sub-block;
• modify, in a routing table of the router, the first route to be between the IP address of the first active edge and the first CIDR sub-block;
• create, in the routing table of the router, a second route between the IP address of a second active edge of the ESGs and the second CIDR sub-block;
• create, in the routing table of the router, a fourth route between the IP address of the second active edge and a third CIDR block, the third CIDR block being an aggregation of CIDR blocks of a plurality of under-utilized routes.