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Adding static routes (referred to in this document as IP routes) to the routing table associates destination IPs to a specific Ethernet interface on the DSC Platforms. With multihoming scenarios, when the Stream Control Transmission Protocol (SCTP) establishes an association, this protocol selects one destination IP address and one outbound interface to that destination IP address. The choice is made according to the lowest cost route. Traffic over one IP route can be redirected to another IP route.

When there is a timeout error on a path to a destination IP address, SCTP tries to choose another outbound interface. The choice is made in a round-robin fashion. SCTP keeps using the same outbound interface until a timeout error occurs. You can achieve failover by providing multiple paths to the same destination IP address, thus allowing SCTP to manage the routing. 

Note

You can configure the IP/SCTP packet [also referred to as Maximum Transmission Unit (MTU) size (in bytes)] for the DSC SWe static routes to best suit your unique networking environment. For more information, refer to Configuring the IP/SCTP Packet Size.

This feature is not supported for the Management and Application VMs. The MTU for these interfaces is set by the Dynamic Host Configuration Protocol (DHCP) to 1500 bytes by default that cannot be changed.