This object identifies the local virtual interface through which matching traffic's next hop should be reached, applicable only to virtual interfaces connected over point-to-point links; a value of 0 means no specific next-hop interface is set. Administrators configure it to steer matched traffic out a particular egress interface as part of policy-based forwarding, rather than relying on standard routing table lookups. For example, an engineer might set this to the VI index of a dedicated backup link so that traffic matching a specific ACL is forced out that path instead of the default route.