Techniques are disclosed regarding interfaces, each configured to output network packets. The techniques can include a memory storing a first multipath group associated with the interfaces and a routing table, containing a first route to the first multipath group. The techniques can also include congestion detection logic configured to determine that an interface of the first multipath group is congested. The techniques can additionally include congestion avoidance logic configured to, upon determining that the interface of the first multipath group is congested, generate a second route in the routing table to a second multipath group associated with the interfaces of the first multipath group, wherein the second route diverts a flow of network packets from the first multipath group to the second multipath group.