Enhanced link aggregation group

You can configure an enhanced link aggregation group (LAG) on MX Series routers. When you associate a physical interface with an aggregated Ethernet interface, the physical child links are also associated with the parent aggregated Ethernet interface to form a LAG. In the absence of enhanced LAG support, one child next hop is created for each member link of an aggregated Ethernet interface for each VLAN interface. For example, an aggregate next hop for an aggregated Ethernet interface with 16 member links leads to the installation of 17 next hops per VLAN created. Thus the number of next hops supported on the routers with aggregated Ethernet interfaces is significantly reduced. With the enhanced LAG support, when the set chassis network-services enhanced-ip statement is configured, child next hops are not created for member links and, as a result, a higher number of next hops can be supported.