MX Series Virtual Chassis support for locality bias

You can configure locality bias for aggregated Ethernet and equal-cost multipath (ECMP) traffic in an MX Series Virtual Chassis. Locality bias directs unicast transit traffic for ECMP groups and aggregated Ethernet bundles to egress links in the same (local) member router in the Virtual Chassis rather than to egress links in the remote member router, provided that the local member router has an equal or larger number of available egress links than the remote member router. Configuring locality bias enables you to conserve bandwidth on the Virtual Chassis port links by directing all ECMP and aggregated Ethernet data traffic to local egress links rather than across the Virtual Chassis port links between member routers. To enable locality bias, configure the locality-bias statement at the [edit virtual-chassis] hierarchy level.