HP/H3C VRRP Load Balancing

http://networkgeekstuff.com/networking/h3c-proprietary-vrrp-load-balancing/

аналогичная проприетарная технология у Extreme называется VRRP Fabric Routing:
на XOS:
https://gtacknowledge.extremenetworks.com/articles/How_To/An-example-of-VRRP-fabric-routing-configuration-to-achieve-active-active-forwarding-routing-on-all-VRRP-routers

на EOS:
https://gtacknowledge.extremenetworks.com/articles/How_To/How-To-Load-Share-with-Two-EOS-routers-Using-VRRP-Fabric-mode/?l=en_US&fs=RelatedArticle
https://gtacknowledge.extremenetworks.com/articles/Q_A/What-is-the-VRRP-Fabric-Routing-Helper-Router-option/?l=en_US&fs=RelatedArticle