HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual page 735

If you select the per-packet option, the router uses multiple routes in a round-
robin fashion, assigning each new packet that matches the routes to the route
listed after the route last used. Although this option balances traffic more
exactly, it is not generally recommended. Because each successive packet
takes a different route, packets may arrive at the destination out of order.
The ip load-sharing command simply allows the router to select more than
one best route when it learns multiple, equally good routes to a destination.
You must then configure the dynamic routing protocols that the router will
use to learn the routes. (See "Configuring RIP" on page 13-12, "Configuring
OSPF" on page 13-29, or "Configuring BGP" on page 13-65, depending on the
routing protocol that you have selected.)
For example, your router (Router C) connects a branch office to two different
routers at your organization's central office. Your WAN uses OSPF, and the
two routers at the central office are both ABRs that send your router summary
LSAs for the remote OSPF area at the central office. (See Figure 13-28.)
Branch Office
Area 1
192.168.49.0/24
192.168.50.0/24
Figure 13-28.Using Load Sharing with OSPF
To configure OSPF, you would enter these commands:
ProCurve(config)# router ospf
ProCurve(config-ospf)# network 192.168.49.0 0.0.0.255 area 1
ProCurve(config-ospf)# network 192.168.50.0 0.0.0.255 area 1
ProCurve(config-ospf)# network 10.1.1.0 0.0.0.3 area 1
ProCurve(config-ospf)# network 10.1.1.4 0.0.0.3 area 1
ProCurve(config-ospf)# area 1 stub
IP Routing—Configuring RIP, OSPF, BGP, and PBR
10.1.1.0/30
PPP 1
Router C
PPP 2
10.1.1.4/30
Configuring Load Sharing
Central Office
Area 0
ABR A
ABR B
192.168.0.0/16
13-121