H3C Technologies H3C S5560 Series Switches - Manual (Page 131)

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Configuring load sharing
If a routing protocol finds multiple equal-cost best routes to the same destination, the device forwards
packets over the equal-cost routes to implement load sharing.
Configuration procedure
Per-flow load sharing allows the device to forward flows over equal-cost routes. Packets of one flow travel
along the same routes. You can configure the device to identify a flow based on the source IP address,
destination IP address, source port number, destination port number, IP protocol number, and ingress
port.
In a complex network, when these criteria cannot distinguish flows, you can use the algorithm keyword
to specify an algorithm to identify flows for load sharing.
To configure per-flow load sharing:
Step Command Remarks
1. Enter system view. system-view N/A
2. Configure per-flow load
sharing.
ip load-sharing mode per-flow
[ algorithm algorithm-number |
[ dest-ip | dest-port | ingress-port
| ip-pro | src-ip | src-port ] * ]
[ slot slot-number ]
By default, the device performs
per-flow load sharing based on the
source IP address, destination IP
address, source port number,
destination port number, IP
protocol number, ingress port, and
VLAN.
Enabling local-first load sharing
Local-first load sharing distributes traffic preferentially across the output interfaces on the receiving IRF
member device if output interfaces for multiple equal-cost routes are on different members. This feature
enhances packets forwarding efficiency.
To enable local-first load sharing:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable local-first load
sharing.
ip load-sharing local-first enable
By default, local-first load sharing
is enabled.