R2511-HP MSR Router Series Layer 3 - IP Services Configuration Guide(V5)

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Configuring load sharing

If a routing protocol finds multiple equal-cost best routes to the same destination, the router forwards

packets over the equal-cost routes to implement load sharing.

The maximum number of routes for load sharing is eight.

Static routing/IPv6 static routing, RIP/RIPng, OSPF/OSPFv3, BGP/IPv6 BGP, and IS-IS/IPv6 IS-IS

support load sharing.

Configuring load sharing

Load sharing is implemented in the following ways:

• Bandwidth-based load sharing—Packets are forwarded based on the configurable bandwidths of

the interfaces. The greater bandwidth an interface has, the more packets it forwards.

• User-based load sharing—Load sharing based on the source IP address of packets.

Configuring bandwidth-based load sharing

Before you configure this feature, disable fast forwarding. For information about fast forwarding, see

"Configuring fast forwarding."

If multiple outbound interfaces/next hops to a destination are found during packet forwarding:

• When bandwidth-based load sharing is enabled, the device calculates the workload proportion for

each interface based on the bandwidths of all the interfaces, and then determines through which

interface to forward subsequent packets based on both the interfaces' workload proportions and

the number of packets the current interface has forwarded.

• When bandwidth-based load sharing is disabled, all the interfaces are used for packet forwarding

in turn.

To configure bandwidth-based load sharing:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Configure bandwidth-based

load sharing.

bandwidth-based-sharing Disabled by default.

3. Enter interface view.

interface interface-type

interface-number

N/A