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ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter13 Configuring IP over ATM
Configuring IP Load Sharing
Configuring IP Load Sharing
Load sharing allows a device to distribute the outgoing and incoming traffic among multiple best paths
to a particular destination. In per packet load sharing, each packet is distributed among multiple best
paths to the destination. On the Catalyst 8540 MSR, Catalyst 8510 MSR and LightStream 1010
platforms, per packet load sharing can be enabled for all packets or for TCP packets only.

Configuring TCP Packet Load Sharing

To enable per-packet load sharing for TCP traffic only on an interface, use the following interface
configuration command:
Note This command is only available for Gigabit Ethernet line cards.
Note This feature should only be used with switches equippe d with Enhanced ATM Router Modules. This
command cannot be used with switches equipped with stan dard ATM Router Modules.
Note Per packet load balancing should not be configured on MPLS-enabled interfaces.
Example
The following example enables load-sharing for TCP packets on ethernet interface 0:
Switch# configure terminal
Switch(config)# interface ethernet 0
Switch(config-if)# ip load-sharing per-packet

Configuring Packet Load Sharing for all IP Traffic

To enable per-packet load sharing for all IP traffic, perform the following steps in interface configuration
mode:
Command Purpose
ip load-sharing per-packet Enables per-packet load sharing for TCP traffic only.
Command Purpose
Step1 Switch(config-if)# ip load-sharing per-packet Enables per packet load sharing on an interface
on the router