Technical Documentation

Configuring Per-Flow and Per-Prefix Load Balancing (NSM Procedure)

You can enable per-prefix or per-flow load balancing so that the router elects a next hop independently of the route selected by other routers.

To configure load balancing in NSM:

  1. In the NSM navigation tree, select Device Manager > Devices.
  2. Click the Device Tree tab, and then double-click the device to select it.
  3. Click the Configuration tab. In the configuration tree, expand Forwarding Options > Load Balance.
  4. Add or modify settings as specified in Table 1.
  5. Click one:
    • OK—Saves the changes.
    • Cancel—Cancels the modifications.

Table 1: Load Balancing Configuration Details

Task Your Action

Enable per-flow load balancing based on hash values.

  1. In the Comment box, enter the comment.
  2. Select the Indexed Next Hop check box to generate a permuted index of next-hop entries for unicast and aggregate next hops.
  3. Click Per Flow next to Load Balance.
  4. In the Comment box, enter the comment for per-flow.
  5. Select the Hash Seed check box to configure based on the hash value.

Configure the hash parameter for per-prefix load balancing.

  1. Click Per Prefix next to Load Balance.
  2. In the Comment box, enter the comment for per prefix.
  3. From the Hash Seed list, select the hash value.

    Range: 0 through 65,535

    Default: 0

Published: 2009-08-23