Users Guide

Equal Cost Multi-Path (ECMP)

Equal cost multi-path (ECMP) supports multiple "best paths" in next-hop packet forwarding to a destination device.

Topics:

• ecmp-group

• hash-algorithm

• ip ecmp-group

• ip ecmp weighted

• link-bundle-distribution trigger-threshold

• link-bundle-monitor enable

ecmp-group

Provides a mechanism to monitor traffic distribution on an ECMP link bundle. A system log is generated when the standard deviation of

traffic distribution on a member link exceeds a defined threshold.

Syntax

ecmp-group {ecmp-group-id interface interface | link-bundle-monitor}

To remove the selected interface, use the ecmp-group no interface command.

To disable link bundle monitoring, use the ecmp-group no link-bundle-monitor command.

Parameters

ecmp-group ID Enter the identifier number for the ECMP group. The range is from 2 to 64.

interface Enter the following keywords and the interface information to add the interface to the

ECMP group:

• For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet

then the slot/port/subport information.

• For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/

port information.

•

For a LAG interface, enter the keywords port-channel then the slot/port

information.

Defaults Off

Command Modes

• CONFIGURATION

• CONFIGURATION ECMP-GROUP

568 Equal Cost Multi-Path (ECMP)