Administrator Guide

NOTE: An ecmp-group index is generated automatically for each unique ecmp-group when you congure multipath
routes to the same network. The system can generate a maximum of 512 unique ecmp-groups. The ecmp-group indexes
are generated in even numbers (0, 2, 4, 6... 1022) and are for information only.
To enable the link bundle monitoring feature, for link bundle monitoring with ECMP, use the ecmp-group command.
You can congure the ecmp-group with id 2, enabled for link bundle monitoring. This is dierent from the ecmp-group index 2 that is
created by conguring routes and is automatically generated. These two ecmp-groups are not related in any way.
Managing ECMP Group Paths
Congure the maximum number of paths for an ECMP route that the L3 CAM can hold to avoid path degeneration.
When you do not congure the maximum number of routes, the CAM can hold a maximum ECMP per route.
To congure the maximum number of paths, use the following command.
NOTE: Save the new ECMP settings to the startup-cong (write-mem) then reload the system for the new settings to
take eect.
• Congure the maximum number of paths per ECMP group.
CONFIGURATION mode.
ip ecmp-group maximum-paths {2-64}
• Enable ECMP group path management.
CONFIGURATION mode.
ip ecmp-group path-fallback
Example of the ip ecmp-group maximum-paths Command
Dell(conf)#ip ecmp-group maximum-paths 3
User configuration has been changed. Save the configuration and reload to take effect
Dell(conf)#
Equal Cost Multi-Path (ECMP)
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