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Managing ECMP Group Paths
To manage ECMP group paths, you can configure the maximum number of paths for an ECMP route that the
L3 CAM can hold to avoid path degeneration. When you do not configure the maximum number of routes,
the CAM can hold a maximum ECMP per route.
To configure the maximum number of paths, use the following command.
NOTE:
Save the new ECMP settings to the startup-config (write-mem) then reload the system for the
new settings to take effect.
•
Configure 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)#
Creating an ECMP Group Bundle
Within each ECMP group, you can specify an interface.
If you enable monitoring for the ECMP group, the utilization calculation is performed when the average
utilization of the link-bundle (as opposed to a single link within the bundle) exceeds 60%.
1
Create a user-defined ECMP group bundle.
CONFIGURATION mode
ecmp-group ecmp-group-id
The range is from 1 to 64.
2
Add interfaces to the ECMP group bundle.
CONFIGURATION ECMP-GROUP mode
interface interface interface tengigabitethernet 0/0 interface port-channel 100
3
Enable the monitoring for the bundle.
CONFIGURATION ECMP-GROUP mode
link-bundle-monitor enable
Equal Cost Multi-Path (ECMP)
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Troubleshooting
