Managing Ecmp Group Paths; Creating An Ecmp Group Bundle - Dell S6100 Configuration Manual

Enable link bundle monitoring using the ecmp-group command.
NOTE: An ecmp-group index is generated automatically for each unique ecmp-group when you configure 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.
For link bundle monitoring with ECMP, to enable the link bundle monitoring feature, use the ecmp-group command. In the following
example, the ecmp-group with id 2, enabled for link bundle monitoring is user configured. This is different from the ecmp-group index 2 that
is created by configuring routes and is automatically generated.
These two ecmp-groups are not related in any way.
Example of Viewing Link Bundle Monitoring
Dell# show link-bundle-distribution ecmp-group 1
Link-bundle trigger threshold - 60
ECMP bundle - 1 Utilization[In Percent] - 44 Alarm State - Active
Interface Line Protocol
Te 1/1/1 Up
Te 1/1/1 Up

Managing ECMP Group Paths

To avoid path degeneration, configure the maximum number of paths for an ECMP route that the L3 CAM can hold. 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: For the new settings to take effect, save the new ECMP settings to the startup-config (write-mem) then reload the
system.
• 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
Utilization[In Percent]
36
52
Equal Cost Multi-Path (ECMP) 307