Managing Ecmp Group Paths - Dell Z9000 Configuration Manual

NOTE: An ecmp-group index is generated automatically for each unique ecmp-group when the
user configures 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, the ecmp-group command is used to enable the link bundle
monitoring feature. 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 0/0 Up
Te 0/1 Up

Managing ECMP Group Paths

Managing ECMP group paths is supported only on the Z9000 platform.
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)#
Equal Cost Multi-Path (ECMP)
Utilization[In Percent]
36
52
273