As a load-balancing method, resilient
hashing helps to lessen the possibility that a destination path is remapped when a LAG (Link
Aggregation Group) link fails.
About this task
When you create or update a tenant VRF, you can enable ECMP resilient hashing and you
can configure the maximum number of resilient hashing paths allowed (8, 16, or 64
paths). Resilient hashing is disabled by default. The default number of allowed
paths is the same as the default value for the SLX devices.
Procedure
-
To enable resilient hashing when you create a tenant VRF, use the efa tenant vrf
create command with the --rh-ecmp-enable
and --rh-max-path parameters, and set the maximum number of allowed
paths. For example,
# efa tenant vrf create --name <vrf-name> --tenant <tenant-name>
--rh-ecmp-enable=true/false --rh-max-path <8 | 16 | 64>
-
To enable resilient hashing on an existing tenant VRF, use the efa tenant vrf
update command with the --rh-ecmp-enable
and --rh-max-path parameters, and set the maximum number of allowed
paths. For example,
# efa tenant vrf update --name <vrf-name> --tenant <tenant-name>
--operation <rh-max-path-add | rh-max-path-delete | rh-ecmp-update>
--rh-ecmp-enable=true/false --rh-max-path <8 | 16 | 64>

Note
- The --max-path and --rh-max-path parameters can co-exist.
- You cannot choose the specific devices on which to configure
resilient hashing. Configuration applies to all SLX devices in the
tenant VRF.
- For more information about the commands,
including usage examples, see the
Extreme Fabric Automation Command Reference,
3.1.0
.