Chapter 11. Configuring network adapter offload settings

Procedure

1. Display the interface’s available offload features and their current state:

   # ethtool -k enp1s0
   ...
   esp-hw-offload: on
   ntuple-filters: off
   rx-vlan-filter: off [fixed]
   ...

   Copy to Clipboard Toggle word wrap

   The output depends on the capabilities of the hardware and its driver. Note that you cannot change the state of features that are flagged with [fixed].

2. Temporarily disable an offload feature:

   # ethtool -K <interface> <feature> <on|off>

   Copy to Clipboard Toggle word wrap

   • For example, to temporarily disable IPsec Encapsulating Security Payload (ESP) offload on the enp10s0u1 interface, enter:

     # ethtool -K enp10s0u1 esp-hw-offload off

     Copy to Clipboard Toggle word wrap

   • For example, to temporarily enable accelerated Receive Flow Steering (aRFS) filtering on the enp10s0u1 interface, enter:

     # ethtool -K enp10s0u1 ntuple-filters on

     Copy to Clipboard Toggle word wrap

Verification

1. Display the states of the offload features:

   # ethtool -k enp1s0
   ...
   esp-hw-offload: off
   ntuple-filters: on
   ...

   Copy to Clipboard Toggle word wrap

2. Test whether the problem you encountered before changing the offload feature still exists.

   • If the problem no longer exists after changing a specific offload feature:

     1. Contact Red Hat Support and report the problem.
     2. Consider permanently setting the offload feature until a fix is available.

   • If the problem still exists after disabling a specific offload feature:

     1. Reset the setting to its previous state by using the ethtool -K <interface> <feature> <on|off> command.
     2. Enable or disable a different offload feature to narrow down the problem.

Procedure

1. Identify the connection profile that uses the network interface on which you want to change the state of the offload feature:

   # nmcli connection show
   NAME     UUID                                  TYPE      DEVICE
   Example  a5eb6490-cc20-3668-81f8-0314a27f3f75  ethernet  enp1ss0
   ...

   Copy to Clipboard Toggle word wrap

2. Permanently change the state of the offload feature:

   # nmcli connection modify <connection_name> <feature> <on|off>

   Copy to Clipboard Toggle word wrap

   • For example, to permanently disable IPsec Encapsulating Security Payload (ESP) offload in the Example connection profile, enter:

     # nmcli connection modify Example ethtool.feature-esp-hw-offload off

     Copy to Clipboard Toggle word wrap

   • For example, to permanently enable accelerated Receive Flow Steering (aRFS) filtering in the Example connection profile, enter:

     # nmcli connection modify Example ethtool.feature-ntuple on

     Copy to Clipboard Toggle word wrap

3. Reactivate the connection profile:

   # nmcli connection up Example

   Copy to Clipboard Toggle word wrap