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  1. RHEL
  2. RHEL-59083

Add support for configuring per-device IPv4 sysctl forwarding option in NetworkManager

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    • ssg_networking
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      Definition of Done:

      Please mark each item below with ( / ) if completed or ( x ) if incomplete:

      ( ) The acceptance criteria defined below are met.

      Given a system administrator has configured a NetworkManager connection profile for an Ethernet interface (e.g., eth1),

      When the system administrator sets ipv4.forwarding to yes in the NetworkManager profile for that interface,

      Then NetworkManager should apply the sysctl setting net.ipv4.conf.eth1.forward=1, enabling IP forwarding for that interface

      Given a system administrator has configured a NetworkManager connection profile for an Ethernet interface (e.g., eth1),

      When the system administrator sets ipv4.forwarding to no in the NetworkManager profile for that interface,

      Then NetworkManager should apply the sysctl setting net.ipv4.conf.eth1.forward=0, disabling IP forwarding for that interface

       

      Given a system administrator has configured a NetworkManager connection profile for an Ethernet interface (e.g., eth1),

      When the system administrator sets ipv4.forwarding to auto in the NetworkManager profile for that interface,

      Then NetworkManager should set the forwarding only if there is an activated shared connection. 

       

      Given a system administrator has configured a NetworkManager connection profile for an Ethernet interface (e.g., eth1),

      When the system administrator sets ipv4.forwarding to ignore in the NetworkManager profile for that interface,

      Then NetworkManager should not modify the current forwarding configuration for that interface.

      ( ) Code changes are included in a downstream build attached to an errata.

      ( ) All required testing (manual and/or automated) passes successfully.

      ( ) Related documentation updates (if applicable) have been completed.

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      Definition of Done: Please mark each item below with ( / ) if completed or ( x ) if incomplete: ( ) The acceptance criteria defined below are met. Given a system administrator has configured a NetworkManager connection profile for an Ethernet interface (e.g., eth1), When the system administrator sets ipv4.forwarding to yes in the NetworkManager profile for that interface, Then NetworkManager should apply the sysctl setting net.ipv4.conf.eth1.forward=1, enabling IP forwarding for that interface Given a system administrator has configured a NetworkManager connection profile for an Ethernet interface (e.g., eth1), When the system administrator sets ipv4.forwarding to no in the NetworkManager profile for that interface, Then NetworkManager should apply the sysctl setting net.ipv4.conf.eth1.forward=0, disabling IP forwarding for that interface   Given a system administrator has configured a NetworkManager connection profile for an Ethernet interface (e.g., eth1), When the system administrator sets ipv4.forwarding to auto in the NetworkManager profile for that interface, Then NetworkManager should set the forwarding only if there is an activated shared connection.    Given a system administrator has configured a NetworkManager connection profile for an Ethernet interface (e.g., eth1), When the system administrator sets ipv4.forwarding to ignore in the NetworkManager profile for that interface, Then NetworkManager should not modify the current forwarding configuration for that interface. ( ) Code changes are included in a downstream build attached to an errata. ( ) All required testing (manual and/or automated) passes successfully. ( ) Related documentation updates (if applicable) have been completed.
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      To meet the needs of users configuring multi-interface nodes (OCP) and enable IPv4 forwarding per interface (See RHEL-36429), NetworkManager should support configuring sysctl settings for IPv4 forwarding.

      Specifically, the setting net.ipv4.conf.<interface>.forward=1 should be configurable via NetworkManager profiles. This will allow specific interfaces to enable IPv4 forwarding, such as for use cases like Metallb load balancing, without requiring global ip_forward=1 settings.

       

       

              rh-ee-sfaye Stanislas Faye
              rh-ee-sfaye Stanislas Faye
              Network Management Team Network Management Team
              Vladimir Benes Vladimir Benes
              Mayur Patil Mayur Patil
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                Created:
                Updated: