containernetworking / plugins / 34734770182

53%

master: 55%

Pull #1302

github

vlan: make IPAM optional for L2-only interfaces

The vlan plugin unconditionally delegates to the IPAM plugin and fails
with "IPAM plugin returned missing IP config" when the configuration
carries no ipam section. macvlan and ipvlan already treat an empty
ipam.type as "L2 mode": the interface is created and brought up without
addresses, leaving address configuration to a chained plugin or to the
workload itself (for example through SLAAC).

Apply the same rule to vlan: skip the IPAM ADD/DEL/CHECK/STATUS
delegation when ipam.type is empty and just set the link up. The
existing IPAM path is unchanged.

Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
Signed-off-by: Simon Zhou <jp.zdm2008@gmail.com>

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