Fixes #20197: Correct validation for virtual chassis parent interface #20337
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Fixes: #20197
Summary
Fixes an
AttributeErrorduring parent interface validation by checking the VC on devices (useself.device.virtual_chassisandself.parent.device.virtual_chassis). This allows a parent on another member of the same VC and rejects mismatches.Thanks @elipsion for the STR and for pointing out the incorrect reference.