If PORT_PAIR_MATCHING_VLAN, the Interconnect for this attachment is
part of a pair of ports that should have matching VLAN allocations.
This occurs with Cross-Cloud Interconnect to Azure remote locations.
While GCP's API does not explicitly group pairs of ports, the UI uses
this field to ensure matching VLAN ids when configuring a redundant
VLAN pair.
PortPairUnconstrainedVlan
PORT_PAIR_UNCONSTRAINED_VLAN means there is no constraint.
UndefinedPortPairVlan
A value indicating that the enum field is not set.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2026-05-18 UTC."],[],[]]