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vpp-manager: Add static neighbor for LL address on tap0 #938

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Merged
aritrbas merged 1 commit into from
Mar 2, 2026
Merged

vpp-manager: Add static neighbor for LL address on tap0 #938

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11 changes: 10 additions & 1 deletion vpp-manager/vpp_runner.go
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Original file line number Diff line number Diff line change
Expand Up @@ -224,9 +224,18 @@ func (v *VppRunner) configureIPv6LinkLocal(ifSpec *config.UplinkInterfaceSpec, i
ifSpec.InterfaceName, *config.GetCalicoVppDebug().FetchV6LLntries)

found:
err := v.vpp.AddNeighbor(&types.Neighbor{
SwIfIndex: ifState.TapSwIfIndex,
IP: ifState.IPv6LinkLocal.IP,
HardwareAddr: ifState.HardwareAddr,
Flags: types.IPNeighborStatic,
})
if err != nil {
return errors.Wrapf(err, "error add static neighbor for %s tap0 %d", ifState.IPv6LinkLocal.IP, ifState.TapSwIfIndex)
}
// Add LL /128 route to punt table so that punted link-local traffic
// reaches the host via tap instead of hitting fe80::/10 → ip6-link-local.
err := v.vpp.RouteAdd(&types.Route{
err = v.vpp.RouteAdd(&types.Route{
Table: common.PuntTableID,
Dst: common.FullyQualified(ifState.IPv6LinkLocal.IP),
Paths: []types.RoutePath{{
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