diff --git a/internet/node-arp.go b/internet/node-arp.go
deleted file mode 100644
index d0afdec..0000000
--- a/internet/node-arp.go
+++ /dev/null
@@ -1,46 +0,0 @@
-package internet
-
-import (
-	"log/slog"
-
-	"github.com/soypat/lneto"
-	"github.com/soypat/lneto/arp"
-	"github.com/soypat/lneto/ethernet"
-)
-
-type NodeARP struct {
-	handler arp.Handler
-	vld     lneto.Validator
-}
-
-func (narp *NodeARP) Reset(cfg arp.HandlerConfig) error {
-	return narp.handler.Reset(cfg)
-}
-
-func (narp *NodeARP) LocalPort() uint16 { return 0 }
-
-func (narp *NodeARP) Protocol() uint64 { return uint64(ethernet.TypeARP) }
-
-func (narp *NodeARP) ConnectionID() *uint64 { return narp.handler.ConnectionID() }
-
-func (narp *NodeARP) Demux(EtherFrame []byte, arpOff int) error {
-	return narp.handler.Demux(EtherFrame, arpOff)
-}
-
-func (narp *NodeARP) Encapsulate(EtherFrame []byte, arpOff int) (int, error) {
-	n, err := narp.handler.Encapsulate(EtherFrame, arpOff)
-	if err != nil || n == 0 {
-		return 0, err // end with error.
-	}
-	afrm, _ := arp.NewFrame(EtherFrame[arpOff:])
-	slog.Info("handle", slog.String("out", afrm.String()))
-	return n, err
-}
-
-func (narp *NodeARP) StartQuery(proto []byte) error {
-	return narp.handler.StartQuery(proto)
-}
-
-func (narp *NodeARP) QueryResult(proto []byte) ([]byte, error) {
-	return narp.handler.QueryResult(proto)
-}