ARPHRD_DDCMP      277 net/core/dev.c 	 ARPHRD_PPP, ARPHRD_CISCO, ARPHRD_LAPB, ARPHRD_DDCMP,
ARPHRD_DDCMP      132 net/decnet/dn_dev.c 	.type =		ARPHRD_DDCMP, /* DECnet over DDCMP */