IPIPSTAT
IPIPSTAT(IPIP_STAT_IPACKETS, "total input packets");
IPIPSTAT(IPIP_STAT_OPACKETS, "total output packets");
IPIPSTAT(IPIP_STAT_HDROPS, "packets too short for header length");
IPIPSTAT(IPIP_STAT_QFULL, "packets dropped due to queue full");
IPIPSTAT(IPIP_STAT_PDROPS, "packets blocked due to policy");
IPIPSTAT(IPIP_STAT_SPOOF, "IP spoofing attempts");
IPIPSTAT(IPIP_STAT_FAMILY, "protocol family mismatched");
IPIPSTAT(IPIP_STAT_UNSPEC, "missing tunnel-endpoint address");
IPIPSTAT(IPIP_STAT_IBYTES, "input bytes received");
IPIPSTAT(IPIP_STAT_OBYTES, "output bytes processed");