if (sw_if_index == ~0 && pkt_trace == 0 && pcap == 0)
return clib_error_return (0, "Must specify trace, pcap or interface...");
if (sw_if_index == ~0 && pkt_trace == 0 && pcap == 0)
return clib_error_return (0, "Must specify trace, pcap or interface...");