if (sw_if_index == ~0 && pkt_trace == 0 && pcap == 0)
return clib_error_return (0, "Must specify trace, pcap or interface...");
+ if (pkt_trace && pcap)
+ return clib_error_return
+ (0, "Packet trace and pcap are mutually exclusive...");
+
if (pkt_trace && sw_if_index != ~0)
return clib_error_return (0, "Packet trace filter is per-system");