Hello all. I am using VPP 19.04 with DPDK 19.02. When I start a pcap trace on physical or tap interfaces, pcap trace status reports it as 'local0'.
vpp# pcap rx trace on max 500 intfc tap0 file subif-rx.pcap pcap rx capture on... vpp# pcap rx trace status max is 500 for interface local0 to file /tmp/subif-rx.pcap pcap rx capture is on: 0 of 500 pkts... vpp# pcap tx trace on max 500 intfc tap0 file subif-tx.pcap pcap tx capture on... vpp# pcap tx trace status max is 500 for interface local0 to file /tmp/subif-tx.pcap pcap tx capture is on: 0 of 500 pkts... vpp# pcap rx trace status max is 500 for interface local0 to file /tmp/subif-rx.pcap pcap rx capture is on: 1 of 500 pkts... vpp# pcap tx trace status max is 500 for interface local0 to file /tmp/subif-tx.pcap pcap tx capture is on: 2 of 500 pkts... Additionally, a single ICMP ping which resulted in a single packet in each direction through that tap interface had two identical frames in the tx direction. # tshark -nn -r /tmp/subif-rx.pcap 1 0.000000 192.168.1.249 → 192.168.1.142 ICMP 98 Echo (ping) request id=0x088e, seq=1/256, ttl=64 # tshark -nn -r /tmp/subif-tx.pcap 1 0.000000 192.168.1.142 → 192.168.1.249 ICMP 98 Echo (ping) reply id=0x088e, seq=1/256, ttl=255 2 0.000001 192.168.1.142 → 192.168.1.249 ICMP 98 Echo (ping) reply id=0x088e, seq=1/256, ttl=255 tap0 is in a l2 xconnect with a VLAN sub-interface, does that explain the duplication? vpp# sh mode l3 local0 l3 TenGigabitEthernet3/0/0 l3 TenGigabitEthernet3/0/1 l3 GigabitEthernet81/0/1 l3 GigabitEthernet81/0/2 l3 GigabitEthernet81/0/3 l2 xconnect tap0 GigabitEthernet81/0/1.3010270 l2 xconnect GigabitEthernet81/0/1.3010270 tap0 Charles
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