Hi ben,

Please find below trace (dpdk-input and memif-input).... in application I am 
just writing back buffers I received on memif..

00:02:56:971957: dpdk-input
GigabitEthernet4/0/0 rx queue 0
buffer 0x98114: current data 0, length 74, buffer-pool 0, ref-count 1, 
totlen-nifb 0, trace handle 0x0
ext-hdr-valid
l4-cksum-computed l4-cksum-correct
PKT MBUF: port 1, nb_segs 1, pkt_len 74
buf_len 2176, data_len 74, ol_flags 0x180, data_off 128, phys_addr 0x56604580
packet_type 0x11 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0
rss 0x0 fdir.hi 0x0 fdir.lo 0x0
Packet Offload Flags
PKT_RX_IP_CKSUM_GOOD (0x0080) IP cksum of RX pkt. is valid
PKT_RX_L4_CKSUM_GOOD (0x0100) L4 cksum of RX pkt. is valid
Packet Types
RTE_PTYPE_L2_ETHER (0x0001) Ethernet packet
RTE_PTYPE_L3_IPV4 (0x0010) IPv4 packet without extension headers
IP4: a4:bb:6d:0f:bf:56 -> 00:0d:48:49:12:a2
ICMP: 172.16.16.17 -> 172.16.82.4
tos 0x00, ttl 128, length 60, checksum 0x0423 dscp CS0 ecn NON_ECN
fragment id 0x7c68
ICMP echo_request checksum 0x4baf
00:02:56:971980: ethernet-input
frame: flags 0x3, hw-if-index 2, sw-if-index 2
IP4: a4:bb:6d:0f:bf:56 -> 00:0d:48:49:12:a2
00:02:56:971994: ip4-input-no-checksum
ICMP: 172.16.16.17 -> 172.16.82.4
tos 0x00, ttl 128, length 60, checksum 0x0423 dscp CS0 ecn NON_ECN
fragment id 0x7c68
ICMP echo_request checksum 0x4baf
00:02:56:972001: ip4-lookup
fib 0 dpo-idx 3 flow hash: 0x00000000
ICMP: 172.16.16.17 -> 172.16.82.4
tos 0x00, ttl 128, length 60, checksum 0x0423 dscp CS0 ecn NON_ECN
fragment id 0x7c68
ICMP echo_request checksum 0x4baf
00:02:56:972007: ip4-arp
ICMP: 172.16.16.17 -> 172.16.82.4
tos 0x00, ttl 128, length 60, checksum 0x0423 dscp CS0 ecn NON_ECN
fragment id 0x7c68
ICMP echo_request checksum 0x4baf
00:02:56:972019: ip4-drop
ICMP: 172.16.16.17 -> 172.16.82.4
tos 0x00, ttl 128, length 60, checksum 0x0423 dscp CS0 ecn NON_ECN
fragment id 0x7c68
ICMP echo_request checksum 0x4baf
00:02:56:972083: error-drop
rx:GigabitEthernet4/0/0
00:02:56:972088: drop
ip4-arp: ARP requests sent

Packet 2

00:02:56:972299: memif-input
memif: hw_if_index 3 next-index 4
slot: ring 0
00:02:56:972327: ethernet-input
frame: flags 0x1, hw-if-index 3, sw-if-index 3
ARP: 02:fe:87:ff:c6:2a -> ff:ff:ff:ff:ff:ff
00:02:56:972335: arp-input
request, type ethernet/IP4, address size 6/4
02:fe:87:ff:c6:2a/192.168.1.1 -> 00:00:00:00:00:00/192.168.1.1
00:02:56:972339: arp-reply
request, type ethernet/IP4, address size 6/4
02:fe:87:ff:c6:2a/192.168.1.1 -> 00:00:00:00:00:00/192.168.1.1
00:02:56:972350: error-drop
rx:memif0/0
00:02:56:972351: drop
null-node: blackholed packets
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