I want to send UDP packets with port 4500 to Kernel.
For that I send UDP packets from external interface (70.1.1.58:port 5000)
to VPP host (70.1.1.51: 4500) and did below configuration.
Set up the punt environment-
* set punt udp 4500*
Created the tap interface -
* tap connect tap-0*
*In the below capture VPP trace, the packet are not going beyond the
node (**ip4-udp-punt)
**to kernel.*
*00:06:52:855590: dpdk-input*
* GigabitEthernet1/0/2 rx queue 0*
* buffer 0x174fcf: current data 14, length 1028, free-list 0, totlen-nifb
0, trace 0x9*
* PKT MBUF: port 0, nb_segs 1, pkt_len 1042*
* buf_len 2176, data_len 1042, ol_flags 0x0, data_off 128, phys_addr
0xd753b2c0*
* packet_type 0x211*
* Packet Types*
* RTE_PTYPE_L2_ETHER (0x0001) Ethernet packet*
* RTE_PTYPE_L3_IPV4 (0x0010) IPv4 packet without extension headers*
* RTE_PTYPE_L4_UDP (0x0200) UDP packet*
* IP4: ec:f4:bb:d5:68:a6 -> ec:f4:bb:c4:4d:46*
* UDP: 70.1.1.58 -> 70.1.1.51*
* tos 0x00, ttl 64, length 1028, checksum 0xcf79*
* fragment id 0x1901*
* UDP: 5000 -> 4500*
* length 1008, checksum 0x8d26*
*00:06:52:855591: ip4-input-no-checksum*
* UDP: 70.1.1.58 -> 70.1.1.51*
* tos 0x00, ttl 64, length 1028, checksum 0xcf79*
* fragment id 0x1901*
* UDP: 5000 -> 4500*
* length 1008, checksum 0x8d26*
*00:06:52:855592: ip4-lookup*
* fib 0 dpo-idx 5 flow hash: 0x00000000*
* UDP: 70.1.1.58 -> 70.1.1.51*
* tos 0x00, ttl 64, length 1028, checksum 0xcf79*
* fragment id 0x1901*
* UDP: 5000 -> 4500*
* length 1008, checksum 0x8d26*
*00:06:52:855592: ip4-local*
* UDP: 70.1.1.58 -> 70.1.1.51*
* tos 0x00, ttl 64, length 1028, checksum 0xcf79*
* fragment id 0x1901*
* UDP: 5000 -> 4500*
* length 1008, checksum 0x8d26*
*00:06:52:855592: ip4-udp-lookup*
* UDP: src-port 5000 dst-port 4500*
*00:06:52:855593: error-punt*
* ip4-udp-punt: udp port punt*
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