You need to set loop5007 as the bvi for it to behave as a l3 interface instead 
of l2:
set int l2 bridge loop5007 5007 bvi

Best
ben

> -----Original Message-----
> From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of suresh
> vuppala
> Sent: vendredi 4 mars 2022 22:41
> To: vpp-dev@lists.fd.io
> Subject: [vpp-dev] Ping to loopback behind Vxlan tunnel is failing #vpp-
> dev
> 
> HI VPP-DEV team,
> 
> ubuntu 20.04
> vpp v22.06-rc0~79-g48bdf24ad
> 
> I have my ubuntu 20.04 running the latest VPP code. The ubuntu machine is
> connected to a router. I have a static vxlan tunnel configured between
> bare metal and VPP. The tunnel is up.
> Now I have created a loop5007 and added the vxlan tunnel in the same BD.
> Ping is failing from external router to the loopback behind vxlan in VPP.
> I see that l2 mac learning is happening on VPP but ping is failing. Can
> you please suggest what went wrong here
> 
> 
> 
> 
> VPP trace:
> 
> 
> create loopback interface instance 0
> 
> lcp create loop0 host-if loop0
> 
> set interface state loop0 up
> 
> set interface ip address loop0 2001:db8::1/64
> 
> set interface ip address loop0 192.0.2.1/24 <http://192.0.2.1/24>
> 
> 
> 
> create bond mode lacp load-balance l34 id 0
> 
> set interface state TenGigabitEthernetd8/0/0 up
> 
> set interface state TenGigabitEthernet5e/0/0 up
> 
> bond add BondEthernet0 TenGigabitEthernetd8/0/0 long-timeout
> 
> bond add BondEthernet0 TenGigabitEthernet5e/0/0 long-timeout
> 
> lcp create BondEthernet0 host-if bond0
> 
> 
> 
> create sub-interfaces BondEthernet0 80
> 
> lcp create BondEthernet0.80 host-if bond0.80
> 
> 
> 
> create sub-interfaces BondEthernet0 70
> 
> lcp create BondEthernet0.70 host-if bond0.70
> 
> 
> 
> set interface state BondEthernet0 up
> 
> set interface ip address BondEthernet0.70 172.16.101.229/24
> <http://172.16.101.229/24>
> 
> set interface state BondEthernet0.70 up
> 
> 
> 
> create vxlan tunnel src 172.16.101.229 dst 172.12.168.9 vni 5007 decap-
> next l2
> 
> create bridge-domain 5007 learn 1 forward 1 flood 1 arp-term 1 bd-tag 5007
> 
> create loopback interface mac cc:cc:cc:dd:dd:01 instance 5007
> 
> 
> 
> set interface mtu packet 9000 vxlan_tunnel0
> 
> set interface state vxlan_tunnel0 up
> 
> set interface l2 bridge vxlan_tunnel0 5007
> 
> set interface l2 bridge loop5007 5007
> 
> set interface ip address loop5007 192.168.7.9/24 <http://192.168.7.9/24>
> 
> set interface state loop5007 up
> 
> 
> 
> Packet 12
> 
> 
> 
> 00:43:02:602880: dpdk-input
> 
>   TenGigabitEthernet5e/0/0 rx queue 0
> 
>   buffer 0x4c3fd8: current data 0, length 152, buffer-pool 0, ref-count 1,
> trace handle 0xb
> 
>                    ext-hdr-valid
> 
>   PKT MBUF: port 0, nb_segs 1, pkt_len 152
> 
>     buf_len 2176, data_len 152, ol_flags 0x180, data_off 128, phys_addr
> 0x130ff680
> 
>     packet_type 0x291 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_IP_CKSUM_NONE (0x0090) no IP cksum of RX pkt.
> 
>       PKT_RX_L4_CKSUM_GOOD (0x0100) L4 cksum of RX pkt. is valid
> 
>       PKT_RX_L4_CKSUM_NONE (0x0108) no L4 cksum of RX pkt.
> 
>     Packet Types
> 
>       RTE_PTYPE_L2_ETHER (0x0001) Ethernet packet
> 
>       RTE_PTYPE_L3_IPV4_EXT_UNKNOWN (0x0090) IPv4 packet with or without
> extension headers
> 
>       RTE_PTYPE_L4_UDP (0x0200) UDP packet
> 
>   IP4: 2c:f8:9b:57:a5:df -> 3c:fd:fe:e1:61:08 802.1q vlan 70
> 
>   UDP: 172.12.168.9 -> 172.16.101.229
> 
>     tos 0x00, ttl 253, length 134, checksum 0x75be dscp CS0 ecn NON_ECN
> 
>     fragment id 0x7ee3, flags DONT_FRAGMENT
> 
>   UDP: 58360 -> 4789
> 
>     length 114, checksum 0x0000
> 
> 00:43:02:602892: bond-input
> 
>   src 2c:f8:9b:57:a5:df, dst 3c:fd:fe:e1:61:08, TenGigabitEthernet5e/0/0 -
> > BondEthernet0
> 
> 00:43:02:602980: ethernet-input
> 
>   IP4: 2c:f8:9b:57:a5:df -> 3c:fd:fe:e1:61:08 802.1q vlan 70
> 
> 00:43:02:603046: ip4-input
> 
>   UDP: 172.12.168.9 -> 172.16.101.229
> 
>     tos 0x00, ttl 253, length 134, checksum 0x75be dscp CS0 ecn NON_ECN
> 
>     fragment id 0x7ee3, flags DONT_FRAGMENT
> 
>   UDP: 58360 -> 4789
> 
>     length 114, checksum 0x0000
> 
> 00:43:02:603110: ip4-lookup
> 
>   fib 0 dpo-idx 14 flow hash: 0x00000000
> 
>   UDP: 172.12.168.9 -> 172.16.101.229
> 
>     tos 0x00, ttl 253, length 134, checksum 0x75be dscp CS0 ecn NON_ECN
> 
>     fragment id 0x7ee3, flags DONT_FRAGMENT
> 
>   UDP: 58360 -> 4789
> 
>     length 114, checksum 0x0000
> 
> 00:43:02:603184: ip4-receive
> 
>     UDP: 172.12.168.9 -> 172.16.101.229
> 
>       tos 0x00, ttl 253, length 134, checksum 0x75be dscp CS0 ecn NON_ECN
> 
>       fragment id 0x7ee3, flags DONT_FRAGMENT
> 
>     UDP: 58360 -> 4789
> 
>       length 114, checksum 0x0000
> 
> 00:43:02:603261: ip4-udp-lookup
> 
>   UDP: src-port 58360 dst-port 4789
> 
> 00:43:02:603342: vxlan4-input
> 
>   VXLAN decap from vxlan_tunnel0 vni 5007 next 1 error 0
> 
> 00:43:02:603421: l2-input
> 
>   l2-input: sw_if_index 12 dst cc:cc:cc:dd:dd:01 src 88:d9:8f:25:f9:25
> [l2-learn l2-fwd l2-flood arp-term-l2bd l2-flood ]
> 
> 00:43:02:603502: l2-learn
> 
>   l2-learn: sw_if_index 12 dst cc:cc:cc:dd:dd:01 src 88:d9:8f:25:f9:25
> bd_index 1
> 
> 00:43:02:603591: l2-fwd
> 
>   l2-fwd:   sw_if_index 12 dst cc:cc:cc:dd:dd:01 src 88:d9:8f:25:f9:25
> bd_index 1 result [0x113000000000d, 13] none
> 
> 00:43:02:603683: l2-output
> 
>   l2-output: sw_if_index 13 dst cc:cc:cc:dd:dd:01 src 88:d9:8f:25:f9:25
> data 08 00 45 00 00 54 e0 ac 00 00 40 01
> 
> 00:43:02:603778: loop5007-output
> 
>   loop5007
> 
>   IP4: 88:d9:8f:25:f9:25 -> cc:cc:cc:dd:dd:01
> 
>   ICMP: 192.168.7.10 -> 192.168.7.9
> 
>     tos 0x00, ttl 64, length 84, checksum 0x0a99 dscp CS0 ecn NON_ECN
> 
>     fragment id 0xe0ac
> 
>   ICMP echo_request checksum 0x7ef8 id 18117
> 
> 00:43:02:603992: l2-input
> 
>   l2-input: sw_if_index 13 dst cc:cc:cc:dd:dd:01 src 88:d9:8f:25:f9:25
> [l2-learn l2-fwd l2-flood arp-term-l2bd l2-flood ]
> 
> 00:43:02:604154: l2-learn
> 
>   l2-learn: sw_if_index 13 dst cc:cc:cc:dd:dd:01 src 88:d9:8f:25:f9:25
> bd_index 1
> 
> 00:43:02:604269: l2-fwd
> 
>   l2-fwd:   sw_if_index 13 dst cc:cc:cc:dd:dd:01 src 88:d9:8f:25:f9:25
> bd_index 1 result [0x113000000000d, 13] none
> 
> 00:43:02:604387: error-drop
> 
>   rx:loop5007
> 
> 00:43:02:604509: drop
> 
> 
> 
>   l2-fwd: Reflection Drop

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