L3 VPN: sometimes port doesnt reply on arp request

create a tenant with 2 CPEs
create a L3 VPN service

send L3 traffic between the hosts (c1u1 to c1u2 and viceversa)

sometimes the test fails
noticed on the wireshark that the test failed since the port c1u1 (CPE1 UNI1) didnt reply to arp req. that was sent to it

attached logs and capture files

IPs and MACs
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IP_ADD_C1U1: 110.1.1.1/24
UNI_ID_C1U1: 111
HOST_IP_C1U1: 110.1.1.2
HOST_MAC_C1U1: 00:AA:AB:22:11:00

IP_ADD_C1U2: 110.1.2.1/24
UNI_ID_C1U2: 112
HOST_IP_C1U2: 110.1.2.2
HOST_MAC_C1U2: 00:AA:AB:22:12:00

IP_ADD_C2U1: 110.2.1.1/24
UNI_ID_C2U1: 121
HOST_IP_C2U1: 110.2.1.2
HOST_MAC_C2U1: 00:AA:AB:22:21:00

IP_ADD_C2U2: 110.2.2.1/24
UNI_ID_C2U2: 122
HOST_IP_C2U2: 110.2.2.2
HOST_MAC_C2U2: 00:AA:AB:22:22:00
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