### carp hmac (pass test123)
17:35:34.677957 IP 10.0.2.50 > 224.0.0.18: VRRPv2, Advertisement, vrid 1, prio 100, authtype none, intvl 1s, length 36
17:35:36.087997 IP 10.0.2.50 > 224.0.0.18: VRRPv2, Advertisement, vrid 1, prio 100, authtype none, intvl 1s, length 36
17:35:37.498033 IP 10.0.2.50 > 224.0.0.18: VRRPv2, Advertisement, vrid 1, prio 100, authtype none, intvl 1s, length 36