对 4 台服务器的 Active Directory 域执行 Ping 操作时，只能 ping 通一个 IP 地址

Question

我们有一个带有 4 台广告服务器的域。当我运行时，ping domain它总是 ping 相同的地址，而不是其他三个。绝对不会。如果我运行，host domain四个 IP 地址会以不同的顺序返回，那么为什么我只看到一个带有ping？

以下是 . 返回的部分内容strace ping c1 domain。在选择以 结尾的 IP 地址之前，似乎每个 IP 地址都存在某种类型的连接213。

socket(AF_INET, SOCK_DGRAM, IPPROTO_IP) = 4
connect(4, {sa_family=AF_INET, sin_port=htons(0),sin_addr=inet_addr("172.18.100.57")}, 16) = 0
getsockname(4, {sa_family=AF_INET, sin_port=htons(49807), sin_addr=inet_addr("172.18.100.242")}, [16]) = 0
connect(4, {sa_family=AF_UNSPEC, sa_data="\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 16) = 0
connect(4, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("172.18.100.59")}, 16) = 0
getsockname(4, {sa_family=AF_INET, sin_port=htons(56595), sin_addr=inet_addr("172.18.100.242")}, [16]) = 0
connect(4, {sa_family=AF_UNSPEC, sa_data="\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 16) = 0
connect(4, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("172.18.100.213")}, 16) = 0
getsockname(4, {sa_family=AF_INET, sin_port=htons(38331), sin_addr=inet_addr("172.18.100.242")}, [16]) = 0
connect(4, {sa_family=AF_UNSPEC, sa_data="\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 16) = 0
connect(4, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("172.18.100.56")}, 16) = 0
getsockname(4, {sa_family=AF_INET, sin_port=htons(54349), sin_addr=inet_addr("172.18.100.242")}, [16]) = 0
close(4)                                = 0
socket(AF_INET, SOCK_DGRAM, IPPROTO_IP) = 4
connect(4, {sa_family=AF_INET, sin_port=htons(1025), sin_addr=inet_addr("172.18.100.213")}, 16) = 0
getsockname(4, {sa_family=AF_INET, sin_port=htons(46179), sin_addr=inet_addr("172.18.00.242")}, [16]) = 0
close(4)                                = 0
setsockopt(3, SOL_RAW, ICMP_FILTER, ~(1<<ICMP_ECHOREPLY|1<<ICMP_DEST_UNREACH|1<<ICMP_SOURCE_QUENCH|1<<ICMP_REDIRECT|1<<ICMP_TIME_EXCEEDED|1<<ICMP_PARAMETERPROB), 4) = 0