我们在一个定制的Linux机器上运行一个路由器。 内核是3.14.14。
会发生什么情况是，当您在广播模式中设置路由器时，路由器的响应时间很慢：
# arping -b -c 50 -w 100000 -I em1.3069 -s 77.46.0.181 77.46.0.1 ARPING 77.46.0.1 from 77.46.0.181 em1.3069 Unicast reply from 77.46.0.1 [78:2B:CB:49:00:CA] 773.358ms Unicast reply from 77.46.0.1 [78:2B:CB:49:00:CA] 667.217ms Unicast reply from 77.46.0.1 [78:2B:CB:49:00:CA] 403.133ms Unicast reply from 77.46.0.1 [78:2B:CB:49:00:CA] 284.954ms Unicast reply from 77.46.0.1 [78:2B:CB:49:00:CA] 243.775ms 但是如果你不使用-b标志：
# arping -c 50 -w 100000 -I em1.3069 -s 77.46.0.181 77.46.0.1 ARPING 77.46.0.1 from 77.46.0.181 em1.3069 Unicast reply from 77.46.0.1 [78:2B:CB:49:00:CA] 189.149ms Unicast reply from 77.46.0.1 [78:2B:CB:49:00:CA] 0.773ms Unicast reply from 77.46.0.1 [78:2B:CB:49:00:CA] 0.815ms Unicast reply from 77.46.0.1 [78:2B:CB:49:00:CA] 0.760ms Unicast reply from 77.46.0.1 [78:2B:CB:49:00:CA] 0.798ms Sent 5 probes (1 broadcast(s)) Received 5 response(s)
只有第一个答复受到影响（广播一个）。 任何人都有一个想法可能会发生在这里？
感谢帮助。