看一下这段英文是什么意思

Question

选自ip-sysctl.txt:
arp_announce - INTEGER
        Define different restriction levels for announcing the local
        source IP address from IP packets in ARP requests sent on
        interface:
        0 - (default) Use any local address, configured on any interface
        1 - Try to avoid local addresses that are not in the target's
        subnet for this interface. This mode is useful when target
        hosts reachable via this interface require the source IP
        address in ARP requests to be part of their logical network
        configured on the receiving interface. When we generate the
        request we will check all our subnets that include the
        target IP and will preserve the source address if it is from
        such subnet. If there is no such subnet we select source
        address according to the rules for level 2.
        2 - Always use the best local address for this target.
        In this mode we ignore the source address in the IP packet
        and try to select local address that we prefer for talks with
        the target host. Such local address is selected by looking
        for primary IP addresses on all our subnets on the outgoing
        interface that include the target IP address. If no suitable
        local address is found we select the first local address
        we have on the outgoing interface or on all other interfaces,
        with the hope we will receive reply for our request and
        even sometimes no matter the source IP address we announce.

Answer 1

arp_announce - 整型数
     ARP不是请求了么？那不就有个IP包了吗。其中有本地源IP。你要想定义一些个不同的级别，就把arp_announce设置成下面的数：
       0 默认
       1 猜
       2 再猜
     还有一次机会呦！