"network is unreachable: getsockopt" 错误是一个常见的网络问题,可能由多种原因引起。通过仔细检查网络配置、路由、防火墙设置、网络硬件和 DNS 解析等方面,可以找到并解决问题。预防此类问题的关键在于定期维护网络设备、备份网络配置、更新防火墙和安全组策略以及监控网络性能。这些措施有助于确保网络的稳定性和安全性。
A locally detected error condition (such as an unreachable network) causes a return of -1 and errno to be set to the error number. To receive messages on a datagram socket, recvfrom(3SOCKET) is used: recvfrom(s, buf, buflen, flags, (struct sockaddr *) &from, &fromlen);...
IP options for outgoing datagrams. This socket option may be used to set IP options to be included in each outgoing datagram. IP options to be sent are set withsetsockopt()(seegetsockopt(3SOCKET)). Thegetsockopt(3SOCKET)call returns the IP options set in the lastsetsockopt()call. IP optio...
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This may be essential informa- tion in resolving routing problems, e.g., when you discover that a host or a net- work is unreachable. Although it may be too long or volatile on many systems to be very helpful, the routing table is sometimes useful in getting a quick idea of This is...
Description Overlay network randomly has specific machines unreachable. Containers on these nodes are unable to reach containers on other nodes, and vice-versa. This happens much more frequently on larger clusters, but we've seen it on s...
A black hole router does not return ICMP Destination Unreachable messages when it needs to fragment an IP datagram with the Don't Fragment bit set. TCP depends on receiving these messages to perform Path MTU Discovery. With this feature enabled, TCP will try to send segments without the Don'...
The following ICMPv6 messages are supported: v Destination unreachable v Packet too big v Time exceeded (hop limit exceeded) v Echo request/reply v Parameter problem v Multicast listener discovery: – Group membership query – Report – Done v Neighbor discovery: – Router solicitation and ...
A black hole router does not return ICMP Destination Unreachable messages when it needs to fragment an IP datagram with the Don't Fragment bit set. TCP depends on receiving these messages to perform Path MTU Discovery. With this feature enabled, TCP will try to send segments without the Don'...
A "destination unreachable" message will be sent by a router or by the originating host if a datagram can not be sent on because there is no route to the final destination; it will be sent by a router when it encounters a firewall prohibition; it will be sent by a destination node ...