IP路由器无法将IP数据包发送给目标地址时,会给发送端主机返回一个目标不可达(Destination Unreachable Message)的ICMP消息,并在这个消息中显示不可达的具体原因。 在实际通信当中经常会遇到的错误代码是1,表示主机不可达(Host Unreachable),它是指路由表中没有该主机的信息,或者该主机没有连接到网络的意思。 此外,错误...
(可选)执行命令undo ipv6 icmp host-unreachable send,去使能接口的ICMPv6主机不可达报文的发送功能。 (可选)执行命令undo ipv6 icmp port-unreachable send,去使能接口的ICMPv6端口不可达报文的发送功能。 (可选)执行命令ipv6 icmp multicast-address echo receive disable,去使能设备接收ICMPv6组播ECHO报文后回复应答...
如果您的网络支持IPv6,您将看到一些IPv6地址的响应。如果您的网络不支持IPv6,您将看到“Destination host unreachable”或“Request timed out”的消息。同样,如果您使用的是macOS或Linux操作系统,也可以在终端中使用相同的命令进行检查。 以上4个方法可以帮助确定一个网站是否支持IPv6,更简便的办法是直接使用IPv6检测...
(a) IPv6 CE路由器应根据[RFC4443]第3.1节将ICMPv6 Destination Unreachable(ICMPv6目的地不可访问)消息发送回数据包源,如果数据包因该规则而被丢弃。 WPD-6:如果IPv6 CE路由器在DHCPv6中同时请求IA_NA和IA_PD选项,则它必须接受DHCPv6播发/回复消息中的IA_PD选择,即使该消息不包含任何地址,除非配置为仅通过DHCP...
(可选)执行命令undo ipv6 icmp host-unreachable send,去使能接口的ICMPv6主机不可达报文的发送功能。 (可选)执行命令undo ipv6 icmp port-unreachable send,去使能接口的ICMPv6端口不可达报文的发送功能。 (可选)执行命令ipv6 icmp multicast-address echo receive disable,去使能设备接收ICMPv6组播ECHO报文后回复应答...
host-admin-prohib 与目标的通信被管理策略禁止(Type=1,Code=1),属于目标不可达报文的一种。当数据报文无法被转发到目标节点或上层协议时,路由器或目标节点发送ICMPv6目标不可达差错报文 host-unreachable 地址不可达(Type=1,Code=3),属于目标不可达报文的一种 neighbor-advertisement 邻居公告报文(Type=136,Cod...
Destination Unreachable Sent by a router or the destination host to inform the sending host that the packet or payload cannot be delivered. Packet Too Big Sent by a router to inform a sending host that a packet is too large to forward. Time Exceeded Sent by a router to inform a sending ...
1e100.net (2607:f8b0:4020:805::200e)) 56 data bytes From [hostname] (2607:5300:201:2100::5d4) icmp_seq=1 Destination unreachable: Address unreachable ... --- google.com ping statistics --- 5 packets transmitted, 0 received, +3 errors, 100% packet loss, time 4085ms 我唯一没有...
Host Unreachable (code 1) Type 1 code 0 No route to destination Protocol Unreachable (code 2) Type 4 code 1 Unrecognized Next Header type encountered Port Unreachable (code 3) Type 1 code 4 Port unreachable Fragmentation Needed and DF was set (code...
“Reject route to destination.” This code is used if the route to the destination is a reject route. If the destination is unreachable due to congestion, no ICMP message is generated. A host that receives a Destination Unreachable message must inform the upper-layer process. Packet Too Big ...