ICMP message types and codes for IPv4 ICMP defines about 43 message types for IPv4 and reserves 44 -255 for future use. Only a couple of message types have sub-types. Sub-types are defined by using code values. We can categorize ICMP message types into the following three categories. Error...
These sub types of Errors are also defined by codes.iii. ChecksumThe checksum is calculated by the header and the data that is used to detect the errors.iv. Rest of the HeaderAs you know the ICMP message is encapsulated in the IP datagram. Rest of the header section in the ICMP ...
Instead of using ports, ICMP relies on message types and codes to distinguish between different types of control and error messages. Each ICMP message has a unique Type field and a Code field: Type Field Specifies the general type of ICMP message, such as "Echo Request" or "Destination Unrea...
Here are some common ICMP message types and codes: Echo Request (Type 8, Code 0) – Used by the ping command to test if a host is reachable. Echo Reply (Type 0, Code 0) – Sent by a host to respond to an Echo Request message. ...
HRESULT get_IcmpTypesAndCodes( BSTR *icmpTypesAndCodes ); 参数 icmpTypesAndCodes 返回值 无 备注 此属性是可选的。 另请参阅 INetFwRule 接口页的“备注”部分中介绍的更改属性的限制。 icmpTypesAndCodes 参数是 ICMP 类型和代码的列表,用分号分隔。 “*”表示所有 ICMP 类型和代码。 要求 展开表 要...
This error occurs when a datagram is too big for a network over which it must travel. To report this problem, ICMP uses different message types and codes in both versions of IP. In IPv4, it uses a destination unreachable message with the code field set to 4. In IPv6, it uses a pack...
HRESULT get_IcmpTypesAndCodes( BSTR *icmpTypesAndCodes ); 参数 icmpTypesAndCodes 返回值 无 备注 此属性是可选的。 另请参阅 INetFwRule 接口页的“备注”部分中介绍的更改属性的限制。 icmpTypesAndCodes 参数是 ICMP 类型和代码的列表,用分号分隔。 “*”表示所有 ICMP 类型和代码。 要求 展开表 ...
HRESULT put_IcmpTypesAndCodes( BSTR icmpTypesAndCodes ); 参数 icmpTypesAndCodes 返回值 无 备注 此属性是可选的。 另请参阅 INetFwRule 接口页的“备注”部分中介绍的更改属性的限制。 icmpTypesAndCodes 参数是 ICMP 类型和代码的列表,用分号分隔。 “*”表示所有 ICMP 类型和代码。 要求 展开表...
The device supports the configuration of ICMP message forwarding based on an ICMP name or specified type and code. Table 2-13 lists the supported ICMP names. For details about the ICMP messages corresponding to the types and codes, see Table 2-13. Table 2-13 ICMP names supported by the de...
ICMPv6 Type Statistics Summary table: Displays statistics for ICMPv6 on z/OS v1.12 or later systems. For more information about ICMP message types, see the ICMP types and codes appendix of theIBM z/OS Communications Server: IP System Administrator’s Commandsbook....