DHCP报文 表-1是整个报文的封装格式,包括链路层头、IP头、UDP头和DHCP报文,其中dhcp主要的数据都封装在dhcp报文中。 表-2 是DHCP报文的格式,各字段的说明如下: Op:消息操作代码,1byte,既可以是引导请求(BOOTREQUEST)也可以是引导答复(BOOTREPLY),1为请求报文;2为响应报文。具体的报文类型在option字段中标识。 H...
Parameter NameParameter Meaning clientinterfacename Name of the interface on the DHCP client. leaseipaddress leaseipaddress: leased IP address. clientmacaddress clientmacaddress: MAC address of the client. onlineduration onlineduration: online duration. leaseduration leaseduration: lease. Possible...
Parameter NameParameter Meaning ifindexid Interface index. vlanid VLAN ID. pktdiscardcnt Number of discarded packets. Possible Causes DHCPv4 messages exceed the rate and the number of discarded DHCPv4 messages reaches the threshold. Procedure The device received a large number of DHCPv4 packet...
Not that it isn’t time. ISC DHCP is really mature code (think “frangible”), meaning it’s really hard to refactor it for things like unit tests and instrumentation. Ever tried putting a debug print in DHCP code? I have. It can be incredibly tricky to even log things. Like the fa...
A DHCP client can request its previous IP address, if it had one, but whether it gets that address or not depends on four things: scope, allocation, topology, and authority. Specifically: The larger the DHCP server’s scope of addresses, the more likely it is that the requested address ...
A DHCPv4 client sends vendor information in all DHCPv4 packets that it sends to the DHCPv4 server to indicate the vendor
If it is not, this parameter should be 0.Espandi t-tabella ValueMeaning DHCP_FLAGS_OPTION_IS_VENDOR This flag should be set if the option is provided by a vendor. [in] OptionIDDHCP_OPTION_ID value that specifies the code for a specific DHCP option....
If it is not, this parameter should be 0.Tabel uitvouwen ValueMeaning DHCP_FLAGS_OPTION_IS_VENDOR This flag should be set if the option is provided by a vendor. [in] OptionIDDHCP_OPTION_ID value that specifies the code for a specific DHCP option....
Meaning 0x0000000A Greater than 200 Mbps. 0x00000014 Greater than 80 Mbps, and less than or equal to 200 Mbps. 0x00000019 Greater than 20 Mbps, and less than or equal to 80 Mbps. 0x0000001E Greater than 4 Mbps, and less than or equal to 20 Mbps. ...
TRUE, if the DHCPv4 client is quarantine-enabled; Otherwise, it is FALSE. FilterStatus Integer flag value that specifies the status of the link-layer filter. Expand table ValueMeaning FILTER_STATUS_NONE 0x00000001 The DHCPv4 client MAC address does not match any filter. FILTER_STATUS_FULL...