In this state, the client must be prepared to receive an extended DHCPACKNOWLEDGE message from the installation server. The following table lists the required values in the fields of this message:
| DHCP Header | ||||
| Field (length) | Value | Comment | ||
| op (1) | 2 | Code for BOOTP REPLY | ||
| htype (1) | * | |||
| hlen (1) | * | |||
| hops (1) | * | |||
| xid (4) | * | |||
| secs (2) | * | |||
| flags (2) | * | |||
| ciaddr (4) | 0.0.0.0 | PXE client always sets this value to 0.0.0.0 | ||
| yiaddr (4) | a0, a1, a2, a3 | Client&rsquo’s IP address. Provided by server | ||
| siaddr (4) | a0, a1, a2, a3 | Next bootstrap server IP address | ||
| giaddr (4) | * | |||
| chaddr (16) | * | Client&rsquo’s MAC address | ||
| sname (64) | * | Can be overloaded if using Opt 66 | ||
| bootfile (128) | * | Can be overloaded if using Opt 67 | ||
| 99.130.83.99 | ||||
| DHCP Options | ||||
| Tag Name | Tag Number | Length | Type | Data Field |
| Client UUID/GUID | 97 | 17 | 20 | per Attachment K |
| Tag Name | Tag Number | Length Field | Data Field | |
| DHCP Message Type | 53 | 1 | 4 = DHCPACKNOWLEDGE | |
| Server Identifier | 54 | 4 | a1, a2, a3, a4 | |
| Encapsulated Vendor Options (DHCP Option #43) | ||||
| Tag Name | Tag Number | Length Field | Data Field | |
| DHCP_VENDOR | 43 | varies | Encapsulated options below | |
| (Multiple DHCP_VENDOR options can be used) | ||||
| "PXEClient" Encapsulated Options for DHCP Option #43 | ||||
| Tag Name | Tag Number | Length Field | Data Field | |
| PXE_PAD | 0 | None | None | |
| MTFP IP Addr | 1 | 4 | a0, a1, a2, a3 | |
| MTFTP Client UDP | 2 | 2 | Port Number | |
| MTFTP Server UDP | 3 | 2 | Port Number | |
| MTFTP Start Delay | 4 | 1 | ||
| MTFTP Timeout Delay | 5 | 1 | ||
| PXE_END | 255 | None |
The options fields in this message must include the following:
After receiving this message, the client moves to the executable download state.