IP Frame
After the configuration is done, the link is able to carry IP data as a payload of the PPP frame. This code indicates that IP data is being carried.
| PPP header | IPCP header | Data ::: |
IPCP header:
| 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Code | Identifier | Length | |||||||||||||||||||||||||||||
| Data ::: |
Code.
8 bits.
Specifies the function to be performed.
| Code | Description | References |
|---|---|---|
| 0 | Vendor Specific. | RFC 2153 |
| 1 | Configure-Request. | |
| 2 | Configure-Ack. | |
| 3 | Configure-Nak. | |
| 4 | Configure-Reject. | |
| 5 | Terminate-Request. | |
| 6 | Terminate-Ack. | |
| 7 | Code-Reject. |
Identifier. 8 bits.
Used to match requests and replies.
Length. 16 bits.
Size of the packet including the header.
Data. Variable length.
Zero or more bytes of data as indicated by the Length. This field may contain one or more Options.
Read more about this topic: Internet Protocol Control Protocol
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—Isaac Newton (1642–1727)