| DNCP, PPP DECnet Phase IV Control Protocol |
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Description | Glossary | RFCs | Publications | Obsolete RFCs |
| Protocol suite: | PPP. |
| Protocol type: | PPP network control protocol. |
| PPP protocol: | 0x8027. |
| SNMP MIBs: | |
| Working groups: | pppext, Point-to-Point Protocol Extensions. |
| Links: |
The DNCP protocol is used for establishing and configuring Digital's DNA Phase IV Routing protocol (DECnet Phase IV) over PPP.
This document defines the Network Control Protocol (NCP) for establishing and configuring Digital's DNA Phase IV Routing protocol (DECnet Phase IV) over PPP. This document applies only to DNA Phase IV Routing messages (both data and control), and not to other DNA Phase IV protocols (MOP, LAT, etc).
DNCP is responsible for configuring, enabling, and disabling the DNA Phase IV Routing protocol modules on both ends of the point-to-point link. DNCP uses the same packet exchange mechanism as the Link Control Protocol (LCP). DNCP packets may not be exchanged until PPP has reached the Network-Layer Protocol phase. DNCP packets received before this phase is reached should be silently discarded.
| PPP header | DNCP header | Data ::: |
DNCP 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 |
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| 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 field.
This field may contain one or more Options.
DNA Phase IV Routing.
(RFC 1762)
The Phase IV Digital Network Architecture (DNA) Routing protocol is a network layer protocol providing services similar to that of DoD IP.
It routes messages in Phase IV DECnet networks and manages the packet flow.
RFCs:
[RFC 1762] The PPP DECnet Phase IV Control Protocol (DNCP).
[RFC 1376] The PPP DECnet Phase IV Control Protocol (DNCP).
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Description | Glossary | RFCs | Publications | Obsolete RFCs |