OSINLCP, PPP OSI Network Layer Control Protocol

Protocol suite:	PPP.
Protocol type:	PPP network control protocol.
PPP protocol:	0x8023.
MIME subtype:
SNMP MIBs:
Working groups:	pppext, Point-to-Point Protocol Extensions.
Links:

The OSINLCP protocol is used for establishing and configuring the OSI Network Layer Protocol over PPP.

RFC 1377.

OSINLCP is responsible for configuring, enabling, and disabling the OSI protocol modules on both ends of the point-to-point link. OSINLCP uses the same packet exchange machanism as the Link Control Protocol (LCP). OSINLCP packets may not be exchanged until PPP has reached the Network-Layer Protocol phase. OSINLCP packets received before this phase is reached should be silently discarded.

Before any Network Protocol Data Units (NPDUs) may be communicated, PPP must reach the Network-Layer Protocol phase, and the OSI Network Layer Control Protocol must reach the Opened state.

PPP header

OSINLCP header

Data :::

OSINLCP 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 field. This field may contain one or more OSINLCP Options.

OSINLCP Configuration Option.

00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15
Option								Length
Data :::

Option. 8 bits.

Option	Length	Description
1	3	Align-NPDU.

Length. 8 bits.

Data. Variable length.

Glossary:

NLPID, Network Layer Protocol Identifier.

NPDU, Network Protocol Data Unit.

RFCs:

[RFC 1377] The PPP OSI Network Layer Control Protocol (OSINLCP).

Publications:

Obsolete RFCs: