| SPX, Sequenced Packet Exchange |
| Description | Glossary | RFCs | Publications | Obsolete RFCs |
| Protocol suite: | Novell NetWare. |
| Type: | Transport layer protocol. |
| MAC header | IPX header | SPX header | Data ::: |
SPX 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Connection control | Data stream type | Source connection ID | |||||||||||||||||||||||||||||
| Destination connection ID | Sequence number | ||||||||||||||||||||||||||||||
| Acknowledgement Number | Allocation number | ||||||||||||||||||||||||||||||
| Data ::: | |||||||||||||||||||||||||||||||
Connection control. 8 bits.
| Value | Description |
|---|---|
| 0x10 | End of message. |
| 0x20 | Attention. |
| 0x40 | Acknowledgement required. |
| 0x80 | System packet. |
Data stream type. 8 bits.
| Value | Description |
|---|---|
| 0xFE | End of connection. This is the last message for this connection. |
| 0xFF | End of connection acknowledgement. |
Source connection ID. 16 bits.
Destination connection ID. 16 bits.
Sequence number.
16 bits.
An incremental count of the number of SPX packets transmitted by the sender.
Acknowledgement number.
16 bits.
The sequence number to be expected in the next SPX packet.
Allocation number.
16 bits.
The number of outstanding receive buffers available.
Data.
0 to 534 bytes.
If this is not a system packet, then this field may contain data up to 534 bytes.
RFCs:
[RFC 1412] Telnet Authentication: SPX.
Chappell, Laura and Dan Hakes. Novell's Guide to NetWare LAN Analysis (First Edition). Sybex Inc. and Novell Press, 1993.
Chappell, Laura and Dan Hakes. Novell's Guide to NetWare LAN Analysis (Second Edition). Sybex Inc. and Novell Press, 1994.
| Description | Glossary | RFCs | Publications | Obsolete RFCs |