| GDOI, Group Domain of Interpretation |
|
|
Description | Glossary | RFCs | Publications | Obsolete RFCs |
| Protocol suite: | TCP/IP. |
| Protocol type: | Application layer protocol. |
| Base protocol: | ISAKMP, Internet Security Association and Key Management Protocol. |
| Ports: | 848 (UDP). |
| URI: | |
| MIME subtype: | |
| SNMP MIBs: | |
| Working groups: | |
| Links: | IANA: ISAKMP identifiers. |
Unlike ISAKMP or IKE, the cookie pair in the GDOI header is completely determined by the GCKS. The cookie pair in the GDOI ISAKMP header identifies the Rekey SA to differentiate the secure groups managed by a GCKS. GDOI uses the cookie fields as an SPI.
| MAC header | IP header | UDP header | GDOI header | Data ::: |
GDOI 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Initiator cookie - | |||||||||||||||||||||||||||||||
| Responder cookie - | |||||||||||||||||||||||||||||||
| Next payload | Mjr version | Mnr version | Exchange type | Flags | |||||||||||||||||||||||||||
| Message ID | |||||||||||||||||||||||||||||||
| Length | |||||||||||||||||||||||||||||||
Initiator cookie. 8 bytes.
Responder cookie. 8 bytes.
Next payload.
8 bits.
Indicates the type of the first payload in the message.
Mjr version.
4 bits.
The major version of the protocol in use.
Mnr version.
4 bits.
The minor version of the protocol in use.
Exchange type.
8 bits.
Indicates the type of exchange being used.
This dictates the message and payload orderings in the ISAKMP exchanges.
Flags.
8 bits.
Indicates the options that are set for the exchange.
Message ID.
4 bytes.
A unique value used to identify the protocol state during Phase 2 negotiations.
It is randomly generated by the initiator of the Phase 2 negotiation.
Length.
4 bytes.
The total length of the GDOI header and the encapsulated payloads in bytes.
RFCs:
[RFC 3547] The Group Domain of Interpretation.
|
|
Description | Glossary | RFCs | Publications | Obsolete RFCs |