2.2.1.1 L2TP AV Pair: Microsoft Vendor-specific Correlation ID Type (0x01)
This option is sent in ICRQ control messages so that any tracing application is able to correlate the messages pertaining to a particular tunnel context on the LAC and LNS.
|
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
2 |
|
|
|
|
|
|
|
|
|
3 |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
M |
H |
rsvd |
Length |
Vendor ID |
|||||||||||||||||||||||||||
|
Attribute type |
Attribute value (16 bytes) |
||||||||||||||||||||||||||||||
|
... |
|||||||||||||||||||||||||||||||
|
... |
|||||||||||||||||||||||||||||||
|
... |
|||||||||||||||||||||||||||||||
M (1 bit): The Mandatory (M) bit. MUST be set to 0.
H (1 bit): The Hidden (H) bit. MUST be set to 0.
rsvd (4 bits): Reserved bits. MUST be set to 0.
Length (10 bits): MUST be set to 22.
Vendor ID (2 bytes): MUST be set to 0x137.
Attribute type (2 bytes): MUST be set to 0x01.
Attribute value (16 bytes): MUST be a 16-byte GUID, as specified in [MS-DTYP] section 2.3.4.2. This SHOULD be unique for every ICRQ request on an LAC/LNS combination.