L2TP Message Types

• 1 - SCCRQ - Start Control Connection ReQuest

• 2 - SCCRP - Start Control Connection RePly

• 3 - SCCCN - Start Connection Control CoNnected

• 4 - StopCCN - Stop Control Connection Notification

• 6 - HELLO - HELLO

• 7 - OCRQ - Outgoing Call ReQuest

• 8 - OCRP - Outgoing Call RePly

• 9 - OCCN - Outgoing Call CoNnected

• 10 - ICRQ - Incoming Call ReQuest

• 11 - ICRP - Incoming Call RePly

• 12 - ICCN - Incoming Call CoNnected

• 14 - CDN - Call Disconnect Notification

• 15 - WEN - Wan Error Notify

• 16 - SLI - Set Link Info

Notes: