【正文】 ll 11564 recv ICRP in state 4 from Call 0*Jun 29 16:10:27:769 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 restarted the Hello timer (60 seconds)*Jun 29 16:10:27:870 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Checked ICRP MSG TYPE = 11*Jun 29 16:10:27:971 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Parse AVP remote call ID: 13787*Jun 29 16:10:28:82 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Message Type: INCOMING_CALL_CONNECTED*Jun 29 16:10:28:182 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Tx connect speed: 0*Jun 29 16:10:28:283 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Framing type : 3*Jun 29 16:10:28:434 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Initial received LCP options*Jun 29 16:10:28:535 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Last sent LCP options*Jun 29 16:10:28:636 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Last received LCP options*Jun 29 16:10:28:737 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Proxy authentication type : 2*Jun 29 16:10:28:837 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Proxy authentication name : *Jun 29 16:10:28:938 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Proxy authentication challenge*Jun 29 16:10:29:39 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Proxy authentication ID : 1*Jun 29 16:10:29:150 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Parse AVP Proxy authenticate response:95 01 9b 56 4e 1b 7b 26 2a ee 75 3a 34 24 d7 a9 *Jun 29 16:10:29:251 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Proxy private group number : 0*Jun 29 16:10:29:351 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Rx connect speed: 0*Jun 29 16:10:29:452 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Call 11564 sent a ICCN message to remote Call 13787*Jun 29 16:10:29:503 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 recv ctrl message and restarted Hello timer.. . . ..學(xué)習(xí)參考*Jun 29 16:10:29:603 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Received message type: 16*Jun 29 16:10:29:754 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Board 0 recv from SOCK call ID=11564 tunnel ID=1 MsgType = 16 Length = 36*Jun 29 16:10:29:855 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Proc a control message from the peer: type=16, len = 36*Jun 29 16:10:29:956 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0*Jun 29 16:10:30:107 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0*Jun 29 16:10:30:218 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0*Jun 29 16:10:30:319 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0*Jun 29 16:10:30:420 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0*Jun 29 16:10:30:520 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0*Jun 29 16:10:30:621 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0*Jun 29 16:10:33:528 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0RTARTA*Jun 29 16:10:43:604 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0RTA*Jun 29 16:10:53:681 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0斷開連接，觀察 debugging 信息：RTA*Jun 29 16:10:56:752 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc peer data. Result 0%Jun 29 16:10:56:781 2022 RTA IFNET/4/UPDOWN: Line protocol on the interface VirtualTemplate0:0 is DOWN *Jun 29 16:10:56:782 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: CALL 11564 DOWN on interface: VirtualTemplate0:0*Jun 29 16:10:56:783 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc l2tp down msg, call in the state 9*Jun 29 16:10:56:783 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Message Type: CALL_DISCONNECT_NOTIFY*Jun 29 16:10:56:784 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Result code: LOSS_OF_CARRIER*Jun 29 16:10:56:784 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Assigned call ID: 11564*Jun 29 16:10:56:784 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Call 11564 sent a CDN message*Jun 29 16:10:56:784 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Cleared the data structure of call 11564 *Jun 29 16:10:56:881 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Proc call ID = 11564 Down*Jun 29 16:10:56:982 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Disabled L2TP successfully on interface 3145728*Jun 29 16:10:57:82 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 recv ctrl message and restarted Hello timer*Jun 29 16:10:57:183 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Received message type: 39856*Jun 29 16:10:57:294 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Board 0 recv from SOCK call ID=0 tunnel ID=1 Length = 12*Jun 29 16:10:57:395 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Proc peer control len = 12RTARTA*Jun 29 16:11:23:524 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Hello timer of tunnel 1 expired in 60 seconds*Jun 29 16:11:23:524 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Tunnel 1 sent StopCCN to Tunnel 1*Jun 29 16:11:23:525 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Message Type: STOP_CONTROL_CONNECTION_NOTIFICATION*Jun 29 16:11:23:525 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Assigned Tunnel ID: 1*Jun 29 16:11:23:525 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Put AVP Result code: LOSS_OF_CARRIER*Jun 29 16:11:23:525 2022 RTA L2TP/7/L2TDBG: L2TP_EVENT: Cleared Tunnel remote ID:1, local ID:1.. . . ..學(xué)習(xí)參考*Jun 29 16:11:23:770 2022 RTA L2TP/7/L2TDBG: L2TP_CONTROL: Received ctrl message is ZLB, discard itRTA這樣就可以了解呼叫中 L2TP 的主要信息交換過程。步驟八：觀察隧道建立過程在 RTA 和 RTB 上用 display 命令查看相關(guān)信息，可見 RTA 與 RTB 之間建立了一個 L2TP 隧道，其中有一個 L2TP 會話：[RTA]display l2tp tunnel Total tunnel = 1 LocalTID RemoteTID RemoteAddress Port Sessions RemoteName 1 1 1701 1 LNS[RTA]display l2tp session Total session = 1 LocalSID RemoteSID LocalTID 11984 3303 1RTBdisplay l2tp tunnel Total tunnel = 1 LocalTID RemoteTID RemoteAddress Port Sessions RemoteName 1 1