L2TP拨号失败

LAC是客户的设备，没有权限登陆。LNS是我们华三的防火墙F5000-C。

安全策略全放通，L2TP拨号不成功，以下是debug信息;

<H3C>*Jul  2 11:50:04:219 2019 H3C IPFW/7/IPFW_PACKET: -COntext=1;

Delivering, interface = GigabitEthernet1/0/3

version = 4, headlen = 20, tos = 252

pktlen = 131, pktid = 51089, offset = 0, ttl = 250, protocol = 17

checksum = 20076, s = 192.20.0.9, d = 192.20.41.62

channelID = 0, vpn-InstanceIn = 0, vpn-InstanceOut = 0.

prompt: Forwarding IP packet to upper layer.

Payload: UDP

  source port = 1701, destination port = 1701

  checksum = 0x0000, length = 111.

*Jul  2 11:50:04:221 2019 H3C L2TPV2/7/CONTROL-PKT: -COntext=1;

 Received SCCRQ packet from port 1701 (length=103, Ns=0, Nr=0). Packet content:

 c8 02 00 67  00 00 00 00  00 00 00 00  80 08 00 00

 00 00 00 01  80 08 00 00  00 02 01 00  80 0f 00 00

 00 07 67 7a  6d 32 6d 6c  32 74 70 00  0c 00 00 00

 08 48 55 41  57 45 49 80  0a 00 00 00  03 00 00 00

 03 80 08 00  00 00 09 b1  8e 80 08 00  00 00 0a 00

 40 80 16 00  00 00 0b 26  6c cd 54 81  92 76 90 af

 10 9d 6c e7  f7 72 42

*Jul  2 11:50:04:222 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 Parsed Message-Type AVP: 1.

*Jul  2 11:50:04:222 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 Parsed Protocol-Version AVP. Version=1, Revision=0.

*Jul  2 11:50:04:223 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 Parsed Host-Name AVP: gzm2ml2tp.

*Jul  2 11:50:04:223 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 Parsed Vendor-Name AVP: HUAWEI.

*Jul  2 11:50:04:224 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 Parsed Framing-Capabilities AVP: 3.

*Jul  2 11:50:04:224 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 Parsed Assigned-Tunnel-ID AVP: 45454.

*Jul  2 11:50:04:224 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 Parsed Receive-Window-Size AVP: 64.

*Jul  2 11:50:04:225 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 Parsed Challenge AVP: 26 6c cd 54 81 92 76 90 af 10 9d 6c e7 f7 72 42

*Jul  2 11:50:04:225 2019 H3C L2TPV2/7/CONTROL-PKT: -COntext=1;

 Encapsulated Message-Type AVP:

 80 08 00 00  00 00 00 02

*Jul  2 11:50:04:226 2019 H3C L2TPV2/7/CONTROL-PKT: -COntext=1;

 Encapsulated Protocol-Version AVP:

 80 08 00 00  00 02 01 00

*Jul  2 11:50:04:227 2019 H3C L2TPV2/7/CONTROL-PKT: -COntext=1;

 Encapsulated Host-Name AVP:

 80 09 00 00  00 07 48 33  43

*Jul  2 11:50:04:227 2019 H3C L2TPV2/7/CONTROL-PKT: -COntext=1;

 Encapsulated Framing-Capabilities AVP:

 80 0a 00 00  00 03 00 00  00 00

*Jul  2 11:50:04:228 2019 H3C L2TPV2/7/CONTROL-PKT: -COntext=1;

 Encapsulated Assigned-Tunnel-ID AVP:

 80 08 00 00  00 09 4f bf

*Jul  2 11:50:04:229 2019 H3C L2TPV2/7/CONTROL-PKT: -COntext=1;

 Encapsulated Bearer-Capabilities AVP:

 80 0a 00 00  00 04 00 00  00 03

*Jul  2 11:50:04:229 2019 H3C L2TPV2/7/CONTROL-PKT: -COntext=1;

 Encapsulated Receive-Window-Size AVP:

 80 08 00 00  00 0a 04 00

*Jul  2 11:50:04:230 2019 H3C L2TPV2/7/CONTROL-PKT: -COntext=1;

 Encapsulated Challenge AVP:

 80 16 00 00  00 0b c1 66  dc 5b 0e b4  01 ef 4a 1b

 57 10 29 29  a2 d9

*Jul  2 11:50:04:232 2019 H3C L2TPV2/7/CONTROL-PKT: -COntext=1;

 Encapsulated Challenge-Response AVP:

 80 16 00 00  00 0d e9 e0  0c 14 46 26  50 55 f6 57

 bb b2 58 70  3c f7

*Jul  2 11:50:04:233 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 TunnelID=20415: Processed SCCRQ packet in Idle state, sent SCCRP packet and changed the tunnel state to Wait-connect.

*Jul  2 11:50:04:237 2019 H3C IPFW/7/IPFW_PACKET: -COntext=1;

Delivering, interface = GigabitEthernet1/0/3

version = 4, headlen = 20, tos = 252

pktlen = 66, pktid = 51090, offset = 0, ttl = 250, protocol = 17

checksum = 20140, s = 192.20.0.9, d = 192.20.41.62

channelID = 0, vpn-InstanceIn = 0, vpn-InstanceOut = 0.

prompt: Forwarding IP packet to upper layer.

Payload: UDP

  source port = 1701, destination port = 1701

  checksum = 0x0000, length = 46.

*Jul  2 11:50:04:238 2019 H3C L2TPV2/7/CONTROL-PKT: -COntext=1;

 Received StopCCN packet from port 1701 (TunnelID=20415, length=38, Ns=1, Nr=1). Packet content:

 c8 02 00 26  4f bf 00 00  00 01 00 01  80 08 00 00

 00 00 00 04  80 08 00 00  00 09 b1 8e  80 0a 00 00

 00 01 00 02  00 00

*Jul  2 11:50:04:239 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 Parsed Message-Type AVP: 4.

*Jul  2 11:50:04:239 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 Parsed Assigned-Tunnel-ID AVP: 45454.

*Jul  2 11:50:04:239 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 Parsed Result-Code AVP. Result-Code=2, Error-Code=0, Error-Message="".

*Jul  2 11:50:04:240 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 TunnelID=20415: Processed StopCCN packet in Wait-connect state, and changed the tunnel state to Stopping.

*Jul  2 11:50:04:475 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 TunnelID=20415: Delay-ACK timer expired, received duplicate Hello packet for 0 times and sent ZLB-ACK packet for 1 times. Ns=1, Nr=2.

*Jul  2 11:50:35:275 2019 H3C L2TPV2/7/EVENT: -COntext=1;

 TunnelID=20415: Delay-Cleanup timer expired and deleted the local tunnel.