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L2tp连接不上

L2TP VPN

2024-02-26提问

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不完美克星

不完美克星二段

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问题描述：

1、配置案例：https://www.h3c.com/cn/d_202310/1951320_30005_0.htm#_Toc148622654

2、如图，配置完成后尝试使用inode登录，结果一直连接登录不上。

3、这是debug的结果，求解谢谢！

*Feb 26 16:18:06:036 2024 LAC L2TPV2/7/CONTROL-PKT:

Received Hello packet from port 1701 (length=20, Ns=1, Nr=1). Packet content:

c8 02 00 14 00 00 00 00 00 01 00 01 80 08 00 00

00 00 00 06

*Feb 26 16:18:06:036 2024 LAC L2TPV2/7/ERROR:

Received invalid packet from port 1701, and dropped it.

*Feb 26 16:18:09:035 2024 LAC L2TPV2/7/ERROR:

The packet is invalid, because it is not a SCCRQ or StopCCN packet but the tunnel ID in the packet header is invalid.

*Feb 26 16:18:09:035 2024 LAC L2TPV2/7/CONTROL-PKT:

Received Hello packet from port 1701 (length=20, Ns=1, Nr=1). Packet content:

c8 02 00 14 00 00 00 00 00 01 00 01 80 08 00 00

00 00 00 06

*Feb 26 16:18:09:035 2024 LAC L2TPV2/7/ERROR:

Received invalid packet from port 1701, and dropped it.

*Feb 26 16:18:12:037 2024 LAC L2TPV2/7/ERROR:

The packet is invalid, because it is not a SCCRQ or StopCCN packet but the tunnel ID in the packet header is invalid.

*Feb 26 16:18:12:037 2024 LAC L2TPV2/7/CONTROL-PKT:

Received Hello packet from port 1701 (length=20, Ns=1, Nr=1). Packet content:

c8 02 00 14 00 00 00 00 00 01 00 01 80 08 00 00

00 00 00 06

最佳答案

zhiliao_p9QVR

zhiliao_p9QVR 九段

粉丝：29人关注：2人

这个是终端发送了终止链接的报文

3 个回答

按时间按赞数

无名之辈

无名之辈九段

粉丝：226人关注：0人

您好，Received CDN packet from port 1701 (TunnelID=4621, length=38, Ns=4, Nr=2). Packet content:

LNS侧收到了拆除VA口通知，然后拆除，请排查LAC侧为什么发送该报文

老师，您看下我下面的评论，加了拓扑和脚本。

不完美克星发表时间：2024-02-26

Lab

Lab 七段

粉丝：3人关注：13人

贴分配置，控制连接都没有发起

老师，您看下我下面的评论，加了拓扑和脚本。

不完美克星发表时间：2024-02-26

不完美克星

不完美克星二段

粉丝：0人关注：1人

1、拓扑

2、配置

<LAC>dis cu
#
interface Virtual-Template1
ppp authentication-mode chap domain system
#
interface GigabitEthernet0/0/0
port link-mode route
combo enable copper
ip address 192.168.56.111 255.255.255.0
#
interface GigabitEthernet0/0/1
port link-mode route
combo enable copper
ip address 1.1.2.1 255.255.255.0
pppoe-server bind virtual-template 1
#
ip route-static 0.0.0.0 0 1.1.2.2
#
domain name system
authentication ppp local
#
domain default enable system
#
local-user vpnuser class network
password cipher $c$3$jfXFSfdG+XB0RraBb2CsEaEoOGBpn3oeVw==
service-type ppp
#
l2tp-group 1 mode lac
lns-ip 1.1.2.2
user fullusername vpnuser
tunnel name LAC
tunnel password cipher $c$3$Oci546bblkK68dwtOqr7npzuJm4ZFVuq9Q==
#
l2tp enable
#
return

<LNS>dis cu
#
ip pool aaa 192.168.0.10 192.168.0.20
ip pool aaa gateway 192.168.0.1
#
interface Virtual-Template1
ppp authentication-mode chap domain system
remote address pool aaa
ip address 192.168.0.1 255.255.255.0
#
interface GigabitEthernet1/0/1
port link-mode route
combo enable copper
ip address 1.1.2.2 255.255.255.0
#
security-zone name Trust
import interface GigabitEthernet1/0/2
#
security-zone name Untrust
import interface GigabitEthernet1/0/1
import interface Virtual-Template1
#
ip route-static 192.168.56.0 24 192.168.0.10
#
domain system
authentication ppp local
#
local-user vpnuser class network
password cipher $c$3$4QWgHLkJ7ygKQY9TXbNf3S6kXWRu+CpKIw==
service-type ppp
authorization-attribute user-role network-operator
#
l2tp-group 1 mode lns
allow l2tp virtual-template 1 remote LAC
tunnel name LNS
tunnel password cipher $c$3$NxXXAlJ59gb2Hb/u3MP3MUKzmAuEdz15AA==
#
l2tp enable
#
security-policy ip
rule 0 name test
action pass
#
return