组网:
某局点采用M9008作为LNS,LAC是运营商设备,终端通过4G拨号拨到LAC触发隧道建立,当前配置完之后,发现只有几个手机能拨号成功,其他手机都拨不成功,跟运营商确认,手机上不需要特殊配置,检查配置也没有发现异常。
关键配置;
l2tp-group 1 mode lns
allow l2tp virtual-template 1 remote UGW9811
tunnel name LNS
tunnel password cipher $c$3$dbzzl1ofX/7q9wGweAXPdImE4ydDzhHlhg==
#
l2tp enable
interface Virtual-Template1
ppp authentication-mode chap domain system
remote address pool aaa
ip address 172.16.0.1 255.255.0.0
收集正常手机拨号debug信息和不正常手机拨号debug对比:
查看debug对比发现,不成功的手机在lcp协商的时候失败了。
不正常的拨号:
*Mar 24 11:08:00:285 2020 H3C PPP/7/EXTERNAL_EVENT_1:
PPP External Event:
Virtual-Access1: PPP daemon receive interface up event!
*Mar 24 11:08:00:285 2020 H3C PPP/7/EXTERNAL_EVENT_1:
PPP External Event:
Virtual-Access1: PPP l2tp prenego begin!
*Mar 24 11:08:00:285 2020 H3C PPP/7/EXTERNAL_EVENT_1:
PPP External Event:
Virtual-Access1: LCP proxy negotiation for l2tp failed!
*Mar 24 11:08:00:285 2020 H3C PPP/7/FSM_EVENT_1:
PPP Event:
Virtual-Access1 LCP Close Event
State reqsent
正常的拨号:
*Mar 24 11:04:35:669 2020 H3C PPP/7/EXTERNAL_EVENT_0:
PPP External Event:
Virtual-Access0: PPP daemon receive interface up event!
*Mar 24 11:04:35:669 2020 H3C PPP/7/EXTERNAL_EVENT_0:
PPP External Event:
Virtual-Access0: PPP l2tp prenego begin!
*Mar 24 11:04:35:670 2020 H3C PPP/7/EXTERNAL_EVENT_0:
PPP External Event:
Virtual-Access0: PPP l2tp prenego chap begin!
*Mar 24 11:04:35:670 2020 H3C PPP/7/CHAP_EVENT_0:
PPP Event:
Virtual-Access0 CHAP Initial Event
State Initial
*Mar 24 11:04:35:670 2020 H3C PPP/7/EXTERNAL_EVENT_0:
PPP External Event:
Virtual-Access0: PPP l2tp prenego chap end!
增加以下命令后,修改为强制LCP认证之后,问题解决
<Sysname> system-view
[Sysname] l2tp-group 1 mode lns
[Sysname-l2tp1] mandatory-lcp
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