Panasonic NN46240-710 User Manual
Page 33
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Nortel Secure Router 8000 Series
Troubleshooting - VPN___________
1 L2TP troubleshooting
Item
Sub-item
Description
Bind the VPN
Bind the corresponding VPN in the VT 
view.
Configuring L2TP
Enable L2TP
L2TP can be configured only after L2TP 
is enabled.
The source interface
of the tunnel on the 
LAC side
You can specify the loopback interface, 
Ethernet interface, and GigabitEthernet 
interface as the source interface of the 
tunnel.
The name of the
tunnel
The name of the tunnel on the LAC side 
must be consistent with the name of the 
remote end to receive the tunnel on the 
LNS side.
The authentication of
the tunnel
The configuration for whether to enable 
tunnel authentication on the LAC side 
must be the same as that on the LNS side.
The password of the
authentication of the
tunnel
After tunnel authentication is enabled, the 
passwords on both the LAC and LNS ends 
must be consistent.
The list separator of
the user postfix
If you establish the connection with the 
L2TP through the domain, you need to run 
the l2tp domain command to configure 
the separator of the user postfix.
The static route on the 
LAC side
When the LNS side uses the IP address of 
the loopback interface as the IP address of 
the L2TP group, you must configure the 
route to be reachable to the LNS loopback 
interface on the LAC side.
The request for the 
connection with the 
L2TP allowed on the 
LNS side
If the number of the L2TP group is 1, you 
need not specify the remote name. If you 
specify the remote name in the L2TP
group 1 view, the L2TP group 1 does not 
work as the default L2TP group.
The IP address of the 
L2TP group bound on 
the LNS side
You can use the IP address of the Ethernet 
interface, GigabitEthernet interface, and 
loopback interface as the IP address of an 
L2TP group. After the loopback interface 
is bound, it cannot be used for other 
services.
The user
authentication on the
LNS side
After LCP renegotiation is configured on 
the LNS side, you need to configure the 
PPP authentication mode on the 
corresponding virtual interface template. 
Otherwise, the user cannot pass the 
authentication.
Issue 5.3 (19 January 2009)
Nortel Networks Inc.
1-13