Panasonic NN46240-710 - Manual (Page 26)

1 L2TP troubleshooting
Nortel Secure Router 8000 Series
_________ Troubleshooting - VPN
Item Sub-item Description
The list separator of the
user postfix
If you establish the connection with 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 is 1, you need not
specify the remote-name. If you specify the
remote name in the L2TP group 1 view, L2TP
group 1 does not work as the default L2TP
group.
The IP address of the
L2TP group bound on
the LNS side
The IP address of the Ethernet interface,
GigabitEthernet interface, and loopback
interface can be used 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 the LCP renegotiation is configured on
the LNS side, you need to configure the PPP
authentication mode on the correct virtual
interface template. Otherwise, the user cannot
pass the authentication.
Domain Generally, bind VTs and configure address
pools in the domain view when L2TP users
access Layer 3 VPN groups. In other cases,
bind VTs in the L2TP group view.
As an example for the configuration notes for the L2TP LNS, consider users in different
domains that access the VPN.
1. Configure the interface of the LNS and LAC Ethernet2/0/0 and the address.
[Nortel] interface ethernet2/0/0
[Nortel-Ethernet2/0/0] ip address 10.1.1.3 255.255.255.0
[Nortel-Ethernet2/0/0] quit
2. Create a virtual template (VT) required by the L2TP group.
[Nortel] interface virtual-template 1
[Nortel-Virtual-Template1] ip address 35.1.1.1 255.255.255.0
[Nortel-Virtual-Template1] mtu 1450
[Nortel-Virtual-Template1] ppp authentication-mode pap
[Nortel-Virtual-Template1] quit
The VT executes the LCP and PAP negotiation with the user.
3. Configure the loopback interface required by the L2TP group.
[Nortel] interface LoopBack 0
1-6 Nortel Networks Inc. Issue 5.3 (19 January 2009)