259
Task Remarks
Configuring an LAC to establish an
L2TP tunnel
• Required in
LAC-auto-initiated mode.
• No need to configure in
NAS-initiated mode.
Configuring L2TP connection
parameters
Configuring L2TP tunnel
authentication
Optional.
Setting the hello interval
Enabling tunnel flow control
Disconnecting tunnels by force
To configure a device as an LNS in NAS-initiated, client-initiated, or LAC-auto-initiated mode,
complete the following tasks:
Task Remarks
Configuring basic L2TP
capabilities
Enable L2TP
Required.
Create an L2TP group
Specify the local name of the tunnel
Configuring an LNS
Creating a VT interface
Req
uired.
Configuring the local address and
the address pool for allocation
Required.
Configuring an LNS to grant certain
L2TP tunneling requests
Required.
Configuring user authentication on
an LNS
Optional.
Configuring AAA authentication for
VPN users on an LNS
Optional.
Enabling L2TP for VPNs
Optional.
Configuring the LNS to support IMSI
or SN in PPP LCP negotiation
Optional.
Configuring L2TP connection
parameters
Configuring L2TP tunnel
authentication
Optional.
Setting the hello interval
Enabling tunnel flow control
Disconnecting tunnels by force
Configuring L2TP-based EAD
Optional.
Configuring basic L2TP capabilities
An L2TP group is intended to represent a group of parameters and corresponds to one VPN user or
one group of VPN users. This enables not only flexible L2TP configuration on devices, but also
one-to-one and one-to-many networking applications for LACs and LNSs. An L2TP group only has
local significance. However, you must make sure that the relevant settings of the L2TP groups on the