2 vpdn troubleshooting on the l2tp, 1 networking environment, 2 vpdn troubleshooting on the l2tp -5 – Panasonic NN46240-710 User Manual
Page 24: 1 networking environment -5, 1 l2tp overview
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1 L2TP troubleshooting
Nortel Secure Router 8000 Series
_________ Troubleshooting - VPN
10. LNS sends an access request to the RADIUS server for authentication.
11. The RADIUS server reauthenticates this access request and sends back a response if
authentication succeeds.
12. If local mandatory CHAP authentication is configured at LNS, LNS authenticates the
VPN user by sending a challenge. The VPN user at the PC side sends back a response.
13. LNS resends this access request to the RADIUS server for authentication.
14. The RADIUS server reauthenticates this access request and sends back a response if
authentication is successful.
15. After all authentications pass, the VPN user can use the internal resources of the
enterprise.
1.2 VPDN troubleshooting on the L2TP
The section describes the following topics:
•
•
•
1.2.1 Networking environment
Figure 1-3 shows the networking of the L2TP tunnel.
Figure 1-3 Networking of the L2TP tunnel
RADIUS Server
RADIUS Server
PC
Router A works on the LAC side and Router B works on the LNS side. The user from the
LAC side sends the request for connection to the LNS side. This achieves the interconnection
with other PCs.
1-4
Nortel Networks Inc.
Issue 5.3 (19 January 2009)