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Defining the Minimum L2TP Configuration
To define the minimum configuration for the Layer 2 Tunneling Protocol (L2TP), include at least the following statements at the [edit access] hierarchy level:
[edit access]
address-pool pool-name {address address-or-prefix;address-range low <lower-limit> high <upper-limit>;}
profile profile-name {authentication-order [ authentication-methods ];client client-name {chap-secret chap-secret;l2tp {interface-id interface-id;maximum-sessions-per-tunnel number;ppp-authentication (chap | pap);shared-secret shared-secret;}pap-password pap-password;ppp {framed-ip-address ip-address;framed-pool framed-pool;interface-id interface-id;primary-dns primary-dns;primary-wins primary-wins;secondary-dns secondary-dns;secondary-wins secondary-wins;}}}
radius-server server-address {accounting-port port-number;port port-number;retry attempts;secret password;}
 | Note: When the L2TP network server (LNS) is configured with RADIUS authentication, the default behavior is to accept the preferred RADIUS-assigned IP address. Previously, the default behavior was to accept and install the nonzero peer IP address received in the Internet Protocol Control Protocol (IPCP) configuration request packet. |
