FAQ-Why Does the Dial-up User Fail to Communicate with the Intranet User When the IP Addresses of the Network that the LNS Accesses Reside on the Same Network Segment as the IP Address that the LNS Assigns to the Dial-up User

Publication Date:  2015-07-02 Views:  225 Downloads:  0
Issue Description
Why Does the Dial-up User Fail to Communicate with the Intranet User When the IP Addresses of the Network that the LNS Accesses Reside on the Same Network Segment as the IP Address that the LNS Assigns to the Dial-up User?
Solution
On the interface (must be an Ethernet interface) connecting the LNS and the intranet, the ARP proxy (arp-proxy enable) and L2TP virtual forwarding (virtual-l2tpforward enable) functions must be configured. After the ARP proxy and L2TP virtual forwarding are configured, the intranet replies to the ARP request from the dial-up user on the same IP address network segment, and the learned MAC address is that of the interface with ARP proxy enabled on the LNS. The L2TP tunnel forwards packets to the peer end.

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