Nortel Networks NN46110-602 - Manual (Page 223)

Appendix D Configuring for interoperability 223
Nortel VPN Router Troubleshooting
Network addresses form the basis of the IPX internetwork addressing scheme for
sending packets between network segments. Every network segment of an
internetwork is assigned a unique network address by which routers forward
packets to their final destination network. On the VPN Router, all public
interfaces are treated as a single network segment with a unique network address.
A network address in the NetWare environment consists of eight hexadecimal
characters. In the example 0xnnnnnnnn, 0x indicates that this is a hexadecimal
number, and n is any hexadecimal character.
Socket numbers are the basis for an IPX intranode address (the address of an
individual entity within a node). They allow a process (for example, IPX Routing
Information Protocol [RIP] and Service Access Points [SAP]) to distinguish itself
to IPX. To communicate on the network, the process must request a socket
number. Any packets IPX receives addressed to that socket are then passed on to
the process within the node.
The VPN Router uses IPX RIP and SAP to dynamically learn and advertise IPX
routes and services. The VPN Router assigns IPX addresses to tunneled clients;
remote users cannot configure the IPX tunnel address for their systems.
The VPN Router does not forward IPX packets from a private nontunneled LAN
to another private nontunneled LAN, nor does it propagate routing or server tables
from a private nontunneled LAN to another private nontunneled LAN.
IPX client
On the PPTP client (for example, Microsoft Dial-Up Networking), you must
enable the dial-up networking IPX option. When you enable IPX, you can tunnel
using IPX, IP, or IPX and IP according to the dial-up networking selections.