Applications
PPP Link Configuration Overview
A PPP (Point to Point Protocol) connection between two routers may use a number of Network Control Protocols (NCP) for communication. An IP router connection will use the Internet Protocol Control Protocol (IPCP) NCP for all IP communications. An IPX router connection will use the Internet Packet Exchange Control Protocol (IPXCP) NCP for all IPX communications.
In order to establish an IPCP or IPXCP link connection between two
PPProuters, either a numbered link or an unnumbered link connection must be established. The two types of link connections are available to allow for greater flexibility between vendors products.
Numbered Links
A numbered link assigns a network address (either IP or IPX) to both ends of the WAN connection. In a numbered link configuration, the WAN connection may be viewed as another LAN network with the two PPP routers simply routing information between their local LANs and the common connected WAN network.
Because the WAN is considered to be a separate network, each of the stations on that network must be assigned a network address. If a numbered IP link is to be established, then each WAN interface must be assigned an IP address on a unique IP network. The WAN IP network address must be different than the two existing networks that are being connected together with the PPP routers.
If a numbered IPX link is to be established, then each WAN interface must be assigned an IPX node address on a unique IPX network number. The WAN IPX network address must be different than the two existing networks that are being connected together with the PPP routers.
The IP address of the local WAN link is defined as the Local IP Address within the remote site profile settings. The IP address of the WAN link of the remote PPP router is defined as the Peer IP Address within the remote site profile settings. The WAN IP network number is defined by defining a subnet size to use when defining the local IP address. The size of the subnet will determine the IP network number used.
The IPX node address of the local WAN link is defined as the Local IPX Node within the remote site profile settings. The IP address of the WAN link of the remote PPP router is defined as the Peer IPX Node within the
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