Perle Systems 1700 manual IP Routing, IP Address / Size of Subnet Mask

Applications

IP Routing

An Ethernet IP router is used to intelligently route Internet Protocol (IP) traffic to another network. The networks may be connected across a WAN link (illustrated below) or two LANs connected to the same dual LAN P1730.

Router IP Address		Router IP Address
199.169.1.10	WAN connection	199.169.2.12

IP Network Address

199.169.1.0

Network #1

IP Network Address

199.169.2.0

Network #2

TCP/IP Network TCP/IP Network

Figure 2 -2 IP Networks Routed across a WAN link

IP routers forward IP frames based upon their IP destination address and an internal routing table. The router maintains the internal routing table with the connected network IP addresses and, for WAN link connections, the remote partner IP routers associated with those networks. When an IP frame is received, the destination IP address is examined and looked up in the routing table. In the case of a dual LAN router, if the destination IP address is on the other LAN, the packet is routed there. For WAN connections, if the destination IP network is found in the routing tables, the IP router sends the IP frame to the remote partner router that is connected to the appropriate remote IP network. If no explicit route entry is found in the routing table, the IP frame is sent to the Default Gateway. The Default Gateway may be learned from the LAN or may be set manually (see section 2.1.2.3).

To configure an router for IP routing between networks, the following parameters must be defined in the built-in menu system.

	1. IP Address
	Location: Main
	ªConfiguration
	ª LAN Set-up
	ª LAN IP Set-up
	ª IP Address / Size of Subnet Mask
	If this P1730 has the dual LAN option installed, you will first be asked which LAN to
	reference (1 or 2). Both LANs must have unique IP addresses to use IP routing.

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