IP Addressing

1 Networking Overview

IP Route Examples

PPP Connections

The diagram below shows three switches in a DCS network with PPP signaling connections between switches A & B and between switches A & C. All nodes in this diagram are C-LAN ports. PPP data modules are administered between nodes 1 & 2 on switches A & B, and between nodes 3 & 4 on switches A & C. With these connections, switch A can communicate with switches B and C without using the IP Routing screen to administer explicit host IP routes. However, switches B and C need host IP routes to communicate with each other because they are not directly connected.

 

SW B

 

 

DS1

 

 

DCS Signaling over PPP

 

 

1 C-LAN

 

 

ppp

SW C

 

DS1

 

 

 

4

C-LAN

SW A

ppp

 

 

 

DS1

 

 

2

 

 

C-LAN 3

 

 

The IP routes needed between nodes for this example are listed in the following table. The Destination Node and Gateway Node columns in the table show the nodes that you would enter on the IP Routing screen to administer a host IP route. On the IP Routing screen, you would enter the node names assigned on the Node Names screen for these nodes.

Switch

Node

Destination

Gateway

Route

Comments

Connections

Node

Type

 

 

 

Node

 

 

 

 

 

 

host

IP route needed

B

1 —> 4

4

2

 

because there is an

 

intermediate node

 

 

 

 

 

 

 

 

 

 

between nodes 1 & 4.

 

 

 

 

 

 

 

 

 

 

host

IP route needed

C

4 —> 1

1

3

 

because there is an

 

intermediate node

 

 

 

 

 

 

 

 

 

 

between nodes 4 & 1.

 

 

 

 

 

 

Note: (1) The PPP data modules on switches B and C for the connections to A must be enabled before the IP routes can be administered.

Note: (2) Nodes 2 and 3 in this example are two ports on the same C-LAN board. Messages from node 1 destined for node 4 arrive at node 2; the C-LAN ARP software routes the messages to node 4 through node 3.

Administration for Network Connectivity

555-233-504 — Issue 1 — April 2000

CID: 77730

25

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Image 45
Lucent Technologies Release 8.2 manual DS1, Lan, Switch Node Destination Gateway Route Comments Connections