IP Addressing

1 Networking Overview

PPP with Ethernet Connections

The diagram below shows two interconnected (sub)networks. There are three switches in a DCS network with a ppp signaling connection between switches A & B and an ethernet signaling connection between switch A and the adjunct. Switches A

&B and the adjunct are on one (sub)network and switch C is on another (sub)network.

Switch A acts as a gateway to convert between the two signaling protocols. PPP data modules are administered between nodes 1 & 3 on switches A & B and ethernet data modules are administered on switches A & C for the C-LAN ethernet port interfaces to their LANs. With these connections, switch A can communicate with switch B and with the adjunct without using the IP Routing screen to administer explicit IP routes.

Normally, node 5 would be defined as the default gateway for node 2 on the IP Interfaces screen, which would enable switch A to communicate with switch C without an explicit IP route defined. However, if node 5 is not assigned as the default gateway for node 2, switch A needs an IP route to communicate with switch C because these switches are on different (sub)networks. Similarly, node 6 would normally be defined as the default gateway for node 7; if not, switch C needs an IP route to communicate with switch A.

Also, switch B needs an IP route to communicate with switch C because B is connected to A via ppp and there are intermediate nodes between B & C.

 

3

SW B

 

DCS Signaling over PPP

 

 

DS1

DCS Signaling over Ethernet / Internet

 

 

 

 

 

 

 

C-LAN

 

 

 

 

 

 

PPP

 

 

 

 

 

SW C

 

 

 

 

 

 

DS1

SW A

 

 

 

 

 

 

 

 

Network 1

Network 2

7

DS1 1

 

 

C-LAN

 

 

 

 

 

 

C-LAN

 

 

 

 

 

LAN

 

2

Ethernet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LAN

 

5

Wan

6

Ethernet

 

 

 

or

 

 

 

 

 

 

 

Intranet

 

 

 

 

4

 

 

 

 

 

 

Adjunct

 

 

 

 

 

 

 

Administration for Network Connectivity

26

CID: 77730

555-233-504 — Issue 1 — April 2000

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Image 46
Lucent Technologies Release 8.2 manual DS1, PPP with Ethernet Connections