AI296 Version 9.8x User’s Guide

IP Over X.25 Subnet Configuration: Configuration Overview

Configuration Overview

AI296 supports encapsulation of the IP protocol over X.25 (IXE) networks. The local AI296 wraps IP packets (either control or data packets) inside of X.25 frames and sends them across the X.25 network. The remote AI296 receives the X.25 frames and unwraps the IP packets.

To allow IP traffic to run over an X.25 network, the network must be configured to support IP over X.25 encapsulation. To do this, complete the following tasks:

zConfigure and verify the X.25 SVC links. Refer to section SVC Configuration Settings on page 6-90 for information about configuring X.25 SVC links.

zCreate IP subnets and IP over X.25 remote pairs.

zCreate IP static routing table entries (optional).

zReset AI296.

Before Configuration

In order for the TCP/IP stack to know where to route incoming packets, an appropriate subnet must be configured. IP addresses and subnets must be assigned to the local and remote sides of the X.25 link (also called "doorway"). X.121 addresses are then assigned to the local and remote sides. After this, a static route can be setup through the IXE link to the remote doorway IP address. Refer to the example in Figure 5-1 on page 5-2 for an illustration of how to configure IP over X.25.

 

Local AI296

 

 

 

 

 

 

Remote AI296

IP address: 198.127.1.196

 

 

IP address: 198.30.2.196

Subnet mask: 255.255.255.0

 

 

Subnet mask: 255.255.255.0

 

 

 

 

 

Link Numbers

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Local IXE doorway

 

11

 

 

 

 

 

Remote IXE doorway

 

 

address: 20.0.0.1

 

 

 

 

 

 

 

address: 20.0.0.2

 

 

 

 

 

 

 

 

 

 

 

Local IXE doorway

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remote IXE doorway

 

 

X.121 address:

 

 

 

 

 

 

X.121 address:

 

 

3035550005

 

 

 

 

 

 

6065550008

 

 

IXE subnet mask:

 

 

 

 

 

 

IXE subnet mask:

 

 

255.255.255.0

 

 

 

 

 

 

255.255.255.0

 

 

 

 

 

IP Tunnel

 

 

 

 

 

 

 

within X.25

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 5-1 IXE Example

5-2

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Kentrox AI296 manual Configuration Overview, Before Configuration