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x.25 connection to Mainframe

a.mountouris
Level 1
Level 1

Hello Forum,

I am not sure if this is the right forum to open this conversation or if I have to discuss this with the remote access forum.

We are trying to establish a connection between a AS/400 and an IBM 3745 through x.25 connection.

Currently the connection goes like:

{AS/400}--[modem]--x.25--[modem]--(router)--{FEP}

and the channel is PVC. The (router) is motorola.

We want to insert between AS/400 and modem a cisco

router so the connection will be like:

{AS/400}-(cisco)-[modem]-x.25-[modem]-(router)-{FEP}

So we have to configure two x25 serial interfaces on cisco router one pointing to AS/400 and the other to the opposite site. I am thinking of coding the following:

!

interface Serial0/0

description "Link to other site"

no ip address

encapsulation x25

no ip mroute-cache

x25 htc 16

x25 ips 256

x25 ops 256

x25 facility packetsize 1024 1024

bridge-group 1

!

!

interface Serial0/2

description "Link to AS400"

no ip address

encapsulation x25 dce

x25 htc 16

x25 ips 256

x25 ops 256

x25 facility packetsize 1024 1024

clockrate 9600

no cdp enable

bridge-group 1

!

bridge 1 protocol ieee

I have not entered anywhere the x.121 addresses. I suppose I have to configure the local x.121 address at AS/400 configuration.

What do you think of the following configuration?

How can I see if the connection is up?

2 Replies 2

smalkeric
Level 6
Level 6

You could try out with your configuration. It looks good to me. You could also refer to the following URL to get a better

understanding on how to configure cisco routers for X.25 connections. http://www.cisco.com/en/US/products/sw/iosswrel/ps1826/products_configuration_guide_chapter09186a00800d9bc8.html

I tried out the configuration and it worked! I forgot to define the x.25 routes. However, with the addition of the x25 route command it works just fine. The cisco router just switches the x25 packets from one interface to the other.

Anyway, thanks for the information Sam.

Review Cisco Networking for a $25 gift card