[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

Conference ozrock::x25_osf

Title:Proudly built by the engineers of NaC Australia
Moderator:DELNI::MUGGERIDGE
Created:Tue Oct 13 1992
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:908
Total number of notes:3829

903.0. "X25 Relay with Sub Address filtering ?" by BROUGH::DAVIES (Hype is a 4 letter word !) Sun May 18 1997 22:13

Hi
	I'm working on a system where we use a Unix system running X.25 as a 
gateway system to two others. I have set this system up as a Relay node
and all works ok. There is one relay in each direction. The incoming (from 
PSDN) has an output that points to an LLC2 DTE class that has two DTE's that 
over LLC2 to the target Unix systems.

I need a bit of help in adding some functionality to this config.

The relay as setup is ok but the customer wants to have additional control
over which relay destination they goto. This is to be done with a sub address
and thay also want the normal relay to operate if there is no sub address
match.

I assume that it is correct to use an X25 Access Filter in some way but I am 
unsure where to put it and also how to specify the sub address range. The docs
say the the sub address parameter on X25 access filters is being 'retired'. How
can you specify this ?

Basic Structure

PSDN--DNSES--LAPB--DTE---PSDN_Access_Class---X25 Access Filter--RELAY-{cotd}

{codt}--LLC2_Access_class--LLC2_DTE-A-LLC2...
                        \--LLC2_DTE-B-llc2...


Regards,
	Stephen Davies

T.RTitleUserPersonal
Name
DateLines
903.1LADDIE::MUGGERIDGEFri May 23 1997 09:4321
Hi,

Do you really need to filter on sub-addresses?  There are a number of other
fields which may better suit.... eg. X.25 Address, Call Data, etc.

I'm not entirely sure I know what your asking for, but if you just want an
overview of how to configure this, then here it is:

On the Relay Client, (ie the LAN based node)

If you do not have control over addressing, then you may need to setup a
template which sets Call Data to a specified value.

On the Relay Node:

Associate the filter with the X.25 Relay and filter on incoming address.  If
not address, then setup the filter with the Call Data as indicated in the
corresponding template.

Hope this helps,
Matt.
903.2Is this the correct ay to filter the call ?BROUGH::DAVIESHype is a 4 letter word !Tue May 27 1997 22:5313
Matt,
	It seems that the customer wants to use the sub address to determine 
the final destination node. So they call the using the PSDN address plus 
a sub address eg psdn address 2342734998877 sub address 04 gives a destination
address of 234273499887704. If I understand the filter params correctly, I 
would make this the matching address for the filter. Is this the correct way
to do it or is there are better way. He does not want to play around with
call user data. I have used this in POS applications successfully so I did
suggeat this to them but they refused to consider it.

Regards,
	Stephen Davies

903.3OZROCK::HARTWIGArthur Hartwig, TaN Engineering-AustraliaWed May 28 1997 03:243
    Yes, filter on incoming address 234273499887704 in the filter used by
    the relay client.