Help! - DDF & TCP/IP (DB2 V6 on OS390) overview

Dale E. Miller

Help! - DDF & TCP/IP (DB2 V6 on OS390) overview
I am working on an install of a new V6 subsystem. We want to make use of DDF
for the first time and connect to DB2 on OS390(V2.8). The install manual
makes the TCP/IP setup look fairly simple. What is confusing is the section on
"Defining DB2 to VTAM". Our network guy wants to know "why we are doing this?"
and "Is each DB2 subsystem going to be a VTAM node?" and "Where does LU6.2 come
into play?". I'm stumped. My knowledge of VTAM ends after I spell it.
Can someone explain, in simple terms, what VTAM has to do in the "big picture"
of setting up DDF and TCP/IP connections? Or at least point me in the
direction of more documentation. I have already read the DB2 V6 Installation
Guide and Administration Guides on DDF and setting it up. I have searched the
ListServ archives for threads on this topic and read through them. All seem to
be on very specific issues/problems. None seems to answer the "hi-level"
questions I am being asked. I have shown this documentation to our network
guru and he does not think it is clear enough. Can somebody help me out? TIA

P.S. I have also read the "WOW! DRDA Supports TCP/IP:" redbook as well. But it
does not really address the VTAM questions I am getting.

--------
//-- Dale Miller
//-- Database Administrator
//-- [login to unmask email]



Piontkowski Michael ML

Re: Help! - DDF & TCP/IP (DB2 V6 on OS390) overview
(in response to Dale E. Miller)
Dale -

Yes, The VTAM requirements must be satisfied to use DDF & TCP/IP.
DDF "base" code (i.e. before TCP/IP) requires VTAM resources.
I was told that the DDF code that supplies the TCP/IP support
uses DDF "base" code. TCP/IP support needs the same functions
(e.g. reading the SYSDDF database) supplied by the DDF "base"
code. Sharing code makes sense from a development and support
point of view.



Mike Piontkowski
TP&S Technical Maintenance
Voice: +1 302.886.4612
Fax: +1 302.886.4749


-----Original Message-----
From: Dale E. Miller [mailto:[login to unmask email]
Sent: Thursday, December 14, 2000 11:46
To: [login to unmask email]
Subject: [DB2-L] Help! - DDF & TCP/IP (DB2 V6 on OS390) overview


I am working on an install of a new V6 subsystem. We want to make
use of DDF
for the first time and connect to DB2 on OS390(V2.8). The install manual
makes the TCP/IP setup look fairly simple. What is confusing is the section
on
"Defining DB2 to VTAM". Our network guy wants to know "why we are doing
this?"
and "Is each DB2 subsystem going to be a VTAM node?" and "Where does LU6.2
come
into play?". I'm stumped. My knowledge of VTAM ends after I spell it.
Can someone explain, in simple terms, what VTAM has to do in the
"big picture"
of setting up DDF and TCP/IP connections? Or at least point me in the
direction of more documentation. I have already read the DB2 V6
Installation
Guide and Administration Guides on DDF and setting it up. I have searched
the
ListServ archives for threads on this topic and read through them. All seem
to
be on very specific issues/problems. None seems to answer the "hi-level"
questions I am being asked. I have shown this documentation to our network
guru and he does not think it is clear enough. Can somebody help me out?
TIA

P.S. I have also read the "WOW! DRDA Supports TCP/IP:" redbook as well. But
it
does not really address the VTAM questions I am getting.

--------
//-- Dale Miller
//-- Database Administrator
//-- [login to unmask email]








Piontkowski Michael ML

Re: Help! - DDF & TCP/IP (DB2 V6 on OS390) overview
(in response to Piontkowski Michael ML)
Hit the send button too soon.

Yes, each non-data sharing subsystem needs its own unique LU.
Similar to each non-data sharing DB2 subsystem needing its own
primary and recovery TCP/IP port numbers.

Before TCP/IP, DDF needed to support multiple concurrent
connections to DB2 through one DDF address space.
DDF wouldn't be very useful if it was one connection per
DDF address space. Hence, DB2's need for a multi-session
LU6.2 LU, not a single session LU6.2 LU.




Mike Piontkowski
TP&S Technical Maintenance
Voice: +1 302.886.4612
Fax: +1 302.886.4749


-----Original Message-----
From: Piontkowski, Michael L
Sent: Thursday, December 14, 2000 12:50
To: [login to unmask email]
Cc: '[login to unmask email]'
Subject: RE: [DB2-L] Help! - DDF & TCP/IP (DB2 V6 on OS390) overview


Dale -

Yes, The VTAM requirements must be satisfied to use DDF & TCP/IP.
DDF "base" code (i.e. before TCP/IP) requires VTAM resources.
I was told that the DDF code that supplies the TCP/IP support
uses DDF "base" code. TCP/IP support needs the same functions
(e.g. reading the SYSDDF database) supplied by the DDF "base"
code. Sharing code makes sense from a development and support
point of view.



Mike Piontkowski
TP&S Technical Maintenance
Voice: +1 302.886.4612
Fax: +1 302.886.4749


-----Original Message-----
From: Dale E. Miller [mailto:[login to unmask email]
Sent: Thursday, December 14, 2000 11:46
To: [login to unmask email]
Subject: [DB2-L] Help! - DDF & TCP/IP (DB2 V6 on OS390) overview


I am working on an install of a new V6 subsystem. We want to make
use of DDF
for the first time and connect to DB2 on OS390(V2.8). The install manual
makes the TCP/IP setup look fairly simple. What is confusing is the section
on
"Defining DB2 to VTAM". Our network guy wants to know "why we are doing
this?"
and "Is each DB2 subsystem going to be a VTAM node?" and "Where does LU6.2
come
into play?". I'm stumped. My knowledge of VTAM ends after I spell it.
Can someone explain, in simple terms, what VTAM has to do in the
"big picture"
of setting up DDF and TCP/IP connections? Or at least point me in the
direction of more documentation. I have already read the DB2 V6
Installation
Guide and Administration Guides on DDF and setting it up. I have searched
the
ListServ archives for threads on this topic and read through them. All seem
to
be on very specific issues/problems. None seems to answer the "hi-level"
questions I am being asked. I have shown this documentation to our network
guru and he does not think it is clear enough. Can somebody help me out?
TIA

P.S. I have also read the "WOW! DRDA Supports TCP/IP:" redbook as well. But
it
does not really address the VTAM questions I am getting.

--------
//-- Dale Miller
//-- Database Administrator
//-- [login to unmask email]