topic Re: DECNET Phase V in Operating System - OpenVMS

DECNET Phase V

VMS Support — Wed, 01 Mar 2006 09:22:57 GMT

We currently run DECNET Phase V.

I would like to increase NSP connections from 200 to 600.
We have 2GB of memory on the server.

For our information how much memory does each extra NSP allowed NSP connection require.

Of course each extra connection will allow extra process to be created that will require some type of resource.

The question is based on having the extra allowed connections but not using them.

Regards
Kevin Raven

mc ncl show imp

Node 0
at 2006-03-01-13:19:15.863+00:00Iinf

Characteristics

Implementation =
{
[
Name = OpenVMS AXP ,
Version = "V7.2-1H1"
] ,
[
Name = Compaq DECnet-Plus for OpenVMS ,
Version = "V7.2-1 ECO06 16-SEP-2002 10:40:46.89"
]
}

Re: DECNET Phase V

Ian Miller. — Wed, 01 Mar 2006 10:43:03 GMT

NCL SET NSP MAXIMUM TRANSPORT CONNECTIONS 600

To make this permenant then edit
SYS$MANAGER:NET$NSP_TRANSPORT_STARTUP.NCL

You are correct that using 600 connections will need more resources.

Re: DECNET Phase V

Michael Yu_3 — Wed, 01 Mar 2006 17:56:58 GMT

Hi Kevin,

When you increase NSP maximum connections from default of 200 to 600, you have to check the following as well.

1. Make sure "maximum receive buffers" = "maximum transport connections" X "maximum window"

2. Make sure "maximum remote nsaps" = "maximum transport connections" + 1

3. Memory required will be "maximum receive buffers" X "manual data link SDU size" of the routing circuit.

Hope it helps.

Thanks and regards.

Michael

Re: DECNET Phase V

Arch_Muthiah — Wed, 01 Mar 2006 18:45:08 GMT

Kevin,

adding to the above posting, when you edit SYS$STARTUP:NET$NSP_TRANSPORT_STARTUP.NCL file, make sure...
1. Maximum receive buffers value must be 8 times the value of the maximum transport connections

2. max window value must be greater than or equal to the number of maximum receive buffers divided by maximum transport connections.

Archunan

Re: DECNET Phase V

John Abbott_2 — Fri, 03 Mar 2006 05:00:16 GMT

Do you manually edit .NCL scripts ?

You should/can use NET$CONFIGURE to change these values.

$@NET$CONFIGURE ADVANCED
Select option- [4] Configure Transports

It will display the current values and allow you to change them. Not checked, but I would expect it to perform some form of sanity checks on your values. Entering a ? at the prompt will give additional help, it sometimes gives useful detailed info.

Also, the .NCL scripts are checksum'd, net$configure will report warnings if they've been altered outside of net$configure.

It's up to you, but net$configure is there to guide you

Kind Regards
John.

Re: DECNET Phase V

John Abbott_2 — Fri, 03 Mar 2006 05:06:16 GMT

PS...
1. you can ctrl_y out (no changes will be made) if you need to.
2. The current values for each question asked (on an already configured system) are presented in []
3. Once all questions are asked, it lists the new settings and gives you a final chance to accept or reject the changes made

Hope this helps
John.