Communicator 3000 MPE/iX Release 6.0 (Platform Software Release C.60.00) (30216-90269)

Chapter 3 53

System Management

Increase in Number of TCP Connections

by Ganesh HS and Chandrashekar MN

Commercial Systems Division

Introduction

Prior to the MPE/iX 6.0 release, TCP on MPE/iX allowed a maximum of

4096 connections. An enhancement to the TCP module allows up to

5600 connections. The version ID of TCP (NET_TCP_VERS in

nmmaint,3) which supports this feature will start with B060.

Conﬁguration through NMMGR

You need to conﬁgure the machine to allow it to go up to 5600

connections. The NMMGR screen for conﬁguring the maximum

connections looks like the following:

NMMGR/3000 (B.06.00) Transmission Control Protocol (TCP) Config Data:

When Data Flag is "N", press "Save Data" to create the data record.

Command:

Path: NETXPORT.GPROT.TCP

[N] Checksum Enabled (Y For Yes, N For No)

[256 ] Maximum Number of Connections

[2 ] Retransmission Interval Lower Bound (Secs)

[180 ] Maximum Time to Wait For Remote Response (Sec)

[10 ] Initial Retransmission Interval (Secs)

[4 ] Maximum Retransmissions per Packet

[600 ] Connection Assurance Interval (Secs)

[3 ] Maximum Connection Assurance Retransmissions

File: NMCONFIG.PUB.SYS

Save Help Prior

Data Screen

The ﬁeld, "Maximum number of connections" can now handle up to

5600 connections. Before this enhancement the range was 0 to 4096. To

reach this screen, "Transmission Control Protocol (TCP) Conﬁg" in

NMMGR, do the following:

1. Go to [ Open Conﬁg ]

2. Go to [ NS ]

3. Go to [ Unguided ]

4. Go to [ Netxport ]

5. Go to [ Gprot ]

6. Go to [ Tcp ]