Changing the System Configuration

If you are changing the number of boards that are installed on your system, or if you are changing the type of board to boards with more links, then we recommend that you re-install the product with the information that you need to change. Refer to your installation manual for instructions on how to do this.

If all that you need to do is change the number of Virtual Circuits that you have on each link, then you should not reinstall. Instead follow the instructions in the next section.

Adding Virtual Circuits

By default, Netcom II is installed with 64 virtual circuits per link. This value should be satisfactory for the majority of installations.

In order to change the number of Virtual Circuits, you will need to edit the file /kernel/drv/pkt.conf. There are a number of parameters affecting the driver including the parameter "tsg_numvcns". This is the parameter that you must change.

You should change the value of "tsg_numvcns" to one of the following:

64
128
256
512
768
1024

After modifying pkt.conf, you will need to reboot your machine so that the driver sees the new value.

Changing /etc/packetnets

The association of a particular network identifier (netid) to a board and link number is found in the file /etc/packetnets. For example, programs written to make calls on the X.25 lines may refer to either a netid or a network name when placing the call.

This file will typically have entries such as:

NETID   0
	NAME    link0
	TYPE    X25
	CONFIG  link0
	BRDTYPE SGP
	NETWORK /dev/x25pkt
	PPA     0
	MODULE  NONE
# Stack Building Actions:
        OPEN    /dev/sgp
        ATTACH  0
# comment out the following two lines to disable tracing
        PUSH    x25trc
        SETNID
#
        ILINK   /dev/x25frm
        ILINK   /dev/x25pkt
        SETNID
        SETCONF
END

This indicates that the netid numbered 0 and called link0 is associated with PPA 0. You may wish to change the network name to Datapac or Sprintnet if that is the name of the network the link is connected with. This may make for an easier to remember the association in your programs.

Revision 1.1 (January 2002)