IBM SC41-5420-04 manual Configuration Steps, Creating the Line Description, Line Description Name

You can describe the characteristics of the communications devices using the by Create Device Description (Network) (CRTDEVNET) command or by letting the system create the device automatically when you activate TCP/IP.

If you want to change controller or device descriptions, use the Change Controller Description (Network) (CHGCTLNET) and Change Device Description (Network) (CHGDEVNET) commands. For more information on changing controller or device descriptions, see Control Languages (http://publib.boulder.ibm.com/pubs/html/as400/v5r1/ic2924/info/rbam6/ rbam6clmain.htm) in the Information Center. If you are using the Supplemental Manuals CD, then switch to the iSeries Information Center CD to access this information.

Configuration Steps

To connect any of the communications adapters listed in Table 8 on page 75 to the network, perform the following steps:

1.Create a line description (see “Creating the Line Description”).

2.Set the line description maximum frame size or SSAP maximum frame size. You must consider this value when setting the maximum transmission unit (MTU) of the TCP/IP interface (see “Setting the Maximum Transmission Unit” on page 77). This is not a required step because there are default MTU values for all line types.

Creating the Line Description

If you have already configured a physical line, this existing line can be shared between TCP/IP data and data from other protocols like SNA or OSI at the same time. There is no need for a separate physical line to support TCP/IP. If a line description does not exist for a physical IOP, you must create a new one. Use one of the commands mentioned in Table 8 on page 75 to create a line description or network interface appropriate for your communications adapter. For more information on creating line descriptions, see LAN, Frame-Relay and ATM Support, X.25 Network Support, and Communications Configuration. Pay particular attention to the following items when creating or changing a line description for TCP/IP communications:

vLine description name.

vSource Service Access Point (SSAP).

Line Description Name

You need the name of the line description when you configure TCP/IP on your system (see “Step 1—Configuring a Line Description” on page 10). Remember the name you choose when you create the line description, or use the Work with Configuration Status (WRKCFGSTS) command to find the name of an existing line.

Source Service Access Point

If the line type supports source service access points (SSAP), you must specify X'AA' as entries in the SSAP list. SSAP examples include Token-ring, Ethernet IEEE802.3, DDI, and wireless. This occurs by default when you create a new line description and leave the SSAP parameter at its default value of *SYSGEN. If you have an existing line description, use the appropriate change line description command and add X'AA' to the SSAP list.

If the Ethernet standard prompt value is *ALL or IEEE8023, then you must specify X'AA' as entries in the SSAP list. This occurs by default when you create a new line description and leave the SSAP parameter at its default value of *SYSGEN.

76OS/400 TCP/IP Configuration and Reference V5R1