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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:
v Line description name.
v Source 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.Ifyou
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.
76 OS/400 TCP/IP Configuration and Reference V5R1