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For additional information about setting the MTU, see Appendix A.
Configuring a Physical Line for TCP/IP Communication.
Preferred binding interface
The preferred binding interface allows administrators to choose which of the
TCP/IP interfaces that they prefer the route to be bound to or on. This
provides the administrator with more flexibility to route traffic over a specific
interface. The interface is preferred because the route is bound to the
indicated interface if the interface is active. If the indicated interface is not
active, then a best-match-first algorithm is used in determining which
interface the route is bound.
In Figure 13, a preferred binding interface of *NONE has been defined. By
using this definition, the user allows the TCP/IP protocol stack to choose an
interface to bind this route to, using a best-match-first algorithm.
Adding TCP/IP routes
You must define routes for any TCP/IP network, including subnetworks, with
which you want to communicate. You do not need to define routes for the
TCP/IP network that your AS/400 system is directly attached to when you
are using an AS/400 adapter.
Manual configuration of the routes that tell TCP/IP how to reach the local
networks is not required. AS/400 TCP/IP generates these routes
automatically from the configuration information for the interfaces every time
TCP/IP is started. In other words, the direct route to the network, which has
an interface attached, is automatically created when you add the interface.
To display all routing entries, including direct routes, use the Network Status
(NETSTAT) command after starting TCP/IP.
To add a route, type option 2 on the Configure TCP/IP menu. The Work
with TCP/IP Routes display (Figure 13) is shown.
Type option 1 (Add) at the input-capable top list entry on that display to go
to the Add TCP/IP Route (ADDTCPRTE) display, as shown in Figure 14 on
page 35.
(To go directly to this display, type the ADDTCPRTE command on any
command line and press F4.)
Work with TCP/IP Routes
System: SYSNAM890
Type options, press Enter.
1=Add 2=Change 4=Remove 5=Display
Route Subnet Next Preferred
Opt Destination Mask Hop Interface
_ ________________ _______________ _______________
_ *DFTROUTE *NONE 9.4.73.193 *NONE
Figure 13. Work with TCP/IP Routes Display
34 OS/400 TCP/IP Configuration and Reference V4R4