IBM SC41-5420-04 manual Preferred binding interface, Adding TCP/IP routes, Dftroute None

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 5, 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 server is directly attached to when you are using an iSeries adapter.

Manual configuration of the routes that tell TCP/IP how to reach the local networks is not required. iSeries 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 5) is shown.

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 5. Work with TCP/IP Routes Display

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 6 on page 15.

(To go directly to this display, type the ADDTCPRTE command on any command line and press F4.)

14OS/400 TCP/IP Configuration and Reference V5R1