3Com 10014299 manual Configure Using touch-off for an interface, Disable split-horizon

378CHAPTER 24: CONFIGURING IPX

If the length of a service information reserve queue is 1, the system saves only one service information. If the server to which the only service information corresponds is faulty, system will delete this information, and you cannot find any server to provide such service while searching for the substitute service information. When the length of a service information reserve queue exceeds 1, if one service information is deleted, it will be replaced with the next service information as soon as possible, so that you will have no trouble finding server. However, increasing the length of the service information reserve queue means in turn increases the system memory that will be occupied by IPX module.

Table 420 Configure length of service information reserve queue

Operation	Command
Configure length of service information reserving	ipx sap max-reserve-server
queue	length
Restore default value of length of service information	undo ipx sap
reserve queue	max-reserve-server

5Configure Using Touch-Off for an Interface

RIP and SAP of IPX send updating broadcast packets periodically. If you do not want routers to send broadcast packets all the time, touch-off can be used on an interface, so that updating messages will be sent only when the route or the service information changes.

Perform the following task in interface view.

Table 421 Configure Using touch-off for an interface

Operation	Command
Configure Using touch-off for an interface	ipx update-change-only
Configure Disabling touch-off on an interface	undo ipx update-change-only

By default, touch-off is disabled on the interface.

6Disable Split-Horizon

Split-horizon algorithm can avoid generating route loop. Split-horizon means that routes received from a specific interface are not to be sent from this interface. In special circumstances, split-horizon shall be disabled, sacrificing efficiency to achieve correct transmission of routes. It is recommended not to disable the RIP split-horizon unless necessary. Disabling split-horizon has no effect on point-to-point links.

Perform the following task in interface view.

Table 422 Disable split-horizon

Operation	Command
Disable split-horizon	undo ipx split-horizon
Enable split-horizon	ipx split-horizon

By default, split-horizon is enabled on the interface.

7Configure the Delay of Interface Sending IPX Packets

The delay indicates the speed at which an interface forwards IPX messages: long delay means slow forwarding, and short delay means Fast forwarding. In this way, the delay is important for the system to decide the best routing. You can adjust the value of delay for the interface to send IPX messages.

Perform the following task in interface view.