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378 CHAPTER 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
5 Configure 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
By default, touch-off is disabled on the interface.
6 Disable 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
By default, split-horizon is enabled on the interface.
7 Configure 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.
Operation Command
Configure length of service information reserving
queue
ipx sap max-reserve-server
length
Restore default value of length of service information
reserve queue
undo ipx sap
max-reserve-server
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
Operation Command
Disable split-horizon undo ipx split-horizon
Enable split-horizon ipx split-horizon