3Com Switch 7750 Configuration Guide Guide

136 CHAPTER 16: IPX CONFIGURATION
Configuring IPX
forwarding
IPX RIP and SAP periodically broadcast update packets. If the periodical broadcast
is not desired, you can enable triggered update on the VLAN interfaces of the
switch. This allows the switch to broadcast update packets only when route or
service information changes, thus avoiding broadcast flooding.
In some cases, split horizon must be disabled to ensure the correct transmission of
routing information. Split horizon eliminates routing loops by forbidding the
switch to send the routing information out of the interface where it is received.
Disable split horizon only when necessary and with cautions, because it can result
in routing loops.
Novell NetWare defines the type 20 IPX broadcast packet for the network basic
input/output system (NetBIOS). You can enable/disable the forwarding of type 20
broadcast packets to other segments as required.
Tabl e 82 Configure IPX service information
Operation Command Description
Enter system view system-view -
Enable IPX ipx enable
Required
IPX is disabled by default
Configure a static IPX service
entry
ipx service service-type name
network.node socket hop
hops [ preference preference
]
Optional
By default, no static service
entry is found in the service
information table
Configure the maximum
length of the service
information reserve queue for
one service type
ipx sap
max-reserve-servers length
Optional
By default, the maximum
length of the service
information reserve queue for
one service type is 2,048
Tabl e 83 Configure IPX forwarding
Operation Command Description
Enter system view system-view -
Enable IPX ipx enable
Required
IPX is disabled by default
Enter VLAN interface view
interface Vlan-interface
vlan-id
-
Configure an IPX network
number for the VLAN
interface
ipx network network
Required
By default, the system does
not assign network numbers
to VLAN interface. That is, IPX
is disabled on all the VLAN
interfaces
Enable triggered update of
IPX
ipx update-change-only
Optional
By default, triggered update
of IPX is disabled
Enable split horizon of IPX ipx split-horizon
Optional
By default, split horizon is
enabled