3Com 7757 Configuration Manual page 144

144 C 17: IPX C
HAPTER ONFIGURATION
Configuring IPX
forwarding
Table 91 Configure IPX service information
Operation
Configure a static IPX service
entry
Configure the maximum
length of the service
information reserve queue
for one service type
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.
Table 92 Configure IPX forwarding
Operation
Enter system view
Enable IPX
Enter VLAN interface view
Configure an IPX network
number for the VLAN
interface
Enable triggered update of
IPX
Enable split horizon of IPX
Configure the
encapsulation format of
the IPX frame
Command
ipx service service-type name
network.node socket hop hops
[ preference preference ]
ipx sap max-reserve-servers
length
Command
system-view
ipx enable
interface Vlan-interface vlan-id -
ipx network network
ipx update-change-only
ipx split-horizon
ipx encapsulation [ dot2 | dot3
| ethernet-2 | snap ]
Description
Optional
By default, no static service
entry is found in the service
information table
Optional
By default, the maximum
length of the service
information reserve queue
for one service type is 2,048
Description
-
Required
IPX is disabled by default
Required
By default, the system does
not assign network numbers
to VLAN interface. That is, IPX
is disabled on all the VLAN
interfaces
Optional
By default, triggered update
of IPX is disabled
Optional
By default, split horizon is
enabled
Optional
By default, the encapsulation
format of the IPX frame is
802.3 (dot3)