Allied Telesis AT-8550 - Manual (Page 194)

Overview of IPX
11-2
Figure 11-1 shows the same switch discussed earlier in Figure9-1 . In
Figure 11-1, IPX routing has been added to the switch, and two
additional VLANs have been defined; Exec, and Support. Both VLANs
have been configured as protocol-specific VLANs, using IPX.
Figure 11-1 IPX VLAN Configuration
Note
For more information on protocol-specific VLANs, refer to Chapter 4 .
Exec has been assigned the IPX NetID 2516. Support has been
assigned the IPX NetID A2B5. Port 5 is assigned to Exec; port 7 is
assigned to Support. In addition, port 4 has been assigned to Exec.
Thus, the port 4 belong to both the Personnel VLAN (running IP) and
the Exec VLAN (running IPX).
Traffic within each VLAN is switched using the Ethernet MAC address.
Traffic between Exec and Support is routed using the IPX NetID.
Traffic cannot be sent between the IP VLANs (Finance and Personnel)
and the IPX VLANs (Exec and Support).
IPX Routing
Performance
The forwarding rates for IPX routing of switches occurs through the
CPU of the switch. Therefore, IPX routing does not perform at the
same line-rate speeds as TCP/IP routing. Layer 2 switching within a
VLAN occurs at line-rate for all protocols.