Specifications

Configuring Routing Between VLANs
Configuration Examples for Configuring Routing Between VLANs
58
IPX Routing over ISL Configuration: Example
Figure 88 shows IPX interior encapsulations configured over ISL encapsulation in VLAN
configurations. Note that three different IPX encapsulation formats are used. VLAN 20 uses SAP
encapsulation, VLAN 30 uses ARPA, and VLAN 70 uses novell-ether encapsulation. Prior to the
introduction of this feature, only the default encapsulation format, “novell-ether,” was available for
routing IPX over ISL links in VLANs.
Figure 88 Configurable IPX Encapsulations Routed over ISL in VLAN Configurations
VLAN 20 Configuration
ipx routing
interface FastEthernet 2/0
no shutdown
interface FastEthernet 2/0.20
encapsulation isl 20
ipx network 20 encapsulation sap
VLAN 30 Configuration
ipx routing
interface FastEthernet 2/0
no shutdown
interface FastEthernet 2/0.30
encapsulation isl 30
ipx network 30 encapsulation arpa
Wide-area link
carrying VLAN traffic
Workstation C
on an IPX LAN
with novell-ether
encapsulation
VLAN 70
VLAN 20
VLAN 30
FE 2/0
Catalyst
5000 switch
Catalyst
2900 switch
FE 3/0
Fast Ethernet links
carrying ISL traffic
Workstation A
running NetWare 4.0
on an IPX LAN with
sap encapsulation
Workstation B
on an IPX LAN with
arpa encapsulation
S6240
Cisco 7200 router
running traffic
between VLANs
RSP