Ip Forwarding - Alcatel OmniSwitch 6800 Series Network Configuration Manual

Configuring IP

IP Forwarding

IP is enabled by default. Using IP, devices connected to ports on the same VLAN are able to communi-
cate. However, to forward packets to a different VLAN, you must create a router port on each VLAN.
In the illustration below, a router port has been configured on each VLAN. Therefore, workstations
connected to ports on VLAN 1 on Switch 1 can communicate with VLAN 2; and workstations connected
to ports on VLAN 3 on Switch 2 can communicate with VLAN 2. Also, ports from both switches have
been assigned to VLAN 2, and a physical connection has been made between the switches. Therefore,
workstations connected to VLAN 1 on Switch 1 can communicate with workstations connected to VLAN
3 on Switch 2.
Switch 1
VLAN 1
110.0.0.0
110.0.0.1 110.0.0.2
Creating an IP Router Port
You must configure an IP router port on a VLAN for devices on that VLAN to communicate with devices
on other VLANs. You can only create one IP router port per VLAN. VLAN router ports are not active
until at least one active port is assigned to the VLAN. Up to 4094 router ports per stack are supported.
Use the vlan router ip
IP address of the router port. For example, to create a router port on VLAN 1 with an IP address of
171.10.11.1, you would enter:
-> vlan 1 router ip 171.10.11.1
Use the show ip interface
Note. Router port IP addresses must be unique. You cannot have two router ports with the same IP
address. For more information on VLANs and router ports, see
OmniSwitch 6800 Series Network Configuration Guide
IP Router Port
=
Physical
Connection
VLAN 2
120.0.0.0
IP Forwarding
command to configure an IP router port on a VLAN. Include the VLAN ID and the
command to display all IP VLAN interfaces.
VLAN 2
120.0.0.0
130.0.0.1
Chapter 4, "Configuring VLANs."
November 2004
IP Forwarding
Switch 2
VLAN 3
130.0.0.0
130.0.0.2
page 12-5