IP Addresses Window

This window appears when you choose Administration > IP Addresses on the menu bar. You can also click here to launch it. Use it to assign network addresses to VLANs and, for Catalyst 3550 switches, to create SVIs (switched virtual interfaces) and routed ports.

Begin by selecting the device from the Host Name list. Then use these tabs:

When you are done, click OK.

Interface Configuration

In the Interface Name column, you see the names of the VLANs and, for Catalyst 3550 switches, the names of ports. To assign an IP address and subnet mask to a VLAN or to a port or to modify an address and mask:

  1. Click the row of a VLAN or port.
  2. Enter an IP address in the IP Address cell.
  3. Expand the list of subnet masks in the Subnet Mask cell.
  4. Select a subnet mask from the list.

If a non-3550 switch has more than one VLAN with an IP address, only one at a time can be active. Use the Management VLAN window to specify the active VLAN.

To create an SVI on a Catalyst 3550 switch:

  1. Click in the row of a VLAN that has an IP address and subnet mask.
  2. Check the box in the Routed cell.

To create a routed port on a Catalyst 3550 switch:

  1. Click in the row of a port that has an IP address and subnet mask.
  2. Check the box in the Routed cell.

Creating an SVI or a routed port does not enable routing on the device. To do that you must choose Device > IP Routing > Protocols and use the IP Routing Protocols window. This window is available only if you have a Catalyst 3550 switch in the cluster.

Device Configuration

  1. In the Default Gateway field, enter the IP address to which the device will send traffic that contains an unknown address.
  2. In the Domain Name field, enter a name that identifies an administrative region in the IP network. (You might need to ask your network administrator for this information.) When network traffic contains no domain name, the name you enter is appended to the name of the device, and the fully qualified name is added to the device's host name table.