VLAN
Virtual LANs (VLANs) allow you to configure groups of users independent of
their physical location. This arrangement of users or ports is called a logical
grouping. The logical group of ports is called a VLAN. Ports or groups of ports
in a VLAN are called members. VLANs isolate all traffic, including broadcasts
and multicasts from being propagated to members of other VLANs.
CiscoView provides device-level VLAN configuration for the Catalyst 1600. To
see VLAN information and configure VLANs, select Device>Configure. The CiscoView Configure Device window appears. Select VLAN from the CATEGORY popup menu. The Configure VLAN window appears. The Configure VLAN window can
also be accessed from the VLAN icon in the toolbar.
On a Catalyst 1600, the buttons at the bottom of the Configure VLAN window
allow you to perform the following tasks with VLANs:
Create
Delete
Modify
Show Members
Ports
The Configure VLAN window shows two tables:
VLAN Table
VLAN Member Table
Create
Allows you to create a VLAN. To create a VLAN, do the following:
- Type the VLAN name into an empty cell.
The VLAN name can be up to 16 characters long.
- Click Create.
The VLAN is created and given the default broadcast value of impermeable. All
newly created VLANs have a broadcast value of impermeable.
Modify
Allows you to modify all changed cells in the VLAN table. You can change a
VLAN name or change its broadcast value (for example, from impermeable to
permeable).
To modify a VLAN, do the following:
- Make the change you want.
- Click Modify.
Show Members
Allows you to see all members of the current VLAN in the VLAN membership table.
To see members of the currently selected VLAN, click on the Show Members
button. You can also see the VLAN members by double-clicking in the VLAN table.
Ports
To see the VLAN membership of all ports on a device, click Port.
This brings up a window that allows you to see the VLAN membership of all
ports on the device.
VLAN Table
The VLAN table can show up to 16 VLANs and contains the following information:
VLAN ID (RingswitchLanNum)
VLAN number for which this entry contains virtual LAN details.
VLAN Name (RingswitchLanName)
Name that the administrator has given this VLAN.
VLAN Broadcasts (RingswitchLanPermeable)
Whether the VLAN is permeable or impermeable. In an impermeable group,
broadcast frames that were received on a port in the group but were not originated in
the group are discarded. In a permeable group, broadcast frames are transmitted
on the other ports in the group.
VLAN Member Table
The VLAN membership table shows the members of the current VLAN and can record
up to 64 VLAN members. Below this table are the following buttons for adding
and removing cells:
Add
Allows you to add the current cell to this VLAN.
Remove
Allows you to remove the current cell from this VLAN.