Lan Port Configuration; Vlans - AT&T U115 Install Manual

LAN Port Configuration

VLANS

VLAN support allows segmentation of the 8 Local LAN ports into different logical LANs, each with its own address range,
and addressing method (DHCP, DHCP Relay, or static). If your U115 has been configured for VLANs, as part of
installation you will need to know which of the 8 Local LAN Ports attach to each network.
You can view the VLAN configuration through the U115 web interface as described below.
After initial power on, and once the Internet Connection has been correctly configured, the U115 will retrieve its
configuration from the network and will likely perform an automatic reboot to pick up the new configuration. This should
occur within the first 2-3 minutes after initial power on. You will not be able to view the VLAN configuration until the
U115 has successfully retrieved its configuration.
1. Following the automatic reboot open your web browser as described in "Access the U115 Web Interface" on
page 8. It may be necessary to reboot or reconfigure your devices attached to the U115 in order to obtain/assign
a valid IP address if the IP addressing was changed when the U115 retrieved its VLAN configuration.
2. Click on the Control Panel navigation icon.
3.
Click the entry for Network Settings to display the Network Settings sub-menu and click the entry for Local LAN
Settings as shown in
4. The next window will display the Local LAN Settings. If VLANs have been configured, the display will appear as
Figure 17
in . If VLANs have not been configured, the display will appear as in
been configured, skip to the description for "Hub Mode" on page 25.
5. The display shows several rows, sorted by VLAN ID that describes which back-panel Ethernet ports are assigned
to each VLAN. The numbers in the Port column correspond to the numbers printed on the back of the U115.
6. Attach your Local LAN cables to an appropriate port based on designated VLAN. If more than one port has been
allocated to a VLAN, any of those ports can be used.
7. If you are not sure of the Network-to-VLAN number mapping, click on any of the VLAN ID hyperlinks to view
detailed information on the VLAN.
8. The next window will display the details for the VLAN. The format and content depend on factors such as
whether DHCP or DHCP relay are being used, or whether static IP addresses have been configured. In the
example for Figure 18, DHCP is configured and so the range of IP addresses and subnet mask is displayed.
Information on any addresses already given out using DHCP will also appear on this window.
9. If you are still unsure what VLAN IDs and ports apply to your local networks, contact your IS Department.
10. When complete, return to "Establishing VPN Connectivity" on page 20.
Figure 16
.
22
Figure 19
. If no VLANs have