Configuring a VLAN in the topology

To configure a VLAN in the topology:

1. Navigate to the topology in one of the following ways:
   • Start creating or editing a network service template.
   • Start creating or editing a network service.
2. In the topology, click the VLAN that you want to configure.

   The settings area is displayed in the lower part of the page. You can expand the settings area to fill the entire page by clicking the expand icon .

3. In the Name field, enter the name of the VLAN.
4. If necessary, in the Description field, enter a brief description of the VLAN.
5. If you want to configure the assignment of IP address to virtual network functions using DHCP:
   1. In the OpenStack DHCP drop-down list, select Enabled. The default setting is Disable.
   2. In the CIDR field, enter the IPv4 prefix of the OpenStack subnet that you want to assign IP addresses to virtual network functions.
   3. If you want the OpenStack subnet to assign a particular gateway to virtual network functions, enter the IPv4 address of the gateway in the Gateway field.
   4. Specify the range from which the OpenStack subnet must assign IP addresses to virtual network functions:
      1. Under Pools, click + Pool.
      2. In the fields that are displayed, enter the start and end values for the IP address range.

      The range of IP addresses is specified and displayed in the Pools section. You can specify multiple ranges of IP addresses; to delete a range, click Delete next to it.

   5. Specify the DNS server that the OpenStack subnet must assign to virtual network functions:
      1. Under DNS, click + DNS.
      2. In the field that is displayed, enter the IPv4 address of the DNS server.

      The DNS server is specified and displayed in the DNS section. You can specify multiple DNS servers; to delete a server, click Delete next to it.

6. If you want to use the network to create a shared network service, select the Share network check box. This check box is cleared by default.
7. If you want to assign a VLAN tag to virtual network functions, in the Segmentation ID field, enter the VLAN tag.
8. In the upper part of the settings area, click Save to save VLAN settings.