Creating Prefix Lists

To create a prefix list, complete the following:

1. Log in to the Cloud Services Portal.
2. Click Manage > Routing > Prefix List.
3. On the Prefix Lists page, click Create.
4. In the Create Prefix List dialog, complete the following:
   • State: Use the toggle switch to enable or disable the prefix list.
     
   • Name: Enter the name of the prefix list. Create a name that does not exceed 64 characters in length. Use numbers, any special characters, uppercase and lowercase letters, and even spaces. Start and end a name with any character but not a space. Leading and trailing spaces will be trimmed off automatically.
   • Description: Enter the description for the IPv4 prefix list.
   • Click Add in the RULES section and complete the following:
     • ACTION: Choose the action you want to apply to this IPv4 prefix list. You can either allow or deny traffic to the route that matches the prefix list.
     • PREFIX: Enter the IPv4 prefix. For example, if you want to permit or deny traffic to 10.0.0.0/8, enter 10.0.0.0/8 here.
     • PREFIX LENGTH GE: Specifies the prefix length that is greater than or equal to the subnet value. This is the lowest value of the range of the prefix length.
     • IPV4 PREFIX LENGTH LE: Specifies the prefix length that is less than or equal to the subnet value. This is the highest value of the range of the prefix length.
   • You can also delete a prefix list by selecting the check box of the prefix list and clicking Remove.
5. Click Save &Close to save the configuration.