Creating a prefix list

You can create a prefix list in the CPE template or on a CPE device. A prefix list created in the CPE template is automatically created on all CPE devices that use this CPE template.

To create a prefix list:

  1. Create a prefix list in one of the following ways:
    • If you want to create a prefix list in a CPE template, go to the SD-WAN → CPE templates menu section, click the CPE template, and select the Routing filters → Prefix lists tab.
    • If you want to create a prefix list on a CPE device, go to the SD-WAN menu section, click the CPE device, select the Routing filters → Prefix lists tab, and select the Override check box.

    A table of prefix lists is displayed.

  2. Click + Prefix list.
  3. This opens a window; in that window, in the Name field, enter the name of the prefix list. Maximum length: 50 characters. Do not use spaces in this field.
  4. Create a rule in the prefix list:
    1. Click + Rule.
    2. In the Sequence field, enter the sequential number of the rule. The rule with the lowest sequence number is the first to be applied to the IPv4 prefix by the prefix list. Range of values: 1 to 4,294,967,295.
    3. In the Network drop-down list, select the type of the rule:
      • Any network for a rule that allows or denies all IPv4 prefixes.
      • IP/mask for a rule that allows or denies the specified IPv4 prefix. Default value. If you select this value, enter the IPv4 prefix in the field that is displayed.
    4. In the Action drop-down list, select the action that the rule performs with the IPv4 prefix:
      • Permit allows the IPv4 prefix. Default value.
      • Deny blocks the IPv4 prefix.
    5. In the Greater or equal field, enter the starting value of the prefix length range to which the prefix list applies the rule. Range of values: 0 to 32.
    6. In the Less or equal field, enter the ending value of the prefix length range to which the prefix list applies the rule. Range of values: 0 to 32.

    The rule is created. You can create multiple rules or delete a rule. To delete a rule, click the delete icon next to it.

  5. Click Create.

    The prefix list is created and displayed in the table.

  6. In the upper part of the settings area, click Save to save the settings of the CPE template or CPE device.
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