Multicast Addresses

Multicast addressing defines a specific range of address values set aside for them. Therefore all IPv4 multicast addresses should be between 224.0.0.0 and 239.255.255.255.

More information on the concepts behind Multicast addressing can be found in the Multicast Forwarding section.

 

Multicast IP Range

This type of address will allow multicast broadcasts to a specified range of addresses.

 

Creating a Multicast IP Range address

1. Go to Policy & Objects > Addresses.

2. Select Create New.

• If you use the down arrow next to Create New, select Address.

3. Choose the Category, “Address”.

4. Input a Name for the address object.

5. Select the Type,URL Pattern (Explicit Proxy) from the dropdown menu.

6. Enter the URL value.

7. Select the Interface from the dropdown menu.

8. Check the Visibility box.

9. Input any additional information in the Comments field.

10. Press OK.

 

Example

Example of a URL pattern address for a wiki on the example.com website.

Category                   Address

Name                         Example.com_wiki

Type                          URL Pattern (Explicit Proxy)

URL Pattern              example.com/wiki/*

Interface                   any

Visibility                   [checked]

Comments                <optional>

Broadcast Subnet

 

This type of address will allow multicast broadcast to every node on a subnet.

1. Go to Policy & Objects > Addresses.

2. Select Create New. A drop down menu is displayed. Select Address.

3. In theCategory field, choseMulticast Address.

4. Input a Name for the address object.

5. In the Type field, select Broadcast Subnetfrom the drop down menu.

6. In the Broadcast Subnet field enter the address and subnet mask according to the format x.x.x.x/x.x.x.x or the short hand format of x.x.x.x/x.(Remember, it needs to be within the appropriate IP range 224.0.0.0 to 239.255.255.255)

7. In the Interface field, leave as the default any or select a specific interface from the drop down menu.

8. Select the desired on/off toggle setting for Show in Address List. If the setting is enabled the address will appear in drop down menus where it is an option.

9. Input any additional information in the Comments field.

10. Press OK.

 

Example

Field                                Value

Category                         Broadcast Subnet

Name                              Corpnet-B

Type                                Broadcast Subnet

Broadcast Subnet          224.5.5.0/24

Field                                Value

Interface                          any

Show in Address List    [on]

Comments                      Corporate Network devices – Broadcast Group B