FortiGate Administration Guide - FirewallShop.com

Multicast
Router Dynamic
Overriding the multicast settings on an interface
Multicast (PIM) interface options enable you to set operating parameters for
FortiGate interfaces connected to PIM domains. For example, you can enable
dense mode on an interface that is connected to a PIM-enabled network segment.
When sparse mode is enabled, you can adjust the priority number that is used to
advertise Rendezvous Point (RP) and/or Designated Router (DR) candidacy on
the interface.
Figure 162:Multicast interface settings
Multicast destination NAT
Interface
Select the name of the root VDOM FortiGate interface to which
these settings apply. The interface must be connected to a PIM
version 2 enabled network segment.
PIM Mode
Select the mode of operation: Sparse Mode or Dense Mode. All
PIM routers connected to the same network segment must be
running the same mode of operation. If you select Sparse Mode,
adjust the remaining options as described below.
DR Priority
Enter the priority number for advertising DR candidacy on the
FortiGate interface. The range is from 1 to 4 294 967 295.
This value is compared to the DR interfaces of all other PIM
routers on the same network segment, and the router having the
highest DR priority is selected to be the DR.
RP Candidate Select to enable or disable RP candidacy on the interface.
RP Candidate Priority Enter the priority number for advertising RP candidacy on the
FortiGate interface. The range is from 1 to 255.
Multicast destination NAT (DNAT) allows you translate externally received
multicast destination addresses to addresses that conform to an organization's
internal addressing policy.
Using this feature, users do not need to redistribute routes at the translation
boundary into their network infrastructure for Reverse Path Forwarding (RPF) to
work properly, and users can receive identical feeds from two ingress points in the
network and route them independently.
Multicast DNAT is configured in the CLI using the following command:
config firewall multicast-policy
edit p1
set dnat
set ...
next
end
For more information, see the “firewall” chapter of the FortiGate CLI Reference.
FortiGate Version 3.0 MR5 Administration Guide
260 01-30005-0203-20070830