Version 3 adds the concept of filtering, based on the IP source address, to cut down on the reception of unwanted multicast traffic. A number of IGMP groups are randomly shared across a group of hosts. The simulation calls for groups of simulated hosts to respond to IGMP router-generated queries and to automatically generate reports at regular intervals. The Ixia hardware simulates one or more hosts, while the DUTs are assumed to be IGMP routers. The routers forward membership information and packets to other IGMP routers and receive group membership information and packets from other IGMP routers. IGMP normally works in an environment in which there are a number of IGMP-capable hosts connected to one or more IGMP routers. Version 1 of the protocol is specified in RFC 1112, and Version 2 is specified in RFC 2236. Version 3, specified in RFC 3376, is supported and is interoperable with Versions 1 and 2. The Internet Group Management Protocol (IGMP) is used with IPv4 to control the handling of group membership in the Internet. When a gateway separates the Ixia port from the DUT, use the IP address of that gateway as the Default. In most cases, the Default Gateway Address is the address of the DUT. IP addresses may be expressed as individual addresses or as a range of addresses.Īll ARP requests (for Ethernet) are sent to the Default Gateway address. The IP table within the ARP window specifies a per-port correspondence between IP addresses, MAC addresses (for Ethernet ports only), and the Default Gateway. ARP'ing the Device Under Test (DUT) allows tests and generated frames to be configured with a specific IP address, which at run time is associated with the MAC address of that particular DUT. The resulting responses from ARP requests are held in the ARP Table, which is used to set MAC addresses for transmitted data. This option is only available on Ethernet load modules.
The Address Resolution Protocol (ARP) facility controls the manner in which ARP requests are sent.
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