Operation Manual

SFX SERIES USER’S GUIDE
Rev 2.2 46
Edit Field Description
Last Member Query
Count
This field sets the number of Group-Specific Queries that are sent out in response to a Leave
Group Message. The default value is equal to the Robustness Variable value, 2.
Starting Query
Interval
This field sets the frequency at which queries are sent out on startup of a multicast
transmission. The default value is ¼ of the Query Interval, 31.
Starting Query Count This field sets the number of queries sent out on startup, using the Startup Query Interval. The
default value is equal to the Robustness Variable, 2.
Figure 2- 21 IGMP Edit Page
Static Routing
The Static Routing submenu maintains the static routing table associated with the receiver. Each receiver can support
up to 32 static routes. The routing subsystem determines where outgoing unicast IP packets are sent and applies to all
IP packets, regardless of the network interface they originated from.
Static unicast routing is done using the Linux route facility. Additional information can be obtained online with the
manual at sites such as http://www.linuxcentral.com (Linux Man Pages, Administrative and Privileged commands).
Additionally, you can contact IDC Customer Service for additional information (see Chapter 3).
Packets are routed according to the following rules:
1. IP packets can originate from any of the available network interfaces and are processed by the receiver in
accordance with the data flow in Figure 2- 12.
2. Routes allow IP packets to be routed out a gateway, according to the destination address and netmask.
3. Packets addressed to a device on a receiver subnet are sent out on the applicable physical network to which
the receiver is attached.
4. Packets addressed to the global (i.e. limited broadcast) address are sent out on all the applicable physical
networks to which the receiver is attached.