Chapter 8 Advanced Configuration for Compex CGX3224
45
The membership of a host group is dynamic - hosts may join and leave groups at any
time. There is no restriction on the location or number of members in a host group. A
host may be a member of more than one group at a time. A host need not be a member
of a group to send datagrams to it.
Description of parameters
Host Group Addresses
Host groups are identified by class D IP addresses, i.e.,
those with "1110" as their high-order four bits. Class E IP
addresses, i.e., those with "1111" as their high-order four
bits, are reserved for future addressing modes.
In Internet standard "dotted decimal" notation, host group
addresses range from 224.0.0.0 to 239.255.255.255. The
address 224.0.0.0 is guaranteed not to be assigned to any
group, and 224.0.0.1 is assigned to the permanent group of
all IP hosts (including gateways). This is used to address
all multicast hosts on the directly connected network.
There is no multicast address (or any other IP address) for
all hosts on the total Internet. The addresses of other well-
known, permanent groups are to be published in "Assigned
Numbers".
Procedures
1. Select IGMP Config from the Command window.
2. Choose enabled in the IGMP state field.
3. Click on the radio button to select the version for IGMP. Refer to the next
section for the explanation on IGMP v1.0 and v2.0
4. Hit on the Apply button and save your setting.
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