Creating Multicast VLANs
Page 23-6

Step B. Defining the Multicast Address

The multicast address is an address that identifies a multicast traffic stream, such as CNN
News.
♦ Please Take Note ♦
The source port of the multicast traffic (i.e., the port
through which multicast traffic enters the switch) can
be a member of any Group. The source port does not
need to be a member of the same Group as recipient
ports. Note that the source port does not become a
member of the multicast VLAN.
1. After you enter the administrative status for this multicast VLAN, the following prompt
displays:
Configure the Multicast Address Rule
Set Rule Admin Status to [(e)nable/(d)isable} (d):
Indicate whether you want to enable or disable this multicast Address Rule. If you enable
this rule, AutoTracker will use the address to flood multicast traffic. Enter an E (enable) or
a D (disable) and press <Enter>.
If you disable the rule, then this address will not be used to flood multicast traffic, but the
parameters you set up will be saved. This Admin Status is different from the Admin Status
for the multicast VLAN as it controls only this specific rule within this specific multicast
VLAN. You can enable or disable the rule at a later time using the modmcvl command.
2. The following prompt displays:
Enter the Multicast addresses (AABBCC:DDEEFF) in Canonical format
.
(Enter save to end):
Enter one or more multicast addresses, separated by spaces. The address must be a multi-
cast address. If you enter to many characters, the system truncates the address. The switch
will flood all traffic from the address(es) you specify here to the ports and/or MAC
addresses you define as recipients in Step C.
All multicast MAC addresses must consist of 12 hex digits. In all valid multicast addresses,
the least significant bit of the most significant byte is set to 1. Addresses with this bit unset
will be rejected.
Structure of Multicast Address
When you have entered the final MAC address press <Enter>, and type save at the prompt.
Next, a menu displays prompting you to select the rules governing membership in this
multicast VLAN. Go on to the next section, Step C. Defining the Recipients of Multicast
Traffic on page 23-7 to continue setting up this multicast VLAN.
xxxxxxx1
least significant bit
must be set to 1
Most Significant Byte