User manual

Creating Multicast VLANs
Page 23-5
Step A. Entering Basic Information
1. To begin setting up a multicast VLAN type crmcvl at any prompt.
2. The following prompt displays:
Enter the VLAN Group id for this VLAN ( 1):
Enter the number for the Group to which this multicast VLAN will belong.You can create
up to 32 multicast VLANs and up to 31 AutoTracker VLANs in a single Group.
3. The following prompt displays:
Enter the VLAN Id for this VLAN ( 5):
Enter the number that will identify this multicast VLAN within the Group specified above.
Up to 32 multicast VLANs may belong to the same Group. By default the system displays
the next available VLAN ID number.
♦ Note ♦
Unlike AutoTracker
VLANs, you can configure rules for
the multicast VLAN #1. There is not a default multicast
VLAN, so multicast VLAN #1 is treated the same as the
other 31 possible multicast VLANs.
Press
<Enter> to accept this default.
4. The following prompt displays:
Enter the new VLAN’s description:
Enter a textual description that will help you identify the multicast VLAN. For example, if
you know this multicast VLAN will be composed of only workstations receiving CNN news
feeds, you might call the multicast VLAN “CNN MVLAN.” You may use up to 30 characters
for this description.
5. The following prompt displays:
Enter the Admin Status for this vlan (Enable (e) / Disable (d):
Enter whether or not you want the Administrative Status for this multicast VLAN to be
enabled or disabled. Once enabled, the switch begins using the policies you defined. A
disabled multicast VLAN is still defined (name, number, policies intact), but the switch
keeps the multicast
VLAN disabled. The enable/disable status may be changed at a later
time using the
modmcvl command.
♦ Note ♦
A multicast VLAN may not always be operational even
when its Admin Status is enabled. A multicast VLAN’s
operation may be disabled by its switches because
devices in the multicast VLAN cease transmitting data,
among other reasons.
After you enter the administrative status, additional prompts display that allow you define
the multicast address. See the next section, Step B. Defining the Multicast Address on page
23-6 for further instructions.