Owners Manual

Working with VLAN Domains | VLAN Visualization
OMNM 6.5.2 User Guide 677
Cascade VLAN Domain Assignment
In order to simpify assignment of equipment to VLAN Domains, is the concept of "Cascade"
assignment. The "Cascade" option can be selected when executing the "Assign to VLAN Domain"
action.
When this option is selected, the VLAN Domain Assignment will cascade throughout all other
VLAN ports on a given device, and all devices linked to that one. The manner in which it cascades
will depend on the initial point (port/interface, or device) that the cascade was started from.
If you have selected a port/interface to initiate the cascade, the following will occur:
• All VLANs that port/interface are members of will be considered to be "in play" for the
cascade. For example, if it is an access port, and it is only on VLAN30, then only VLAN30 will
be considered during the cascade. If, however, it is a trunk port, and it is a member of VLANs
10, 20, and 30, all three of those VLANs will be "in play".
• The selected port/interface will be assigned to the specified VLAN Domain.
• All other ports/interfaces, on the same device as the initially selected port/interface -
that
share at least one VLAN with the initially selected port/interface
- will also be assigned to
specified VLAN Domain.
• The cascade will then look for other devices that are linked to the device that the initially
selected port/interface is on, and check to see if VLAN data (for any of the VLANs in play) is
going over those links (VLAN data is assumed to be going over a link if both ends of the link
have at least one shared VLAN).
• If a linked device is determined to be in the same VLAN, the cascade process will continue on
that device, and branch out from there.
If you have selected a device to initiate the cascade, the following will occur:
• ALL VLANs that are present on that device will be considered "in play" for the cascade. If, for
example, VLANs 10, 20, and 30 are present on the selected device, VLANS 10, 20, and 30 will
be considered "in play".
• That top level device will be assigned to the specified VLAN Domain.