Extreme Networks EPICenter Software Installation Manual page 300

Network Topology Views
Figure 146: Specifying ports for a new link connection
There are a number of restrictions that apply to the behavior of manually-created links:
• These links appear only on the map where they were created—they will not exist between the same
devices in any other view.
• These links are NOT update when the status or end-point of the real link it represents is changed. If,
due to such a change, the real link is discovered by EPICenter (for example, the endpoint is moved
to a device where EDP is enabled) a new link is created on the map in addition to the
manually-created link.
• If the device to which a manually-created link attaches is cut from the map, the link must be
manually recreated when the device is pasted back.
Discovering Links Between Devices
EPICenter will eventually discover new links between devices or rediscover links you have deleted
from the map if they are real existing links that are up. However, if you want to have EPICenter
discover new links immediately, instead of waiting for the next polling cycle, you can use the Discover
Links command.
You can also use Discover Links to remove links that no longer exist. Since EPICenter cannot
distinguish between a link that no longer exists and a link that is down, when a link is moved,
EPICenter will continue to show the obsolete link as a down link. The Discover Links command will
remove these.
To have EPICenter rediscover all existing links between devices, do the following:
• Select Discover Links from the New menu
EPICenter will add or update the links that exist between the devices on your map, and will remove
any links whose connectivity or status it cannot determine. It will also eliminate any L2 clouds that are
no longer needed.
300 EPICenter Software Installation and User Guide