User guide

ExtremeWare EPICenter Software Installation and User Guide 12-7
Displaying a Network Topology View
A decorative node shows the following information:
• Thenameordescriptionofthenode,whichcanbeedited
• A decorative node icon, as shown in Figure 12-6
Text Nodes: A text map node is a single-line text field that can be placed anywhere in a
network map. It can be usedto create a title for the map, additional annotations for other
map elements, comments, and so on.
Links: Alink representsconnectivitybetween nodesin the map.When a link connects two
devices on the same map, the link will be annotated withthe port number or slot and port
number for each of the endpoints, as shown in Figure 12-7. When an endpoint is not
known(the link terminates in a L2 cloud) the unknown port is indicated with a question
mark. The link also shows the following information:
The width of the link indicates the link type:
— A thick line indicates a gigabit link
— A thin line indicates a 10/100 link
The color of the link indicates the link status:
— A green line indicates that the link is UP
— A red line indicates that the link is DOWN
— A grey line indicates that the status is unknown
Figure 12-7: Example of a gigabit link showing endpoint connectivity and Up status
If RMON statistics are enabled for the map, then link utilization (as a percentage of link
capacity) will be displayed for each port on a link between devices that have RMON
enabled in the device. The utilization is updated at the nominal RMON rate as set in the
switch—typicallyevery30seconds.Thedefault is thatRMONstatistics arenotenabled for
a map.To enable the display of RMON statistics, see “Setting Map Properties” on
page 12-23.
If RMON statistics are not enabled in the switch, then no statistics will be displayed,
even if you enable the display of RMON statistics for the map.