Extreme Networks EPICenter 5.0, Manual, Page: 83 / 208

Graphical and HTML-based Configuration Monitoring
EPICenter Concepts and Solutions Guide 83
the switches with ports in the VLAN). The VLAN Manager also provides a graphical user interface
for creating new VLANs and adding and removing device ports to or from an existing VLAN. Due
to multi-threading, EPICenter can perform a VLAN configuration on multiple devices concurrently,
rather than having to configure each switch in a VLAN one at a time.
Once you add a device and port to the VLAN, you can have the VLAN Manager check to see if
connectivity exists between the new device and port and all the other members of the VLAN. If
additional ports are needed to establish a path to another member of the VLAN, EPICenter will
recommend the devices and ports to be added to the VLAN, and can add them to the VLAN if you
accept the recommendation.
• EPICenter’s Topology views can be used to show a topological view of the VLANs on your network.
It will show links in a VLAN that are misconfigured (where the VLAN is configured on one side of a
link but not the other). In addition, from a Topology map you can select links to add to a VLAN, or
you can select a device, and add selected edge ports on that device to a VLAN that exists on the
device.
• The use of Telnet macros enables standard VLAN configurations to be easily configured on multiple
devices without extensive administrator intervention. This is particularly useful for configuring
VLAN settings in a repeatable way on new devices that are added to the network.
• EPICenter’s VLAN reports also provide information on VLAN membership, in a form that can be
printed out if desired.
See Chapter 5, “Managing VLANs” for a more detailed discussion of EPICenter’s capabilities for
managing VLANs.
Graphical and HTML-based Configuration Monitoring
A number of EPICenter applets can be used to monitor different aspects of your network configuration
on a network-wide basis:
• The Topology applet monitors and displays layer 1 EDP connectivity between devices. It shows
information about link bandwidth and endpoint configuration, as well as the link status (up, down,
or unknown). It also identifies links configured for load sharing.
As an option, if RMON is enabled for your network devices, the Topology applet can show usage
statistics for the links on a map. Note that for RMON statistics to appear on a map, three conditions
must apply:
— RMON must be enabled on the switches shown on the map
— RMON data collection for Topology must be enabled (this is a Server Property configured in the
Admin applet, and by default is enabled).
— RMON statistics must be enabled for the specific map (this is enabled through the Map
properties)
Note that if you enable the display of RMON statistics on a map, this could add extra load to your
system due to the additional data polling.
The Topology applet can also be used to show VLAN information for links and devices. This is
discussed further in Chapter 5, “Managing VLANs”.
• The STP Monitor displays network-wide multi-device views of every STP domain. You can view
information down to the state and configuration of every device port in each STP domain.
• The ESRP Monitor shows similar information network-wide for ESRP instances—the configuration
of state of every device in each ESRP instance.