Extreme Networks EPICenter 6.0, Справочное руководство

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Administering EPICenter
EPICenter Reference Guide
368
External Connections Properties
When you select External Connections Properties from the drop-down menu field at the top of the
properties panel, you can set the following properties:
MAC Polling Properties
MAC Address polling is used to identify edge ports and get the status of the devices on those ports.
MAC Polling must be enabled in order to see the Edge Port FDB display in the Inventory Manager and
Device Properties displays, and to enable a database-only search in the IP/MAC Address Finder applet.
EPICenter implements MAC Address polling using Telnet to retrieve FDB and ARP table data from the
affected devices (devices that support FDB polling and for which FDB polling has been enabled in the
Inventory Manager). Telnet requests are initiated in sets—requests are sent to groups devices
simultaneously. A MAC address polling
cycle is complete when these multiple sets of requests have
resulted in the retrieval of FDB table data from all eligible devices. Once a polling cycle is complete, a
new polling cycle is started.
Individual devices are polled once in each MAC address polling cycle. The interval between polls of the
FDB on a given device (the length of time before FDB data is refreshed) is a function of the number of
devices being polled per cycle, and the interval between the sets of Telnet polls in a complete polling
cycle.
EPICenter calculates the interval between sets of Telnet requests dynamically, based on the length of
time it took for the previous set of Telnet requests to complete. EPICenter assumes that if a set of Telnet
requests takes a long time to complete, it means the EPICenter server is more heavily loaded than if the
requests complete quickly.
The System Load setting tells EPICenter whether the calculated interval between sets of Telnet requests
should be relatively longer or shorter compared to the perceived EPICenter server load. EPICenter uses
the System Load setting, in conjunction with the time it took for the last set of Telnet requests to
complete, to determine how long to wait before issuing the next set of Telnet requests.
Load Information from http://
www.extremenetworks.com A check in this box specifies that EPICenter can automatically connect to the
Extreme Networks web site to update image information using an external (web)
connection.
The external connection is used by EPICenter to query the Extreme Networks web
site for the latest versions of ExtremeWare software images and BootROM images.
It uses this information to determine if the versions running in your switches are
current, or are obsolete. This information is shown in the Firmware Manager.
This also determines the latest version and patch level of the EPICenter software,
and compare the information to the version currently running. If a newer version is
available, it is noted on the basic status page, displayed when you first launch
EPICenter.
If you selected Yes to the Automatic Information Updates question when you
installed the EPICenter server, this property will be enabled.
HTTP Proxy Device The IP address or hostname of an HTTP proxy device used to connect to the
Extreme Networks web site if your network uses a firewall. When an HTTP proxy is
configured, all HTTP connections are made through the proxy server rather than
directly to Extreme Networks.
HTTP Proxy Port The port number for the HTTP Proxy, used to connect to the Extreme Networks
web site if your network uses a firewall.