Summit WM3000 Series Controller System Reference Guide 501
Web UI is Sluggish, Does Not Refresh Properly, or Does Not Respond
When configuring the controller, it is easy to overlook the fact that the host computer is running the
browser while the Extreme Networks wireless LAN controller is providing the data to the browser.
Occasionally, while using the Web UI the controller does not respond or appears to be running very
slow; this could be a symptom of the host computer or the network, and not the controller itself. The
table below provides suggestions to troubleshoot this issue.
Console Port is Not Responding
The Extreme Networks wireless LAN controller console port is connected to the host computer’s serial
port, but pressing the [Enter] key gets no response from the controller.
The table below provides suggestions to troubleshoot this issue.
Possible Problem Suggestions to Correct
Bad connection between
controller and console
system
Verify the line between the controller and the host computer is
functioning normally
Slow transmission of data
packets
Verify the data packets are being sent to and from the controller using a
sniffer tool
Access points may try to
adopt while country code
is not set
Set the country name for the controller, which is set to “none” by
default
Packet storm Check Syslog for any type of a packet storm
Overburdened with a
large number of Access
Points
With large numbers of Access Points, changing the configuration quickly
may cause the controller to not refresh properly, at least immediately
following configuration.
Java JRE is out of date Be sure you are using Sun Java JRE 1.5 or later. To download the
appropriate for your system go to:
http://www.sun.com/java/
Cannot access Web UI
through a Firewall
To successfully access the controller Web UI through a firewall, UDP
port 161 must be open in order for the controller’s SNMP backend to
function
All else... Contact Extreme Networks Support
Possible Problem Suggestions to Correct
Cabling issue Ensure a console cable is connected from the console port to the host
computer’s serial port
Not using a terminal
emulation program
Verify a serial terminal emulation program, such as HyperTerminal, is in
use on the host computer
Settings in terminal
emulation program are
incorrectly set
Check the serial port settings in the serial terminal emulation program
being used. The correct settings are:
Terminal Type VT-100
Port Any COM port
Terminal Settings 19200 bps transfer rate
8 data bits
no parity
1 stop bit
no flow control
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