3Com SuperStack II Switch 3000 10/100, User Manual

Page: 125 / 150

Using the Switch C-3
Check that the port through which you are trying to
access the device is in VLAN 1 (the Default VLAN).
Refer to
“Setting up VLANs on the Switch 3000
10/100” on page 5-8 .
Try accessing the device through a different port. If
you can now access the device, a problem with the
original port is indicated. Re-examine the connec-
tions and cabling.
There may be a network problem preventing you
accessing the device over the network. Try access-
ing the device through the console port.
You forget your password and cannot log on:
If you are not one of the default users (monitor,
manager or security), another user having
security
access level can log on, delete your user name, and
create a new user name for you, with a new pass-
word.
Alternatively, another user having
security
access
level can log in and initialize the device. This will
return all configuration information, including pass-
words, to the initial values.
In the case where no-one knows a password for a
security level user, contact your supplier.
Using the Switch
You see network problems and the Packet LED
is on continuously with constant collisions
(refer to
“Port Traffic Statistics” on page 6-5 ):
You are using PACE equipped devices and have the
Interactive Access feature of PACE enabled at both
ends of the link. Interactive Access must only be
enabled at one end of the Switch–device link. Dis-
abling Interactive Access for a Switch port is
described in
“Setting Up the Switch Ports” on page
4-12 .
You have configured a Switch port so that it
‘blips’ when a broadcast storm occurs, but the
port does not blip properly:
The broadcast storms are occurring such that the
average broadcast bandwidth cannot drop below
the Falling Threshold value. This means that the
blip only occurs once.
Try changing the following attributes in the Broad-
cast Storm Control section of the Port Setup screen:
■
Rising Action to disable port/notify.
■
Falling Action to event + enable.
For more information, refer to “Setting Up the
Switch Ports” on page 4-12 .