METRObility Optical Systems 8124-01-M - Manual (Page 130)

130 CenturyStack 8100 Managed Hub
Troubleshooting the Network
Q: The local-console ‘login screen’ does not come up sometimes when a
terminal (PC running terminal emulation) is connected to already
booted master hub. Why?
A: The screen must be refreshed, when CenturyStack is running and the
terminal emulator is started. Pressing Ctrl + R refreshes the screen
and the login menu appears.
Q: Users of the 100Mbps segment cannot use Web-Based Management,
however 10Mbps segment users can. Why?
A: The SNMP agent, TCP/IP stack and the Web engine are implemented
on the 10Mbps bus of the master hub. Therefore the 10Mbps
segment must be used for Web-Based Management in the absence
of a switch module.
Q: Even though the switch module with internal bridging has been
installed, the 10Mbps segments can’t communicate with the
100Mbps segments. Why?
A: The switching function is disabled by default in the software, there-
fore even though the internal function is enabled with the on board
jumpers, 10Mbps and 100Mbps segments cannot communicate. The
internal switch must be enabled using local console management
through connections from the RS-232 port on the hub to a serial port
on a PC. Select Device Control from the main menu and then 2/3 port
bridge module control/status. Enable the internal switch.
Q: With regards to CenturyStack modules: Users will need to use Web
or Console management to enable the module, however, what if users
only have a slave model in their LAN and want to install a 8102-01 as
an internal switch or have a 8103-01 as both internal and external, or
have another slave model in the stack and one 8102-01 as an external
switching port?
A: In the case of 8112-01-S only, (whether single or multiple stacked),
the switch module will function straightaway when installed. The
mode (“internal” or/and “external”) can be set on the module PCB
using the jumpers provided. When the master hub is present, we need
to additionally enable the module’s function in the management
software (through Local Console or Web-Based Management/SNMP
Management).