3Com 3C16405, User Manual

Page: 119 / 188

DUA1640-5AAA02
Solving Problems With an SNMP Network Management Application 8-5
Solving Problems
With an SNMP
Network
Management
Application
The SNMP network management application cannot access the
stack.
Check that:
■
The stack’s IP address, subnet mask and default router are correctly
configured, refer to “Giving the Stack an IP Address” on page B-9.
■
The stack has been reset.
■
The stack’s IP address is correctly recorded by the management
application. For information on how to do this, refer to the
documentation accompanying the application.
■
SNMP Access has not been disabled for the access level you are
using to manage the stack. Use the Access Information panel of
the General Info dialog box in Quick Config Manager, refer to
Appendix B.
■
For management communication to work over the network, the
port through which your communication reaches the stack must be
connected to segment 1 (either directly or indirectly) of the hub with
the IP address configured. For information, refer to “Requirements
for Managing Over the Network” on page 5-6.
Traps are not received by the SNMP network management
application.
Check that the address of the management station is
entered in the stack. You can do this using Quick Config Manager;
refer to “Giving the Stack an IP Address” on page B-9.
The SNMP network management application can no longer
access the stack.
Check that the port through which you are trying to
access the stack has not been disabled. If it is enabled, check the
connections and network cabling at the port. Try accessing the stack
through a different port. If you can now access the stack, a problem
with the original port is indicated, or it has been switched from
segment 1 to another segment. Re-examine the connections and
cabling.
Possibly there is a network problem preventing you from accessing the
stack over the network. Try accessing the stack through the console
port of one of the hubs, and reset the stack.
If you still cannot access the hub, use the Access Information panel of
the General Info dialog box in Quick Config Manager to check if SNMP
access is enabled, refer to Appendix B.