4-5
Catalyst 2950 Desktop Switch Software Configuration Guide
78-11380-03
Chapter 4 General Switch Administration
SNMP Network Management Platforms
The bulk retrieval mechanism retrieves tables and large quantities of information, minimizing the
number of round-trips required. The SNMPv2C improved error-handling includes expanded error codes
that distinguish different kinds of error conditions; these conditions are reported through a single error
code in SNMPv1. Error return codes now report the error type.
Three kinds of exceptions are also reported: no such object exceptions, no such instance exceptions, and
end of MIB view exceptions.
You must configure the SNMP agent to use the version of SNMP supported by the management
station.An agent can communicate with multiple managers; for this reason, you can configure the
software to support communications with one management station using the SNMPv1 protocol and
another using the SNMPv2 protocol.
Using FTP to Access the MIB Files
You can obtain each MIB file with this procedure:
Step 1 Use FTP to access the server ftp.cisco.com.
Step 2 Log in with the username anonymous.
Step 3 Enter your e-mail username when prompted for the password.
Step 4 At the ftp> prompt, change directories to /pub/mibs/supportlists.
Step 5 Change directories to this:
• wsc2950 for a list of Catalyst 2950 MIBs
Step 6 Use the get MIB_filename command to obtain a copy of the MIB file.
You can also access this server from your browser by entering this URL in the Location field of your
Netscape browser (the Address field in Internet Explorer):
ftp://ftp.cisco.com
Use the mouse to navigate to the folders listed above.
Using SNMP to Access MIB Variables
The switch MIB variables are accessible through SNMP, an application-layer protocol facilitating the
exchange of management information between network devices. The SNMP system consists of these
parts:
• The SNMP manager, which resides on the network management system (NMS)
• The SNMP agent, which resides on the switch
• The MIBs that reside on the switch but that can be compiled with your network management
software
An example of an NMS is the CiscoWorks network management software. CiscoWorks2000 software
uses the switch MIB variables to set device variables and to poll devices on the network for specific
information. The results of a poll can be displayed as a graph and analyzed to troubleshoot
internetworking problems, to increase network performance, to verify the configuration of devices, to
monitor traffic loads, and more.
To Next Page
Loading...
Need help?
General
