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Cisco Transport Manager Release 6.0 User Guide
78-16845-01
Chapter 3 Building the Network
3.5.1 Prerequisites for Adding NEs
To configure the SNMP community string, you must change the community strings on the devices
through the CLI.
Table 3-6 describes the various options involved in configuring SNMP.
3.5.1.8.2 Setting Up Nonstandard Community Strings
The standard community strings are defined as default community strings. If you change the standard
(default) community strings to a different value, the standard community strings become nonstandard.
To set up nonstandard community strings or to change a service-level password, use the NE
Authentication tab in the Domain Explorer.
Note This method affects only CTM. You must make sure that community strings and passwords within CTM
match those on the switches.
3.5.1.8.3 Changing Community Strings Using the Domain Explorer
To change the SNMP get and set community strings for selected nodes:
Step 1 In the Domain Explorer Hierarchy pane, select the node.
Step 2 In the NE Authentication tab, you can change the SNMP Community String to change the SNMP get
community string, or change the SNMP Set Only Community String.
Step 3 Click Save.
3.5.1.8.4 Changing Community Strings Using the CLI
To change the SNMP get community strings for selected nodes:
Step 1 Open a terminal window and SSH or Telnet to the switch.
Step 2 Enter the cnfsnmp command to change the SNMP get community string for the selected nodes as
follows:
xxyyzz% cnfsnmp community [ro|rw]
Table 3-6 SNMP Configuration Options
Option Description
Domain Explorer,
Network Element
Properties pane, NE
Authentication tab
After saving the community strings information, the CTM processes use the new community strings
for SNMP accesses.
Since users must configure the community strings on both the devices through CLI, and at the CTM
stations through the Domain Explorer, there is a possibility of typing in mismatched community
strings. This results in the node with the mismatched community strings becoming either not
discovered or unreachable to CTM.
Note Configured community strings cannot contain underscore (_) or ampersand (@) characters.
Also, spaces are not allowed in community strings and service-level passwords.
SNMP access security Enter the cnfsnmp command on CTM by using a secured shell to change the community strings and
passwords.