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Select a configured device and open the SNMP browser from the topology toolbar.
Use a permitted SNMP version and the credentials configured on that device.
Browse the MIB tree to inspect an object’s identifier, syntax and access level.
Enter the complete instance identifier and use Get to read the device name.
GetNext reads the next available object after the supplied identifier.
Walk reads the objects below a selected branch.
GetBulk retrieves multiple results in a single operation.
A missing object is reported separately from a query rejected for invalid credentials.
Read the interface descriptions before choosing an interface index to change.
Use Get to check that interface’s administrative status before changing it.
A read-only community can read this object but cannot change its value.
With a permitted write community, set the administrative status to down.
The device console confirms that the interface is now administratively down.
Restore the interface to up, then read its status back.
Refresh repeats the last read operation, so it does not repeat the previous write.
The console and a successful ping confirm that the restored link is working.
For SNMP version three, choose a configured user and the appropriate security level.
This user can read the device name through its permitted view.
A query outside that view is denied, with the deciding view and reason shown.
Authenticated security levels require the corresponding passphrase fields.
This browser checks presence, not passphrase correctness; it does not prove encrypted SNMP authentication.
If a device has no configured agent, the MIB tree remains browsable but queries are disabled.
Finish with the changed interface restored and use permitted credentials for further queries.