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Home > Success Center > User Device Tracker (UDT) > UDT - Knowledgebase Articles > Layer 2 / Layer 3 data not visible when using SNMPv3

Layer 2 / Layer 3 data not visible when using SNMPv3

Overview

This article provides brief information and steps to resolve the issue when layer 2 / layer 3 data are not visible when using SNMPv3. In UDT, you may receive the following Compatibility Checker error:

ERROR: 31016: Authorization Error - User does not have rights to requested MIBs 

The issue is caused when SNMP has not been configured to allow access to the required MIBs. To resolve, check and update the configuration for Cisco.

Environment

All UDT versions

Cause 

The issue is caused when SNMP has not been configured to allow access to the required MIBs.

 

Resolution

Below is a sample configuration that can be used on the Cisco Switch:

How to configure the SNMPV3 on Cisco Devices

  1. Create a view:

    snmp-server view <view-name> <mib-family-name>

    <mib-family-name> includes iso, mib-2, system, interfaces, cisco, ciscoEnvMonTemperatureStatusEntry

    Example: snmp-server view cisco iso included

  2. Group for the view:

    snmp-server group V3GroupName v3 [auth/noauth] read V3ReadName write V3WriteName

    Example: snmp-server group cisco v3 auth read cisco write cisco

    Example: snmp-server group cisco v3 noauth read cisco write cisco

  3. Create the user:

    snmp-server user V3UserName V3GroupName v3 auth [sha/md5] [password]

    Example: snmp-server user cisco cisco v3 auth md5 cisco priv aes 128 cisco

    Example: snmp-server user cisco1 cisco v3 auth sha cisco priv aes 128 cisco

    UDT supports aes 128, aes 192, and 256 encryption.

  4. Give access to the VLAN for the Group.

    Without accesslist (if the switch is configured without accesslist):

    snmp-server group cisco v3 auth context vlan- match prefix

    With access list (if the switch is configured with accesslist):

    snmp-server group cisco v3 auth context vlan- match prefix access <ACL number>

    Do not enter the VLAN context in SNMPv3 Context while adding the node in UDT. See the following screen shots for your reference.

     

     

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