EtherChannels/PortChannels not getting discovered for Nexus devices via SNMP discovery

Products

• VMware Smart Assurance

Issue/Introduction

Discovered a Nexus device in Smarts via SNMP and it doesn't detect/discover Port Channels.

 

Environment

SMARTS - 10.1.x

Cause

• In Smarts, by default ,the device certification for Nexus devices has CLI driver to check for EtherChannel discovery.
• SNMP discovery will not check for EtherChannel discovery.

Resolution

• Below workaround can be implemented if CLI access to device from Smarts is not permitted and only SNMP discovery is possible.
• Smarts make use PAGP or LAGP MIB for creating AggregatePorts/PortChannel/EtherChannel.
• PAGP MIB OIDs:

  .1.3.6.1.4.1.9.9.98.1.1.1.1.1
  
  .1.3.6.1.4.1.9.9.98.1.1.1.1.817

• LAGP MIB OIDs:
  

  .1.2.840.10006.300.43.1.1.1.1.8
  .1.2.840.10006.300.43.1.1.1.1.2
  .1.2.840.10006.300.43.1.1.1.1.4
  .1.2.840.10006.300.43.1.2.1.1.13
  .1.2.840.10006.300.43.1.2.1.1.9
  .1.2.840.10006.300.43.1.2.1.1.3
  .1.2.840.10006.300.43.1.2.1.1.17
  .1.2.840.10006.300.43.1.2.1.1.14

• Make sure either of the above MIBs is enabled on the device SNMP configuration.
  
  
• If the above OIDs are available in device configuration, implement the below steps in Smarts IP installation:
  a) Navigate to <Basedir>/IP/smarts/bin

         b) Use sm_edit to open DISCOVERY_GENERIC.import file:
      ./sm_edit ../conf/discovery/DISCOVERY_GENERIC.import

         c) As per the Nexus device model/series present in your Smarts topology, implement the below changes required:

 

• To enable Aggregate Port discovery on Nexus 7k devices:
• Search for "Nexus7K-Selector"
• You will find code snippet as below:

     GA_Selector::Null-Nexus7K-Selector {
  
                 selector = ".1.3.6.1.4.1.9.12.3.1.3.612|.1.3.6.1.4.1.9.12.3.1.3.777|.1.3.6.1.4.1.9.12.3.1.3.932"
  
                 Driver = GA_NullDriver::Null-Nexus7K-Driver
  
                  },

• Change the following line:

Driver = GA_NullDriver::Null-Nexus7K-Driver   

to below:   

Driver = GA_CompoundDriver::EtherChannel-Generic-Driver

• To enable Aggregate Port discovery on Nexus 6k devices:
• Search for "Nexus6K-Selector"
• You will find code snippet as below:

     GA_Selector::Null-Nexus6K-Selector {
  
                 selector = ".1.3.6.1.4.1.9.12.3.1.3.847|.1.3.6.1.4.1.9.12.3.1.3.899|.1.3.6.1.4.1.9.12.3.1.3.1062"
  
                 Driver = GA_NullDriver::Null-Nexus6K-Driver
  
                  },

• Change the following line: 

• Driver = GA_NullDriver::Null-Nexus6K-Driver
  
     to below:
  
     Driver = GA_CompoundDriver::EtherChannel-Generic-Driver

• To enable Aggregate Port discovery on Nexus 5k devices:
• Search for "Nexus5K-Selector"
• You will find code snippet as below:

     GA_Selector::Null-Nexus5K-Selector {
  
                  selector = ".1.3.6.1.4.1.9.12.3.1.3.719|.1.3.6.1.4.1.9.12.3.1.3.798|.1.3.6.1.4.1.9.12.3.1.3.1008|.1.3.6.1.4.1.9.12.3.1.3.1038|.1.3.6.1.4.1.9.12.3.1.3.1084"
  
                  Driver = GA_NullDriver::Null-Nexus5K-Driver
  
                   },

• Change the following line:

• Driver = GA_NullDriver::Null-Nexus5K-Driver
  
      to below:
  
      Driver = GA_CompoundDriver::EtherChannel-Generic-Driver

 

        d) Save and close the file.

        e) Restart IP domain.

        f) Delete and discover the devices.