SNMP community string change practice

Products

• CA Network Flow Analysis (NetQos / NFA)

Issue/Introduction

What is the best practice in DX NetOps Network Flow Analysis to handle a global community string change?

We will be changing the SNMP string on all the devices/routers in DX NetOps Network Flow Analysis.

If we add the new string to the DX NetOps Portal list in the profile, will DX NetOps Network Flow Analysis still be able to poll them?

Will we have to perform anything on each device?

This knowledge base article outlines the steps to assign SNMP profiles in DX NetOps Network Flow Analysis.

SNMP (Simple Network Management Protocol) profiles are essential for monitoring and managing network devices efficiently.

Environment

RA/NFA all versions

Resolution

There are different ways we can refresh the SNMP profile within DX NetOps Network Flow Analysis.

i) NetOps Portal 

ii) OData

iii) Database query

a) Fetch Router ID:

• Method: GET request via a REST client
• Endpoint: http://127.0.0.1:8981/odata/api/routers
• Credentials: Username/password - admin/admin (password varies)
• Purpose: Retrieve the unique identifier (Router ID) for the target router.

b) Perform SNMP Refresh:

• Method: POST request via a REST client
• Endpoint: http://127.0.0.1:8981/odata/api/routers/{RouterID}/com.ca.nfa.snmprefresh
• Purpose: Refresh SNMP information for an individual router.
• Response: JSON response indicating the refresh status and details of the refreshed router and interfaces.

c) Bulk Edit (Global SNMP String Change):

• Method: Execute SQL commands via a DOS prompt
• NFA 9.3.3:
  1. Add SNMP community string to NetOps Portal.
  2. Update routers with the new SNMP string.
  3. Execute SQL commands:
     mathematica

      

     mysql -P3308 -D poller -t -e "update routers set profileid=0;"

     mysql -P3308 -D poller -t -e "update routers set State='InitialPoll', stateretry=0, reboottime=0;"

      
• NFA 9.3.6+ / NetOps:
  1. Add SNMP community string to NetOps Portal.
  2. Update routers with the new SNMP string.
  3. Execute SQL commands:
      

     mysql -P3308 -D harvester -unetqos -pnetqos -t -e "update routers set profileid=0;"

     mysql -P3308 -D harvester -unetqos -pnetqos -t -e "update routers set pollState='InitialPoll', stateretry=0, reboottime=0;"

      
• Note: Allow some time for the database to update.

d) Edit Bulk via OData API:

• i) GET Data:
  • Endpoint: http://127.0.0.1:8981/odata/api/routers
  • Purpose: Retrieve profile ID and domain ID for routers.
• ii) POST Request:
  • Endpoint: http://127.0.0.1:8981/odata/api/routers/com.ca.nfa.odata.editRouters
  • Payload: JSON payload specifying Router IDs, domain ID, and profile ID.
• iii) Validation:
  • Individual Router:
    • GET request: http://127.0.0.1:8981/odata/api/routers/{RouterID}
  • All Routers:
    • GET request: http://127.0.0.1:8981/odata/api/routers

 

Additional Information

Reference - 

SNMP String Refresh