IPSec Route Based Session Down in NSX Edge alarm

Products

• VMware NSX

Issue/Introduction

Title: Alarm for ipsec_route_based_session_down
Event ID: vpn.ipsec_route_based_session_down
Alarm Description

The route based IPsec VPN session <Session UUID> is down.

• Impact: Datapath traffic stops working for configured local and remote networks.

Environment

VMware NSX-T Data Center
VMware NSX

Edge Form factors:

• Bare Metal Edge
• VM Edge

Cause

 Alarm is raised when a particular Route Based IPSec VPN Session with UUID <Session UUID> is Down. 

Resolution

Recommended Action:

• Get the session down reason from UI/API/CLI:
  • Login to the NSX Manager UI, go to Networking Tab --> VPN --> IPSec Sessions and check particular session Status.
    Check IKE Status info icon, which will show session status along with the reason for the session being down.
    
    
  • For API, to get the session status details and fail_reason, use following:
    
    3.0.0 and higher 
    GET /policy/api/v1/infra/tier-0s/{tier-0-id}/ipsec-vpn-services/{service-id}/sessions/{session-id}/statistics
    GET /policy/api/v1/infra/tier-1s/{tier-1-id}/ipsec-vpn-services/{service-id}/sessions/{session-id}/statistics
    
    4.2 and higher
    GET /policy/api/v1/orgs/{org-id}/projects/{project-id}/infra/tier-1s/{tier-1-id}/ipsec-vpn-services/{service-id}/sessions/{session-id}/statistics
    
    9.1 and higher
    GET /policy/api/v1/orgs/{org-id}/projects/{project-id}/transit-gateways/{transit-gateway-id}/ipsec-vpn-services/{service-id}/sessions/{session-id}/statistics 
    
    In the above output, you will get to know the possible cause for the IPSec session / tunnel being down.
    
    
  • For CLI, use "get ipsecvpn session summary", "get ipsecvpn session sessionid <session-id>" CLIs to check the down reason.
• As per the down reason, check the necessary actions to resolve the alarm in table mentioned at Alarms When an IPsec VPN Session or Tunnel Is Down.

Maintenance window required for remediation? No

Additional Information

Alarms When an IPsec VPN Session or Tunnel Is Down