vSphere Web Client performance is slow when using NSX Manager

Products

• VMware NSX

Issue/Introduction

Symptoms:
When you are navigating in the Networking & Security using the vSphere Web Client, you experience these symptoms:

• Performance is slow
• Pages load longer than expected
• When you run the traceroute NSX-MANAGER_IP -T command, you see entries similar to:
  
  traceroute to NSX-MANAGER_IP (NSX-MANAGER_IP), 30 hops max, 40 byte packets using TCP
  Unable to look up NSX-MANAGER_IP: Temporary failure in name resolution
  1 NSX-MANAGER_IP 0.218 ms 0.275 ms 0.176 ms

Environment

VMware NSX for vSphere 6.4.x
VMware NSX for vSphere 6.3.x
VMware NSX for vSphere 6.1.x
VMware NSX for vSphere 6.0.x
VMware NSX for vSphere 6.2.x

Cause

This issue occurs when:

• DNS Server does not have Reverse DNS Lookup resolution configured for the NSX Manager IP address.
• vCenter Server is unable to resolve the NSX Manager Fully Qualified Domain Name (FQDN).

Resolution

To resolve this issue, configure the DNS server with both Forward and Reverse Lookup entries for the NSX Manager.

To configure the DNS server with both Forward and Reverse Lookup entries for the NSX Manager:

1. Log in to the DNS Manager console.
2. Create a New Host(A) Entry of NSX Manager along with associated pointer (PTR) record.
3. Open an SSH session to the vCenter Server Appliance.
4. Run this command:
   
   vi /etc/hosts
   
   Add NSX Manager IP and Host name mapping.
   
   For example:
   
   X.X.X.X vdnet-nsx1- 3729288
    
5. Save and close the /etc/hosts file.
6. Run these traceroute commands to verify that there are no name resolution issues:
   
   traceroute <NSX-MANAGER_IP> -T
   traceroute <NSX-MANAGER_FQDN> -T
    
7. Refresh the vSphere Web Client User Interface (UI).

Additional Information