Error: "Failed to install software on host" during NSX installation

Products

• VMware NSX

Issue/Introduction

• When configuring an ESXi host as an NSX transport node from the NSX UI , the deployment fails with the following error:
  
   

  Failed to install software on host. Unable to connect the host https://#.#.#.#/sdk
  

  
  

• Selecting the Resolve option will retry to install the NSX but eventually fails again with the same error.
• ESXi host IP is not reachable for the NSX Managers, but NSX Managers are reachable from the ESXi host
• Packet captures confirm that the ICMP reply from the ESXI host is not reaching the NSX Manager
  
  

  NSX Manager> start capture interface eth0 expression host 10.#.#.81
  08:52:40.601571 #:#:56:a5:#:# > #:#:a7:17:#:#, ethertype IPv4 (0x0800), length 98: 10.#.#.17 > 10.#.#.81: ICMP echo request, id 53421, seq 1513, length 64
  08:52:41.625569 #:#:56:a5:#:# > #:#:a7:17:#:#, ethertype IPv4 (0x0800), length 98: 10.#.#.17 > 10.#.#.81: ICMP echo request, id 53421, seq 1514, length 64
  08:52:42.649559 #:#:56:a5:#:# > #:#:a7:17:#:#, ethertype IPv4 (0x0800), length 98: 10.#.#.17 > 10.#.#.81: ICMP echo request, id 53421, seq 1515, length 64
  08:52:43.673558 #:#:56:a5:#:# > #:#:a7:17:#:#, ethertype IPv4 (0x0800), length 98: 10.#.#.17 > 10.#.#.81: ICMP echo request, id 53421, seq 1516, length 64
  08:52:44.701559 #:#:56:a5:#:# > #:#:a7:17:#:#, ethertype IPv4 (0x0800), length 98: 10.#.#.17 > 10.#.#.81: ICMP echo request, id 53421, seq 1517, length 64
  08:52:45.721550 #:#:56:a5:#:# > #:#:a7:17:#:#, ethertype IPv4 (0x0800), length 98: 10.#.#.17 > 10.#.#.81: ICMP echo request, id 53421, seq 1518, length 64
  08:52:46.745560 #:#:56:a5:#:# > #:#:a7:17:#:#, ethertype IPv4 (0x0800), length 98: 10.#.#.17 > 10.#.#.81: ICMP echo request, id 53421, seq 1519, length 64
  
  [root@ESXI:~] pktcap-uw --uplink vmnic1 --capture UplinkSndKernel,UplinkRcvKernel --ip 10.#.#.17 -o - | tcpdump-uw -enr -
  The name of the uplink is vmnic1.
  
  reading from file -, link-type EN10MB (Ethernet), snapshot length 65535
  08:27:25.568334 #:#:56:a5:#:# > #:#:a7:17:#:#, ethertype IPv4 (0x0800), length 98: 10.#.#.17 > 10.#.#.81: ICMP echo request, id 53421, seq 60, length 64
  08:27:25.568836 #:#:a7:17:#:# > 00:1c:7f:a3:6c:ec, ethertype IPv4 (0x0800), length 98: 10.#.#.81 > 10.#.#.17: ICMP echo reply, id 53421, seq 60, length 64
  08:27:26.591788 #:#:56:a5:#:# > #:#:a7:17:#:#, ethertype IPv4 (0x0800), length 98: 10.#.#.17 > 10.#.#.81: ICMP echo request, id 53421, seq 61, length 64
  08:27:26.592140 #:#:a7:17:#:# > 00:1c:7f:a3:6c:ec, ethertype IPv4 (0x0800), length 98: 10.#.#.81 > 10.#.#.17: ICMP echo reply, id 53421, seq 61, length 64
  08:27:27.619802 #:#:56:a5:#:# > #:#:a7:17:#:#, ethertype IPv4 (0x0800), length 98: 10.#.#.17 > 10.#.#.81: ICMP echo request, id 53421, seq 62, length 64
  08:27:27.620135 #:#:a7:17:#:# > 00:1c:7f:a3:6c:ec, ethertype IPv4 (0x0800), length 98: 10.#.#.81 > 10.#.#.17: ICMP echo reply, id 53421, seq 62, length 64
  08:27:28.639830 #:#:56:a5:#:# > #:#:a7:17:#:#, ethertype IPv4 (0x0800), length 98: 10.#.#.17 > 10.#.#.81: ICMP echo request, id 53421, seq 63, length 64
  08:27:28.640281 #:#:a7:17:#:# > 00:1c:7f:a3:6c:ec, ethertype IPv4 (0x0800), length 98: 10.#.#.81 > 10.#.#.17: ICMP echo reply, id 53421, seq 63, length 64
  08:27:29.663800 #:#:56:a5:#:# > #:#:a7:17:#:#, ethertype IPv4 (0x0800), length 98: 10.#.#.17 > 10.#.#.81: ICMP echo request, id 53421, seq 64, length 64

Environment

• VMware NSX-T Data Center
• VMware NSX

Cause

ESXi host IP is configured with incorrect subnet mask.

Resolution

Ensure the correct subnet is configured on the ESXi host.