SSL VPN-Plus MAC client connects but no traffic is passing through

Products

• VMware NSX for vSphere

Issue/Introduction

• SSL vpn client connects but the traffic doesn't reach the private network.
• On the client tcpdump -i en1 -n host <sslvpn serverip>, we see network traffic for the destination.
• On the Edge gateway, entries similar to below can be seen: 

Edge01-0> show interface na0
Interface na0 is up, line protocol is up
index 14 metric 1 mtu 1500 <UP,BROADCAST,RUNNING,MULTICAST>
inet6 fe80::34a1:####:####:####/64

inet <ipv4 ip> << is missing proxy_arp: disabled
Full-duplex, 10Mb/s
input packets 0, bytes 0, dropped 0, multicast packets 0
input errors 0, length 0, overrun 0, CRC 0, frame 0, fifo 0, missed 0
output packets 4, bytes 520, dropped 0
output errors 0, aborted 0, carrier 0, fifo 0, heartbeat 0, window 0
collisions 0

Environment

VMware NSX for vSphere 6.3.x
VMware NSX for vSphere 6.4.x

Resolution

To resolve the issue,

1. Connect to vCenter -> Network and Security -> NSX Edges -> <edge> -> manage -> sslvpn plus -> ip pool
2. Remove the pool and recreate the ip pool.
3. The new configuration is published and the na0 contains ipv4 gateway from ip pool.

Edge01-0> show interface na0
Interface na0 is up, line protocol is up
index 14 metric 1 mtu 1500 <UP,BROADCAST,RUNNING,MULTICAST>
inet6 fe80::34a1:####:####:####/64
inet 192.#.#.#/24 <-- Previously was missing
proxy_arp: disabled
Full-duplex, 10Mb/s
input packets 0, bytes 0, dropped 0, multicast packets 0
input errors 0, length 0, overrun 0, CRC 0, frame 0, fifo 0, missed 0
output packets 4, bytes 520, dropped 0
output errors 0, aborted 0, carrier 0, fifo 0, heartbeat 0, window 0
collisions 0