Model : TL-ER6120

Hardware Version :

Firmware Version : 2.0.1 Build 20170609 Rel.58445

ISP : [/COLOR]

TL-ER6120 V2 router has IP Sec LAN to LAN VPN. router gateway ip not ping from vpn but other connected computer is replying. I thin Router is not responding to ICMP. how to resolve this??