Vpn Client connection goes down for no reason

[kalu]

I have configured OpenVpn client for my router, but it connects and keep for awhile and goes down for no reason. do I need some more configuration to be done?

following are in custom configuration

tls-client
remote-cert-tls server
reneg-sec 0
disable-occ
cipher aes-128-cbc
auth sha1
auth-nocache
nobind
persist-key
persist-tun

Logs are follows

Apr 17 07:43:20 ovpn-client1[9272]: OpenVPN 2.4.4 arm-unknown-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [MH/PKTINFO] [AEAD] built on Mar 24 2018
Apr 17 07:43:20 ovpn-client1[9272]: library versions: OpenSSL 1.0.2n 7 Dec 2017, LZO 2.08
Apr 17 07:43:20 ovpn-client1[9273]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts
Apr 17 07:43:21 ovpn-client1[9273]: TCP/UDP: Preserving recently used remote address: [AF_INET]45.55.5.64:1194
Apr 17 07:43:21 ovpn-client1[9273]: Socket Buffers: R=[122880->122880] S=[122880->122880]
Apr 17 07:43:21 ovpn-client1[9273]: UDP link local: (not bound)
Apr 17 07:43:21 ovpn-client1[9273]: UDP link remote: [AF_INET]45.55.5.64:1194
Apr 17 07:43:21 ovpn-client1[9273]: TLS: Initial packet from [AF_INET]45.55.5.64:1194, sid=028602fb cf9a50f3
Apr 17 07:43:21 ovpn-client1[9273]: VERIFY OK: depth=1, C=US, ST=NY, L=New York, O=Simplex Solutions Inc., OU=Vpn Unlimited, CN=server.vpnunlimitedapp.com, name=server.vpnunlimitedapp.com, emailAddress=support@simplexsolutionsinc.com
Apr 17 07:43:21 ovpn-client1[9273]: VERIFY KU OK
Apr 17 07:43:21 ovpn-client1[9273]: Validating certificate extended key usage
Apr 17 07:43:21 ovpn-client1[9273]: ++ Certificate has EKU (str) TLS Web Server Authentication, expects TLS Web Server Authentication
Apr 17 07:43:21 ovpn-client1[9273]: VERIFY EKU OK
Apr 17 07:43:21 ovpn-client1[9273]: VERIFY OK: depth=0, CN=openvpn2.vpnunlimitedapp.com
Apr 17 07:43:22 ovpn-client1[9273]: Control Channel: TLSv1.2, cipher TLSv1/SSLv3 ECDHE-RSA-AES256-GCM-SHA384, 4096 bit RSA
Apr 17 07:43:22 ovpn-client1[9273]: [openvpn2.vpnunlimitedapp.com] Peer Connection Initiated with [AF_INET]45.55.5.64:1194
Apr 17 07:43:23 ovpn-client1[9273]: SENT CONTROL [openvpn2.vpnunlimitedapp.com]: 'PUSH_REQUEST' (status=1)
Apr 17 07:43:28 ovpn-client1[9273]: SENT CONTROL [openvpn2.vpnunlimitedapp.com]: 'PUSH_REQUEST' (status=1)
Apr 17 07:43:28 ovpn-client1[9273]: PUSH: Received control message: 'PUSH_REPLY,redirect-gateway def1,dhcp-option DNS 10.200.0.1,reneg-sec 0,rcvbuf 262144,sndbuf 262144,ping 5,ping-exit 30,route 10.200.0.1,topology net30,ifconfig 10.200.0.94 10.200.0.93,peer-id 24,cipher AES-256-GCM'
Apr 17 07:43:28 ovpn-client1[9273]: Options error: option 'reneg-sec' cannot be used in this context ([PUSH-OPTIONS])
Apr 17 07:43:28 ovpn-client1[9273]: OPTIONS IMPORT: timers and/or timeouts modified
Apr 17 07:43:28 ovpn-client1[9273]: OPTIONS IMPORT: --sndbuf/--rcvbuf options modified
Apr 17 07:43:28 ovpn-client1[9273]: Socket Buffers: R=[122880->245760] S=[122880->245760]
Apr 17 07:43:28 ovpn-client1[9273]: OPTIONS IMPORT: --ifconfig/up options modified
Apr 17 07:43:28 ovpn-client1[9273]: OPTIONS IMPORT: route options modified
Apr 17 07:43:28 ovpn-client1[9273]: OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified
Apr 17 07:43:28 ovpn-client1[9273]: OPTIONS IMPORT: peer-id set
Apr 17 07:43:28 ovpn-client1[9273]: OPTIONS IMPORT: adjusting link_mtu to 1625
Apr 17 07:43:28 ovpn-client1[9273]: OPTIONS IMPORT: data channel crypto options modified
Apr 17 07:43:28 ovpn-client1[9273]: Data Channel: using negotiated cipher 'AES-256-GCM'
Apr 17 07:43:28 ovpn-client1[9273]: Outgoing Data Channel: Cipher 'AES-256-GCM' initialized with 256 bit key
Apr 17 07:43:28 ovpn-client1[9273]: Incoming Data Channel: Cipher 'AES-256-GCM' initialized with 256 bit key
Apr 17 07:43:28 ovpn-client1[9273]: TUN/TAP device tun11 opened
Apr 17 07:43:28 ovpn-client1[9273]: TUN/TAP TX queue length set to 100
Apr 17 07:43:28 ovpn-client1[9273]: do_ifconfig, tt->did_ifconfig_ipv6_setup=0
Apr 17 07:43:28 ovpn-client1[9273]: /usr/sbin/ip link set dev tun11 up mtu 1500
Apr 17 07:43:28 ovpn-client1[9273]: /usr/sbin/ip addr add dev tun11 local 10.200.0.94 peer 10.200.0.93
Apr 17 07:43:30 ovpn-client1[9273]: /usr/sbin/ip route add 45.55.5.64/32 via 192.168.0.1
Apr 17 07:43:30 ovpn-client1[9273]: /usr/sbin/ip route add 0.0.0.0/1 via 10.200.0.93
Apr 17 07:43:30 ovpn-client1[9273]: /usr/sbin/ip route add 128.0.0.0/1 via 10.200.0.93
Apr 17 07:43:30 ovpn-client1[9273]: /usr/sbin/ip route add 10.200.0.1/32 via 10.200.0.93
Apr 17 07:43:30 openvpn-routing: Configuring policy rules for client 1
Apr 17 07:43:31 ovpn-client1[9273]: Initialization Sequence Completed
Apr 17 08:00:00 syslog: VPN_LOG_NOTE: 90: VPN Client 1 already running...
Apr 17 08:03:52 ovpn-client1[9273]: [openvpn2.vpnunlimitedapp.com] Inactivity timeout (--ping-exit), exiting
Apr 17 08:03:53 ovpn-client1[9273]: vpnrouting.sh tun11 1500 1553 10.200.0.94 10.200.0.93 init
Apr 17 08:03:53 openvpn-routing: Configuring policy rules for client 1
Apr 17 08:03:53 ovpn-client1[9273]: /usr/sbin/ip route del 10.200.0.1/32
Apr 17 08:03:53 ovpn-client1[9273]: ERROR: Linux route delete command failed: external program exited with error status: 2
Apr 17 08:03:53 ovpn-client1[9273]: /usr/sbin/ip route del 45.55.5.64/32
Apr 17 08:03:53 ovpn-client1[9273]: /usr/sbin/ip route del 0.0.0.0/1
Apr 17 08:03:53 ovpn-client1[9273]: ERROR: Linux route delete command failed: external program exited with error status: 2
Apr 17 08:03:53 ovpn-client1[9273]: /usr/sbin/ip route del 128.0.0.0/1
Apr 17 08:03:53 ovpn-client1[9273]: ERROR: Linux route delete command failed: external program exited with error status: 2
Apr 17 08:03:53 ovpn-client1[9273]: Closing TUN/TAP interface
Apr 17 08:03:53 ovpn-client1[9273]: /usr/sbin/ip addr del dev tun11 local 10.200.0.94 peer 10.200.0.93
Apr 17 08:03:53 ovpn-client1[9273]: SIGTERM[soft,ping-exit] received, process exiting