NTP Sync problem after BIG IP LTM system restarted

Hi,

 

We have upgraded our LTM system to 11.5 in Feb2015 and restarted the system. After that we didnt notice NTP sync got stuck, during our recent preventive maintenance check for "Leap Second" noticed that NTP sync is not working and there is 4.35secs delay as well.

 

[root@slb101:Active:In Sync] log date Thu Jul 2 16:57:57 MMT 2015

 

[root@slb101:Active:In Sync] config ntpq -p

 

remote refid st t when poll reach delay offset jitter

*172.16.2.237 0.0.0.0 1 u 145d 64 0 2.885 6.386 0.000 +172.16.2.238 0.0.0.0 1 u 145d 64 0 2.633 6.069 0.000

 

The 145d indicates that "time since the last response to a poll was received (in seconds).. so it is almost system is running without NTP.

 

Ping/traceroute also not working towards NTP server.

 

[root@slb101:Active:In Sync] config ping 172.16.2.237 PING 172.16.2.237 (172.16.2.237) 56(84) bytes of data. From 10.32.22.172 icmp_seq=1 Destination Net Unreachable From 10.32.22.172 icmp_seq=2 Destination Net Unreachable From 10.32.22.172 icmp_seq=3 Destination Net Unreachable --- 172.16.2.237 ping statistics --- 3 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2001ms

 

[root@slb101:Active:In Sync] config ping 172.16.3.238 PING 172.16.3.238 (172.16.3.238) 56(84) bytes of data. From 10.32.22.172 icmp_seq=1 Destination Net Unreachable From 10.32.22.172 icmp_seq=2 Destination Net Unreachable From 10.32.22.172 icmp_seq=3 Destination Net Unreachable --- 172.16.3.238 ping statistics --- 3 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2001ms [root@slb101:Active:In Sync] config

 

[root@slb101:Active:In Sync] config traceroute 172.16.2.237 traceroute to 172.16.2.237 (172.16.2.237), 30 hops max, 40 byte packets 1 (10.32.22.172) 1.613 ms !N 1.839 ms !N 2.170 ms !N [root@slb101:Active:In Sync] config

 

[root@slb101:Active:In Sync] log tmsh list /sys management-route sys management-route default { gateway 172.20.129.174 network default } TCP socket open failed: Connection refused Socket error connecting to 127.0.0.1:6889 [root@slb101:Active:In Sync] log

 

[root@slb101:Active:In Sync] log tmsh list /sys management-ip sys management-ip 172.20.129.161/28 { } TCP socket open failed: Connection refused Socket error connecting to 127.0.0.1:6889 [root@slb101:Active:In Sync] log

 

I have gone through SOL7017 for this issue and as per that it is mentioned to restart the ntpd process as WA and so i did.

 

[root@slb101:Active:In Sync] log bigstart restart ntpd Shutting down ntpd: [ OK ] Starting ntpd: [ OK ]

 

[root@slb101:Active:In Sync] log [root@slb101:Active:In Sync] log ntpq -p

 

remote refid st t when poll reach delay offset jitter

172.16.2.237 .INIT. 16 u - 64 0 0.000 0.000 0.000 172.16.3.238 .INIT. 16 u - 64 0 0.000 0.000 0.000 [root@slb101:Active:In Sync] log

 

After restart we can see in the NTP status there is no prefix like */+ infront of IP indicates both Primary & secondary NTP servers are not reachable.

 

“when” field is showing “-“ which means system is not getting any response from NTP server.

 

What shall i do to fix this issue now ?

 

Thanks in advance Sathish