Forum Discussion
6 Replies
Sort By
- dennypayneEmployeeThe udp monitor is a bit counterintuitive in that it considers a service UP if it receives no response from the node. If there is any sort of response it assumes it to be an error and therefore marks the service down.
- JRahmAdminIf BIG-IP is synced to your NTP servers, why not just use one of the self-IP's as the server and eliminate the extra call? My XP machine sync's just fine to my self IP:
- JRahmAdminSo if you wanted to monitor, you could edit the DNS script as Denny suggested, using ntpq or ntpdc and cut out the stratum value to get a positive check for stratum=X, or a negative check for stratum!=16.
- Girish_HS_32793NimbostratusCan the default ICMP do the trick. but in the first place why do you need to load balance a NTP server?
- Danny_Trinh_104NimbostratusThe main reason to load balance NTP server (in my case) is to let apps teams, network teams, etc. know 1 IP address for their setup. They don't need to change their setup, even the NTP server(s) downed or replaced with the new IP addresses. You can start with http://devcentral.f5.com/Wiki/default.aspx/AdvDesignConfig/DNSMonitorUsingNSLookup.html and replace "nslookup..." line with "ntpdate -q $node_ip | grep adjust > /dev/null 2>&1"
- bruce__12158Nimbostratus
Posted By Danny Trinh on 06/08/2009 2:47 PM
"ntpdate -q $node_ip" status=$?