Controllerless Networks

We are running IAP-305s and -315s on firmware 8.6.0.3-8.6.0.3_74788, just upgraded them in the last two weeks. Yesterday we noted that the IAPs are sending out multiple NTP packets every second, anywhere from 2 or 3 to as many as 5 or 6 packets per second. The packets are destined for a number of different destination IP addresses. 

Just wondering if this is expected behavior or if we need to be investigating this. What's the normal amount of NTP traffic for a typical IAP?

Hi, 

We cannot configure FQDN for NTP so you must have specified a particular IP address for NTP. Is it the case?

I checked on one of the cluster VCs and found that we have the NTP server set to 0.pool.ntp.org.

Hi, 

My bad, its CPPM where you cant configure the fqdn i guess. 

Is the time synced? 

It appears to be. I ran the 'show ntp status' and 'show clock' commands on one small cluster consisting of a VC and one slave unit - I looked at each of them and saw the ntp status as 'master synced'. The 'show clock' command showed correct time.

generally speaking NTP poll times should not be that frequent.

it should be around 50-60 sec. in fact most of the linux system use 64sec as min poll time. When I did a packet capture for IAPs (8.6.0.4) the NTP packets settle down to poll time of roughly 30sec. Peer Polling Interval(3)