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NTP not Synchronizing - Aruba 8320 10.11.1030

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  • 1.  NTP not Synchronizing - Aruba 8320 10.11.1030

    Posted Nov 18, 2023 09:16 AM

    Hello. I have a problem synchronizing time on a 8320 VSX pair. The given NTP servers are working fine on Cisco switches in the customer environment. However when I try to enable NTP on the Aruba switches, it is not working. 

    ntp server x.x.x.x

    ntp enalble

    ntp vrf mgmt

    I can ping the IP addresses of the NTP servers. But for some reason it is not working. Any idea what could be the reason NTP is not working properly ? I also came across this point in the guide, "Configure an NTP server with the command ntp server. When configuring a time backward more than five minutes on the Aruba 8320, 8325, or 9300 Switch Series, a reboot is recommended to avoid unusual switch behavior." Why would we need to reboot for a simple configuration task such as NTP and what is the unusual switch behavior this point is referring to ?

    Thanks in advance.

  • 2.  RE: NTP not Synchronizing - Aruba 8320 10.11.1030

    Posted Nov 18, 2023 05:12 PM

    What VRF are u using for NTP and form which VSF you ping the NTP server?

    If using VRF MGTM you use the OOBM management interface. Is the VRF MGTM configured with a IP and did you ping from this VRF?

    Also configure the timezone and consider using ibrust, below a example.

    (config)# clock timezone europe/amsterdam
    (config)# ntp server iburst vrf mgmt
    (config)# ntp enable
    (config)# write mem
    (config)# show ntp status


    Marcel Koedijk | MVP Expert 2023 | ACEP | ACMP | ACCP | ACDP | Ekahau ECSE | Not an HPE Employee | Opinions are my own

  • 3.  RE: NTP not Synchronizing - Aruba 8320 10.11.1030

    Posted Nov 21, 2023 04:42 AM

    Hello. Yes I am using mgmt interface and I can ping all the IP addresses from vrf mgmt. There is no problem with reachability. Below are the commands I used:

    clock timezone asia/qatar

    ntp server x.x.x.x

    ntp vrf mgmt

    ntp enable

    it was not synchronizing. I tried multiple IP addresses with the same behavior.