Date  Time incorrect after a power reset

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    This document was generated from CDN thread

    Created by: John Quintanilla on 09-04-2013 03:31:50 PM
    I'm running SRE-V 2.0 on the SRE-910.  I've been prepping it for a customer and noticed that after a power reset the date/time on the hypervisor is incorrect.  I have to manually reset it in vSphere client.  Is this a hardware clock issue?   Please advise. Thanks. John

    Subject: Re: New Message from John Quintanilla in Service Ready Engine Virtualizatio
    Replied by: John Quintanilla on 09-04-2013 04:09:18 PM
    I just wanted to clarify this post.  After a power reset, the hypervisor
    date/time is way off, like 2008.    Plus, I do have ntp configured in
    the hypervisor.

    On 04/09/2013 03:31 PM, Cisco Developer Community Forums wrote:
    > John Quintanilla has created a new message in the forum "SRE-V
    > Technical Questions":
    > -------------------------------------------------------------- I'm
    > running SRE-V 2.0 on the SRE-910.  I've been prepping it for a
    > customer and noticed that after a power reset the date/time on the
    > hypervisor is incorrect.  I have to manually reset it in vSphere
    > client.  Is this a hardware clock issue?   Please advise.
    > Thanks.
    > John
    > --
    > To respond to this post, please click the following link:
    > http://developer.cisco.com/web/srev/community/-/message_boards/view_message/14066853
    > or simply reply to this email.

    --
    John Quintanilla
    AvFinity LLC
    jqq@avfinity.com
    http://www.avfinity.com
    512-535-3384

    This communication, including attachments, is for the exclusive use of addressee and may contain proprietary, confidential or privileged information. If you are not the intended recipient, any use, copying, disclosure, dissemination or distribution is strictly prohibited. If you are not the intended recipient, please notify the sender immediately by return email and delete this communication and destroy all copies.

    Subject: RE: Date  Time incorrect after a power reset
    Replied by: Brett Tiller on 09-04-2013 04:25:43 PM
    Hi John,

    The time is not persisted during a reload, but the NTP server should sync so that correct time is given after a short period of time.  There is a scenario where the synch may not occur, and I've provided the issue and workaround below.  This information is in the Release Notes as well.
    Symptom: If the VMware vSphere HypervisorTM clock is manually set using the vSphere Client GUI, and then an NTP server is added to the clock settings, the Cisco SRE Service Module fails to synchronize with the NTP server.

    Condition: This problem can occur if the clock is manually set using the vSphere Client GUI, and at a later date, an NTP server is added to the time configuration using the vSphere Client GUI.

    Workaround: To resolve this problem, reload the Cisco SRE Service Module.
     
    Thanks,

    Brett

    Subject: Re: New Message from Brett Tiller in Service Ready Engine Virtualization -
    Replied by: John Quintanilla on 09-04-2013 04:50:17 PM
    Hi Brett,
    This isn't just a time drift.  If I power cycle the router the Time
    Configuration page in vSphere Client 5 shows 12/31/2007.  I have to
    reset manually in vSphere to get it corrected.  However, once it's
    correct it will keep time even during a reload from IOS.  This anomaly
    appears limited to a power reset.
    John


    On 04/09/2013 04:25 PM, Cisco Developer Community Forums wrote:
    > Brett Tiller has created a new message in the forum "SRE-V Technical
    > Questions":
    > -------------------------------------------------------------- Hi John,
    >
    > The time is not persisted during a reload, but the NTP server should
    > sync so that correct time is given after a short period of time. 
    > There is a scenario where the synch may not occur, and I've provided
    > the issue and workaround below.  This information is in the Release
    > Notes as well.
    > Symptom: If the VMware vSphere HypervisorTM clock is manually set
    > using the vSphere Client GUI, and then an NTP server is added to the
    > clock settings, the Cisco SRE Service Module fails to synchronize with
    > the NTP server.
    >
    > Condition: This problem can occur if the clock is manually set using
    > the vSphere Client GUI, and at a later date, an NTP server is added to
    > the time configuration using the vSphere Client GUI.
    >
    > Workaround: To resolve this problem, reload the Cisco SRE Service Module.
    >
    > Thanks,
    >
    > Brett
    > --
    > To respond to this post, please click the following link:
    > http://developer.cisco.com/web/srev/community/-/message_boards/view_message/14076015
    > or simply reply to this email.

    --
    John Quintanilla
    AvFinity LLC
    jqq@avfinity.com
    http://www.avfinity.com
    512-535-3384

    This communication, including attachments, is for the exclusive use of addressee and may contain proprietary, confidential or privileged information. If you are not the intended recipient, any use, copying, disclosure, dissemination or distribution is strictly prohibited. If you are not the intended recipient, please notify the sender immediately by return email and delete this communication and destroy all copies.

    Subject: RE: Date  Time incorrect after a power reset
    Replied by: Brett Tiller on 09-04-2013 05:43:36 PM
    Hi John,

    Understood.  When you do a soft reload of the router meaning that you type 'reload', the service module is not affected which is by design.  This is why the time is not lost.  However, powering down the router will obviously power the service module down as well and the time is lost.  When the system is powered back up, ESXI will need to synch with the NTP server which can take several minutes.  Until that synch occurs ESXI will sit at its default date.
     
    Thanks,
    Brett

    Subject: RE: New Message from John Quintanilla in Service Ready Engine Virtualizatio
    Replied by: Radhika Miriyala on 09-04-2013 05:42:31 PM
    John,
    This is because of the SRE module had two RTC  (Real time clock) chips. Only one had a backup battery and ESXI recognizes the RTC without back up. So when you do a Power reset the time goes back to 2008/2007 (depending on the time zone). After the power cycle since the time goes to 2008 the NTP sync takes longer than usual.

    Thanks,
    Radhika

    From: Cisco Developer Community Forums [mailto:cdicuser@developer.cisco.com]
    Sent: Tuesday, April 09, 2013 2:50 PM
    To: cdicuser@developer.cisco.com
    Subject: New Message from John Quintanilla in Service Ready Engine Virtualization - SRE-V Technical Questions: Re: New Message from Brett Tiller in Service Ready Engine Virtualization -

    John Quintanilla has created a new message in the forum "SRE-V Technical Questions": -------------------------------------------------------------- Hi Brett,
    This isn't just a time drift. If I power cycle the router the Time
    Configuration page in vSphere Client 5 shows 12/31/2007. I have to
    reset manually in vSphere to get it corrected. However, once it's
    correct it will keep time even during a reload from IOS. This anomaly
    appears limited to a power reset.
    John


    On 04/09/2013 04:25 PM, Cisco Developer Community Forums wrote:
    > Brett Tiller has created a new message in the forum "SRE-V Technical
    > Questions":
    > -------------------------------------------------------------- Hi John,
    >
    > The time is not persisted during a reload, but the NTP server should
    > sync so that correct time is given after a short period of time.
    > There is a scenario where the synch may not occur, and I've provided
    > the issue and workaround below. This information is in the Release
    > Notes as well.
    > Symptom: If the VMware vSphere HypervisorTM clock is manually set
    > using the vSphere Client GUI, and then an NTP server is added to the
    > clock settings, the Cisco SRE Service Module fails to synchronize with
    > the NTP server.
    >
    > Condition: This problem can occur if the clock is manually set using
    > the vSphere Client GUI, and at a later date, an NTP server is added to
    > the time configuration using the vSphere Client GUI.
    >
    > Workaround: To resolve this problem, reload the Cisco SRE Service Module.
    >
    > Thanks,
    >
    > Brett
    > --
    > To respond to this post, please click the following link:
    > http://developer.cisco.com/web/srev/community/-/message_boards/view_message/14076015
    > or simply reply to this email.

    --
    John Quintanilla
    AvFinity LLC
    jqq@avfinity.com<mailto:jqq@avfinity.com>
    http://www.avfinity.com
    512-535-3384

    This communication, including attachments, is for the exclusive use of addressee and may contain proprietary, confidential or privileged information. If you are not the intended recipient, any use, copying, disclosure, dissemination or distribution is strictly prohibited. If you are not the intended recipient, please notify the sender immediately by return email and delete this communication and destroy all copies.
    --
    To respond to this post, please click the following link: http://developer.cisco.com/web/srev/forums/-/message_boards/view_message/14076374 or simply reply to this email.