How to configure time synchronization for two NTP servers

We have IOSXR 4.2.1 on routers CRS3 and ASR9K with all recomended SMUs; we need to configure the time synchronization for two NTP servers with the configuration below, but the routers became unstable; synchronize with one NTP servers for some time, then switch to other NTP server, and keep doing this. Anyone know why this behavior?
ntp
authentication-key 1 md5 encrypted 01070F074F0A05
authenticate
trusted-key 1
server 10.192.32.32 prefer
server 10.192.32.33
source Loopback50
update-calendar
RP/0/RP0/CPU0:DFCRSDTC1#sh log | i ntp
Wed Jul 10 09:37:04.621 BRSPO
RP/0/RP0/CPU0:Jul 4 21:29:18 : ntpd[256]: %IP-IP_NTP-5-SYNC_LOSS : Synchronization lost : 10.192.32.32 : Peer unreachable or clock selection failed
RP/0/RP0/CPU0:Jul 4 21:29:18 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_LOST : High priority NTP peer connection lost - Stratum 2->15.
RP/0/RP0/CPU0:Jul 4 21:29:18 : ntpd[256]: %IP-IP_NTP-5-ALL_CONN_LOST : All NTP peer connections failed.
RP/0/RP0/CPU0:Jul 4 21:29:27 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_RECOVERED : High priority NTP peer connection recovered - Stratum 15->2.
RP/0/RP0/CPU0:Jul 4 21:30:21 : ntpd[256]: %IP-IP_NTP-5-SYNC_LOSS : Synchronization lost : 10.192.32.32 : Peer unreachable or clock selection failed
RP/0/RP0/CPU0:Jul 4 21:30:21 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_LOST : High priority NTP peer connection lost - Stratum 2->15.
RP/0/RP0/CPU0:Jul 4 21:30:21 : ntpd[256]: %IP-IP_NTP-5-ALL_CONN_LOST : All NTP peer connections failed.
RP/0/RP0/CPU0:Jul 4 21:31:36 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_RECOVERED : High priority NTP peer connection recovered - Stratum 15->2.
RP/0/RP0/CPU0:Jul 4 21:35:56 : ntpd[256]: %IP-IP_NTP-5-SYNC_LOSS : Synchronization lost : 10.192.32.33 : Peer unreachable or clock selection failed
RP/0/RP0/CPU0:Jul 4 21:35:56 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_LOST : High priority NTP peer connection lost - Stratum 2->15.
RP/0/RP0/CPU0:Jul 4 21:35:56 : ntpd[256]: %IP-IP_NTP-5-ALL_CONN_LOST : All NTP peer connections failed.
RP/0/RP0/CPU0:Jul 4 21:40:11 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_RECOVERED : High priority NTP peer connection recovered - Stratum 15->2.
RP/0/RP0/CPU0:Jul 4 21:50:52 : ntpd[256]: %IP-IP_NTP-5-SYNC_LOSS : Synchronization lost : 10.192.32.33 : System clock selection failed
RP/0/RP0/CPU0:Jul 4 21:50:52 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_LOST : High priority NTP peer connection lost - Stratum 2->6.
RP/0/RP0/CPU0:Jul 4 21:59:26 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_RECOVERED : High priority NTP peer connection recovered - Stratum 6->2.
RP/0/RP0/CPU0:Jul 4 22:25:07 : ntpd[256]: %IP-IP_NTP-5-SYNC_LOSS : Synchronization lost : 10.192.32.33 : System clock selection failed
RP/0/RP0/CPU0:Jul 4 22:25:07 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_LOST : High priority NTP peer connection lost - Stratum 2->6.
RP/0/RP0/CPU0:Jul 4 22:56:16 : ntpd[256]: %IP-IP_NTP-5-SYNC_LOSS : Synchronization lost : 10.192.32.33 : Peer unreachable or clock selection failed
RP/0/RP0/CPU0:Jul 4 22:56:16 : ntpd[256]: %IP-IP_NTP-5-ALL_CONN_LOST : All NTP peer connections failed.

Hi Claudio, that ddts is pretty generic to be honest but yes it is filed to address sync issues in the XR NTP algo.
The thing is that XR ntp clock selection is a bit different then iOS and follows the specs very closely which results in this erroneous loss behavior.
For instance, you could also see this issue with a sync loss if the update time is only 500msec off what it was before and that will result in a ntp sync loss rather then adjusting to it.
Also I wanted to mention that the ntp prefer is a bit of a misnomer in XR (since it follows the specs differently then IOS) and this knob was taken over from IOS really.
You might get some joy if you set it to one server only and see if that helps?
regards
xander

Similar Messages

How to configure Time Capsule for Automatic Backup AND HARD DRIVE USE

I tried to configure Time Capsule for back up and as a hard drive. I record music and need to copy the music myself onto an external hard drive for speed, so I want the TC to double as an external hard drive, and do the back up. I want to be able to open the TC as a hard drive, to open my songs from it. Can it do both?

I finally figured it out. I am able to access my TC from the "shared folder." When I click on it, I get the "connection failed message." I failed to notice the login button in the upper right -- user error due to my Windows based education. The button is very subtle. Once I login, I can create folders and add content.
I didn't see a partition option. Where is that? Just curious.
Thanks!

How to configure Time Capsule for setup of an IP camera?

First, a summary of my gear: Internet service provider = Verizon FIOS. FIOS uses an ActionTec Router (Model MI424WR). The ActionTec does the routing, assignment of private IP addresses and NAT. The ActionTec has wireless capability but I have DISABLED the wireless piece of ActionTec. I use Time Capsule (4rth generation, 802.11n, Version 7.6) for my wireless LAN. The Time Capsule is hardwired to the ActionTec via Ethernet.
My objective is to setup a Foscam IP camera (Model FI8918), connected wirelessly with Time Capsule, so that I can control the Foscam from both inside and outside of my wireless LAN from my iPhone running a Foscam app. If anyone has managed to get an IP camera up and running in the scenario described above, I would appreciate any tips and info, especially when it comes to port forwarding and connection sharing. For example, do I need to setup port forwarding on both the ActionTec and Time Capsule? What type of connection sharing? Right now, the Time Capsule is in bridge mode.

I have yet to setup my cameras, but I can tell you that since the Time Capsule is configured in Bridge Mode....and that is the correct setting for it when it is connected to the Actiontec Gateway/Router.....that any port forwarding or other configuration must take place within the Actiontec router.
In Bridge Mode, the Time Capsule is acting as a simple pass through device even though it is functioning as a wireless access point.
Everything on the network gets an IP address from the Actiontec device, so that is where you will need to concentrate with the configuration of the cameras.
It's unlikely that an Actiontec expert is here on an Apple support forum, but you never know. Might be a good idea to also post in an Actiontec support forum.

How to use one certificate for two directory servers?

Hi,
running Sun DSEE 6.3.1 on two servers, server 1 has name ds1.example.com, server 2 has name ds2.example.com. There is a round robin DNS record ds.example.com, which alternates between:
ds1.example.com
ds2.example.com
and
ds2.example.com
ds1.example.com
An LDAP client connects to one of the servers over SSL using the name ds.example.com. We want to generate a certificate using the name ds.example.com and use it on both directory servers.
If we generate a CSR using DSCC on server 1 and get back a signed certificate, the certificate can be installed correctly on server 1. However, if we use the same signed certificate on server 2 it fails with error:
Unable to find private key for this certificate.
Failed to add the certificate.
Error executing the operation. The error code is 11.
What is the correct way to generate one CSR, have it signed by a CA and then implement this signed certificate on multiple servers?
/rolf

From one Directory Server (ds1) generate CSR with the name ds.example.com in the request. Once you get the signed cert import it into the same server you generated CSR with. Then from ds1.example.com :
scp -p <slapd install/instance path>/alias/* <account>@ds2.example.com:<slapd install/instance path>/alias/
to copy the contents of the alias path to the same location on the other Directory Server. Make sure file permissions are the same.

How to configure release procedure for rate contracts release

Dear all,
How to configure release procedure for rate contract following are the requirements
they are two release codes c1 & c2 <=100000,>=100000
                if c1 is not there c2 has to be approved
     Change in the value of the rate contract contract
     Change in the validity of the rate contract
     Addition of deletion of line items
While using a non u2013 released rate contract in the PO an error message should shoot out.
Also the logic should be changed while using the rate contract in the PO.
The usage of the rate contract should be till the validity of the rate contract. i.e. the measurement should be end date of the rate contract and the PO creation date and not the delivery date of the PO. &
It should be possible to refer existing valid rate contracts in purchase orders.
Regards,
bhaskar

Hi,
In SAP rate contract is known as value contract denoted with wk. The release procedure for rate contract is same as that of other contracts and scheduling agreements. The tables for contracts will vary with SA (Scheduling agreement) .You may try and maintain condition records based on the customer combination and maintian the validity date of condition records as per your requirement.For contract and PO will have the same header/item table as EKKO/EKPO, and the release
class in standard is the same FRG_EKKO, you can use the same for contract.
To distinguish if it's a contract or PO, EKKO-BSART can be used.
For contract EKKO-BSART will be MK or WK, while PO will have NB/UB etc..
You can restrict the document type to set up the release strategy for only contract.
Of cause, you can also create your own release class Z* for contract copying standard
one FRG_EKKO via CL01/Class type 032, and then assign the class Z* to customizing:
OLME:
-> contract
->Release Procedure for Contracts
->Define Release Procedure for Contracts
->Release Groups
If you have already created the PO release class.
Assign a new chracteristic of Document Category -BSTYP
Please check below link for detailed release procedure. I hope this wil help you out .Thanking you.
http://wiki.sdn.sap.com/wiki/display/ERPSCM/RELEASE+PROCEDURE#RELEASEPROCEDURE-TABLESUSEDFORRELEASEPROCEDURES

How to use time capsule for wireless back-up but not internet?

Hello,
I have a tower and recently a laptop at work. The tower is connected to our local network with an ethernet cable and the laptop with wireless. So, the internet connection is fine for both.
I was hoping to use my time capsule to do time machine backups on my laptop. Do you have any advice on how to configure this? I do not want to use the time capsule to extend my Internet, as I believe my work I.T. would prefer to handle all access to their network.
Perhaps there is some documentation about doing this that you could point me to? I have not been able to find it.
Thank you for your help.

Your original question was How to use Time Capsule for wireless back-up but not Internet?
There is no reason for you to connect the tower....or anything else...using Ethernet if your goal remains that same as you stated.
If you are asking if you can backup the Tower using Ethernet, and not wireless, then you can connect the tower to one of the LAN <-> ports on the Time Capsule....not the WAN port.
Yes, it appears to work without plugging into my tower.
Correct, it will work.
I just have to select the network that it created. Of course, I have no access to the Internet while this is happening and it can not auto backup, unless I am on that wireless signal.
As I stated, that is the downside to trying to back up without an Internet connection. You have to establish another network...and backup over that network.
If you are asking if you can stay connected to the work network while also backing up to your non-Internet "private" network, that is not possible.

Time synchronization for SharePoint virtual machine

Hi everyone,
As a best pratice, i read in a technet article : "Disable time synchronization for each SharePoint virtual machine".
Do i need to disable the Integration Service "Time Syncronization" in the virtual machine settings ?
Is it better to do a NTP sync on each serveur ? (Virtual and physical machine)
Thanks in advance for your reply,
Sincerly,
Anthony Picot

Hi Anthony,
yes, you should disable the Integration Services Time Sync per VM Settings, as this can lead to problems with the SharePoint timer service and yes, you can do an NTP Sync instead.
http://technet.microsoft.com/en-us/library/ff621085(v=office.14).aspx
Andrei

How to optimize Time Capsule for Xbox 360

I just recently bought a new Apple 2TB Time Capsule to replace my router and I've noticed since then, my Xbox 360 has been having problems. My friends will invite me to a party or game and sometimes it says session no longer available and the same thing happens to them when I invite them. Are there some settings I need to enable?disable for my Xbox to function properly on the network? And would I be able to configure these settings for two systems? I sometimes have one of my buddies come over and we'll just camp all night in my basement playing Xbox and he has the same issues as well. And my internet connection is just fine because the Xbox and Capsule are in the same room and we just recently upgraded my internet to a 50mpbs connection from Time Warner Cable since it had good reviews in my area and we couldn't get FiOS in my specific area.

Is the modem you have a pure cable modem or has TWC supplied you a combined modem router??
If you are using the TC as your main router, then xbox has issues because it requires a router that conforms to Vista standard upnp. The TC does not.
Apple don't even use upnp in their routers. So you need to open all the ports manually for the xbox to use. Just look it up.. xbox issues with airport routers will give you hundreds of hits here.
AirPort Extreme and xbox 360
Unfortunately using 2x xboxes on one internet connection makes upnp essential.. it will not work without. That means you need a router that is specifically xbox compliant. You can use the TC in bridge to that router.
That is why it is often easier to use the ISP supplied modem router now, or buy your own if that is allowed. Most of those will be xbox rated, since upnp is universal standard except in Apple world.

How to use Batch operation for two xsodata services?

Hi All,
I have two xsodata services. How to use submit batch for two xsodata services
Thanks,
Mj

Gateway Batch Calls from SAPUI5

How to configure Broadcast messaging for IC Webclient profile

Dear all,
How to configure Broadcast messaging for IC Webclient profile. what are the prerequisites for it?
We are not using EP interface for IC Webclient, then where can I find broadcast messaging URL in SAP CRM system.
I have checked for the relevant BSP application, but could not find.
Please help me to configure the scenario successfully, your help will be highly appreciated.
Best regards,
Raghu ram

Hi raghu
In CRM Broad cast messaging application is CRM _BM,
Go to easy access u2013 go to favourites u2013 select add other objects - select BSP Applications- then select CRM_BM Application.
Select that BSP application and test it u2026
`
Regards,
Narsimha

How to create a calendar for two years in GL

how to create a calendar for two years in GL

Hi,
- Login into Oracle EBS and select a responsiblity with GL Superuser drants (e.g. General Ledger Super User)
- Navigate to Setup + Financials + Calendars and open the GUI Accounting (Navigation for R12)
- Query the used calendard (used from jour Set of Books/ Ledger via the GUI
- Enter for each Period (= Period Type 13, 16, 18,...) one Record, have a look to the existing data, used the same logic.
In the GUI, defined the calendar for 2 Years
Dirk

How to configure Time-sheet in Project server 2013 please share the doc with screen shot

How to configure Time-sheet in Project server 2013 please share the doc with screen shot
Thanks and Regards, Rangnath Mali

Hi,
Please refer to the following Youtube video and article.
https://www.youtube.com/watch?v=lZWvg4q17JE
https://support.office.com/en-sg/article/Set-up-timesheets-and-task-status-672fa06f-8c4b-4e43-bfbc-4c355d681605
Please don't forget to mark it answered, if your problem resolved or helpful.

Vertically sync time position for two or more 2D axis systems?

In DIAdem: VIEW,
Is it possible to vertically sync the time position for two or more 2D axis system charts placed above each other?
I have displayed several channels on one 2D chart, and one channel of particular interest on a separate chart above, which was very easy to do. It would be really useful to sync the time position on both charts, such that scrolling one chart also scrolls the second chart, or zooming one chart also zooms the second chart to the same area, which seems like a fairly basic thing to want to do, but I haven't found a way to do it yet.
Any help greatly appreciated!
Solved!
Go to Solution.

Hi Brad,
Yes, I have been using that method, which works fine up to a point.
But, say you have several curves displayed on the bottom chart, with the Y-Axis set to "n Y-axes", then the start of the x-axis will be further across to the right than the top chart which has only one curve displayed.
It is possible to add an empty area to the left of the top chart, to push the start of the x-axis across into alignment (see attached), but every time you add or remove a curve on the bottom chart, or the scale changes enough to add a digit, the start of the x-axis moves and the top chart needs aligning again.
I'm really after a method to lock both ends of both x-axes to the same vertical screen position, so everything stays aligned automatically?
Attachments:
chart - full.JPG ‏152 KB
chart - detail.JPG ‏145 KB

How to configure Email notification for User login's in Exchange Infrastructure?

How to configure Email notification for User login's in Client Machines?

Hi ,
Based on the description , you need to assign logon scripts to the end users via group policy and also use your exchange server as the smtp server in that logon script to relay emails to the internal recipients.
Thanks & Regards S.Nithyanandham

How to configure SMTP server for osb 10.3.1

Hi All,
Can anyone share information on how to configure SMTP server for osb 10.3.1
and then how to send an email from osb 10.3.1
Thanks in Advance!!

Thanks a lot!!
I configured the same way. When I am sending email to an account on the same domain as my SMTP server is the sending of email is successful. But its giving error when I am trying to send an emain to an account which is on different domain. It giving error as "Operation has been cancelled"
Please suggest something.

How to configure time synchronization for two NTP servers

Similar Messages

Maybe you are looking for