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SOA Serial Number out of sync - OK to change?

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Vieux 16/03/2007, 22h06   #1
doug.masters@gmail.com
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Par défaut SOA Serial Number out of sync - OK to change?

Forgive me, I'm a novice when it comes to DNS. 2000 domain with an
empty root design.


If I look at the SOA Serial number on the DNS servers in the root
domain, call it domain.com, they are both at 27511. In the child
domain, we have created secondary zones for the the root domain in DNS
and the SOA serial number there is 30211. So, I assume this is the
reason the zone in the child doesn't have info recently added to the
root...

I also assume that I need to get the serial number on the root higher
than the child again? I see there is an "increment" button, do I use
it or manually change the number? Any links to articles are
appreciated, Googling "dns increment soa serial number" didn't get me
the kind of info I was hoping for...


Thanks!

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Vieux 16/03/2007, 22h11   #2
Herb Martin
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Par défaut Re: SOA Serial Number out of sync - OK to change?


<doug.masters@gmail.com> wrote in message
news:1174079188.512990.242270@e1g2000hsg.googlegro ups.com...
> Forgive me, I'm a novice when it comes to DNS. 2000 domain with an
> empty root design.
>
>
> If I look at the SOA Serial number on the DNS servers in the root
> domain, call it domain.com, they are both at 27511. In the child
> domain, we have created secondary zones for the the root domain in DNS
> and the SOA serial number there is 30211. So, I assume this is the
> reason the zone in the child doesn't have info recently added to the
> root...


Secondaries will not copy the zone ( zone transfer) unless the current
serial number is lower than the one on the Master DNS they use for
the transfer.

All AD Integrated DNS server will end up with the same serial number
so just bump it up higher (than 30211).

> I also assume that I need to get the serial number on the root higher
> than the child again? I see there is an "increment" button, do I use
> it or manually change the number?


Change the number - and it isn't really about "root" and "child" but rather
about Master and Slave (usually Primary and Secondary but possibly
Secondary as master and another Secondary as Slave.)

> Any links to articles are
> appreciated, Googling "dns increment soa serial number" didn't get me
> the kind of info I was hoping for...


Just up the number to more than 30211.


--
Herb Martin, MCSE, MVP
http://www.LearnQuick.Com
(phone on web site)


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Vieux 16/03/2007, 22h25   #3
doug.masters@gmail.com
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Par défaut Re: SOA Serial Number out of sync - OK to change?

> > I also assume that I need to get the serial number on the root higher
> > than the child again? I see there is an "increment" button, do I use
> > it or manually change the number?

>
> Change the number - and it isn't really about "root" and "child" but rather
> about Master and Slave (usually Primary and Secondary but possibly
> Secondary as master and another Secondary as Slave.)
> --
> Herb Martin, MCSE, MVPhttp://www.LearnQuick.Com
> (phone on web site)


Thanks Herb.. do I use the increment button or just manually change
the number to something higher?

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Vieux 16/03/2007, 22h51   #4
Herb Martin
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Par défaut Re: SOA Serial Number out of sync - OK to change?


<doug.masters@gmail.com> wrote in message
news:1174080319.101777.142790@n76g2000hsh.googlegr oups.com...
>> > I also assume that I need to get the serial number on the root higher
>> > than the child again? I see there is an "increment" button, do I use
>> > it or manually change the number?

>>
>> Change the number - and it isn't really about "root" and "child" but
>> rather
>> about Master and Slave (usually Primary and Secondary but possibly
>> Secondary as master and another Secondary as Slave.)
>> --
>> Herb Martin, MCSE, MVPhttp://www.LearnQuick.Com
>> (phone on web site)

>
> Thanks Herb.. do I use the increment button or just manually change
> the number to something higher?


Just manually change it as I said -- incrementing 2700 counts would be
really silly.

The increment is only there for the traditional serial number usage where
on each manual change the number is incremented once.

That isn't even common practice anymore -- most people using a date-like
format.

--
Herb Martin, MCSE, MVP
http://www.LearnQuick.Com
(phone on web site)


  Réponse avec citation
Vieux 17/03/2007, 02h45   #5
Kevin D. Goodknecht Sr. [MVP]
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Par défaut Re: SOA Serial Number out of sync - OK to change?

Read inline please.
In news:1174079188.512990.242270@e1g2000hsg.googlegro ups.com,
doug.masters@gmail.com <doug.masters@gmail.com> typed:
> Forgive me, I'm a novice when it comes to DNS. 2000 domain with an
> empty root design.
>
>
> If I look at the SOA Serial number on the DNS servers in the root
> domain, call it domain.com, they are both at 27511. In the child
> domain, we have created secondary zones for the the root domain in DNS
> and the SOA serial number there is 30211. So, I assume this is the
> reason the zone in the child doesn't have info recently added to the
> root...
>
> I also assume that I need to get the serial number on the root higher
> than the child again? I see there is an "increment" button, do I use
> it or manually change the number? Any links to articles are
> appreciated, Googling "dns increment soa serial number" didn't get me
> the kind of info I was hoping for...


You can manually change the number. That said, it would be advisable to go
ahead and set it using the RFC YYYYMMDDnn, it should automatically increment
from there.
The reason I do this and recommend it, is because the Serial will always get
increased from now until forever, (or at least as long as we are using the
Gregorian calendar). Today the serial would be 2007031600, tomorrow would be
2007031700. It doesn't mean the serial will automatically get incremented
100 every day unless you reset it every day your self. But if you do have to
make changes every day you will most likely have to increase it when you do,
unless you have an extremely large organization, it won't increment more
than 100 times a day on its own.



--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This s
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Vieux 17/03/2007, 02h58   #6
Herb Martin
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Par défaut Re: SOA Serial Number out of sync - OK to change?


"Kevin D. Goodknecht Sr. [MVP]" <admin@nospam.WFTX.US> wrote in message
news:uiT6DYDaHHA.2320@TK2MSFTNGP03.phx.gbl...
> Read inline please.
> In news:1174079188.512990.242270@e1g2000hsg.googlegro ups.com,
> doug.masters@gmail.com <doug.masters@gmail.com> typed:
>> Forgive me, I'm a novice when it comes to DNS. 2000 domain with an
>> empty root design.
>>
>>
>> If I look at the SOA Serial number on the DNS servers in the root
>> domain, call it domain.com, they are both at 27511. In the child
>> domain, we have created secondary zones for the the root domain in DNS
>> and the SOA serial number there is 30211. So, I assume this is the
>> reason the zone in the child doesn't have info recently added to the
>> root...
>>
>> I also assume that I need to get the serial number on the root higher
>> than the child again? I see there is an "increment" button, do I use
>> it or manually change the number? Any links to articles are
>> appreciated, Googling "dns increment soa serial number" didn't get me
>> the kind of info I was hoping for...

>
> You can manually change the number. That said, it would be advisable to go
> ahead and set it using the RFC YYYYMMDDnn, it should automatically
> increment
> from there.


I would agree except that the autoincrement won't maintain the
date format so it will almost immediatly become irrelevant.

> The reason I do this and recommend it, is because the Serial will always
> get
> increased from now until forever, (or at least as long as we are using the
> Gregorian calendar). Today the serial would be 2007031600, tomorrow would
> be
> 2007031700. It doesn't mean the serial will automatically get incremented
> 100 every day unless you reset it every day your self. But if you do have
> to
> make changes every day you will most likely have to increase it when you
> do,
> unless you have an extremely large organization, it won't increment more
> than 100 times a day on its own.


You mean large like in 100 machines getting a DHCP assigned address
different
from the last one it had?



  Réponse avec citation
Vieux 18/03/2007, 07h24   #7
Kevin D. Goodknecht Sr. [MVP]
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Par défaut Re: SOA Serial Number out of sync - OK to change?

Read inline please.
In news:u2zRCfDaHHA.1388@TK2MSFTNGP05.phx.gbl,
Herb Martin <news@learnquick.com> typed:

> I would agree except that the autoincrement won't maintain the
> date format so it will almost immediatly become irrelevant.


No it won't keep the date format and I didn't say it would. I was voicing my
opinion stating if the date format was used, and you want to make sure the
zone gets transferred to any secondaries that if you do use the date format
it is almost guaranteed to increase the serial on all DNS servers. For one
thing, it may not tell you the exact date the serial was last set, but its a
good chance it will be close.
The Point I'm make is not so it's relevant to the day, it's so if you
manually add records and you want it to make sure they propagate to the
secondaries, use the date format, it will go up 100 and day or 10,000 a
month, or 1,000,000 a year.





--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This s
Send IM: http://www.icq.com/people/webmsg.php?to=296095728
===================================
When responding to posts, please "Reply to Group"
via your newsreader so that others may learn and
benefit from your issue, to respond directly to
me remove the nospam. from my email address.
===================================
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http://support.wftx.us/
http://message.wftx.us/
===================================
Use Outlook Express?... Get OE_Quotefix:
It will strip signature out and more
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===================================
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===================================


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Vieux 18/03/2007, 18h17   #8
DevilsPGD
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Par défaut Re: SOA Serial Number out of sync - OK to change?

In message <#GkATYSaHHA.4940@TK2MSFTNGP05.phx.gbl> "Kevin D. Goodknecht
Sr. [MVP]" <admin@nospam.WFTX.US> wrote:

>Read inline please.
> In news:u2zRCfDaHHA.1388@TK2MSFTNGP05.phx.gbl,
>Herb Martin <news@learnquick.com> typed:
>
>> I would agree except that the autoincrement won't maintain the
>> date format so it will almost immediatly become irrelevant.

>
>No it won't keep the date format and I didn't say it would. I was voicing my
>opinion stating if the date format was used, and you want to make sure the
>zone gets transferred to any secondaries that if you do use the date format
>it is almost guaranteed to increase the serial on all DNS servers. For one
>thing, it may not tell you the exact date the serial was last set, but its a
>good chance it will be close.
>The Point I'm make is not so it's relevant to the day, it's so if you
>manually add records and you want it to make sure they propagate to the
>secondaries, use the date format, it will go up 100 and day or 10,000 a
>month, or 1,000,000 a year.


Personally, I'd advice *not* using a date-like format, simply for the
confusion it will cause down the road when someone assumes that your
date-like format matches the actual date the zone was last changed.

Each to their own, there isn't any technological advantage either way,
just a admin convenience/preference thing.
--
Insert something clever here.
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