DHCP update when DNS unavailable.

  • Thread starter Thread starter Wake-up-Jeff
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Wake-up-Jeff

When I use DHCP to update DNS on behalf of the clients, what happens if the
DNS server is unavailable at the time of the update request?
Does the DHCP server periodically retry to make the entry?
If so, how often?
Does the retry only occur when the client releases the address?

Appreciate any help or reference to existing documentation.
 
In
Wake-up-Jeff said:
When I use DHCP to update DNS on behalf of the clients, what happens
if the DNS server is unavailable at the time of the update request?
Does the DHCP server periodically retry to make the entry?
If so, how often?
Does the retry only occur when the client releases the address?

Appreciate any help or reference to existing documentation.
Click to expand...


I don't have any doco's on it, but from seeing this in the past, it won't
attempt to re-update it if DNS is not available and wound up doing a renew
to get it updated. It's kind of like running an ipconfig /registerdns, if
the DNS is up, it will take it, if not, it's a one shot deal.

If someone else has anything to offer, be glad to hear it.

--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS-IS" with no warranties and confers no
rights.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
If the primary server does not respond but the zone is
replicated through multimaster replication, the client
attempts to register the name with the other primary DNS
servers that are authoritative for the name.

If the update fails because the server is not available,
the client logs a message in the event log, which you can
view by using Event Viewer. But the process is basically
done by then.

However, by default, the dynamic update client
dynamically registers its A resource records and possibly
all of its PTR resource records every 24 hours ...
 
Thanx for the reply.

I have seen documentation which states this for the client,
but does this still hold when the client is actually the DHCP server?
(Assuming the DHCP client is configured to NOT register itself with DNS).
 
In
the confused said:
If the primary server does not respond but the zone is
replicated through multimaster replication, the client
attempts to register the name with the other primary DNS
servers that are authoritative for the name.

If the update fails because the server is not available,
the client logs a message in the event log, which you can
view by using Event Viewer. But the process is basically
done by then.

However, by default, the dynamic update client
dynamically registers its A resource records and possibly
all of its PTR resource records every 24 hours ...
Click to expand...

Do you have a link on this doc?
Thanks


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS-IS" with no warranties and confers no
rights.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
found this very ofensive..I'm not qualified as an author
of a doc, because of my name? ;-)

see similar staff in the w2k deployment resuorces kit,
chapter 6..hm still gathering.
 
I believe it still will be the case..

if you specify the dhcp server to do both, regardless
whether you reconfigure the client, the server will do it
after the talk between them..

however, this may not be a good idea in most situations,
as the dhcp server will take the ownership of the a
records; if you put the server in the proxy group, then
there will be no security; there is another thing you may
want to try, to assign a different user account for the
dhcp server doing this, so as long as the account is
around, the a records will be updatable, even the server
is not reachable, or gone.
 
In
the confused said:
found this very ofensive..I'm not qualified as an author
of a doc, because of my name? ;-)

see similar staff in the w2k deployment resuorces kit,
chapter 6..hm still gathering.
Click to expand...

Wasn't mean to offend anyone. I was just curious as to a specific link to
the doc so I can read it and add it to my 4000+ links. Remember, we all
collaborate here as a team... and do ask each other questions to verfiy
stuff.

--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS-IS" with no warranties and confers no
rights.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
Ace, you are too serious...I'm just trying to have some
fun here on this not-too-much-fun techie newsgroup.
Cheers!
 
In
the confused said:
Ace, you are too serious...I'm just trying to have some
fun here on this not-too-much-fun techie newsgroup.
Cheers!
Click to expand...

Well, you know how first impressions are, it was just the other day you were
calling Ace "green", that sounds like a personal insult to me.
 
Kevin, I said I thought he was "on the greener side",
which I meant making more money,when we were talking
about BIND and Windows...I thought that should not be
misunderstood.

I don't know how you got the impression that I called
him "green"??? I'm more confused.
 
In
the confused said:
Kevin, I said I thought he was "on the greener side",
which I meant making more money,when we were talking
about BIND and Windows...I thought that should not be
misunderstood.

I don't know how you got the impression that I called
him "green"??? I'm more confused.
Click to expand...


Greener side to you meant more $$? Now I had no idea. I thought you were
implying I was a greenhorn with DNS.

Here's a little humor.... maybe you should change you name... :-)

--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS-IS" with no warranties and confers no
rights.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
If I did make you feel that way, Ace, I apologize for
used that exression here (I'm from the old land. may be I
should thank Kevin, he just said it! Otherwise I would
not know).

It seems the good old days are long gone. Once upon a
time, the IT guys were always reminded to pay attention
to which side of the grass is greener, now people get
forgotten the whole thing all together.

However, I think I should keep this name, so if I say
something wrong, I still will have an exuse! ;-)

I said it before and want say it again, Ace, you are a
nice guy.
 
In
the confused said:
If I did make you feel that way, Ace, I apologize for
used that exression here (I'm from the old land. may be I
should thank Kevin, he just said it! Otherwise I would
not know).

It seems the good old days are long gone. Once upon a
time, the IT guys were always reminded to pay attention
to which side of the grass is greener, now people get
forgotten the whole thing all together.

However, I think I should keep this name, so if I say
something wrong, I still will have an exuse! ;-)

I said it before and want say it again, Ace, you are a
nice guy.
Click to expand...

I've used the term greener on the other side, but not in context to $$, but
rather prosperity. Don;t know how old you are, but old school, new school,
I've been to both, but didn't pick up on your comment. THanks for the nice
guy plug, I just try to chug along and hopefully make a diff that no one
years ago did with me. I realize you're trying to kick up a little humor,
and that's good and all, sometimes I blurt some stuff out (but not going as
far as saying I have torettes or anything), but it can be helpful. One girl
I know, an MVP I nominated, which I consider her an expert in AD, DNS,
etc.has a great sense of humor. She used to sign her name:
"I am Dyslexia of Borg,
Your a** will be lamintated"

Her name is Laura Robinson, you may see her in the groups from time to time.
Look for her...she'll brighten the day just by reading some of her posts and
comments.

--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS-IS" with no warranties and confers no
rights.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
ok, good, look for laura!

actually you are nice, but I think I'm nicer! ;-)

I said the green thing, but did not mean what you think
it is; you guys said I invented my own DNS terms (Primary
and Secondary on clients), and meant it - although turned
out you guys were wrong, the root cause of that probably
was too eager to make me looked "green";-)). so we are at
least "even" now!

well, from now on,I'll remind me again and agin, look for
laura...thanks for the tip, Ace!
 
In
the confused said:
ok, good, look for laura!

actually you are nice, but I think I'm nicer! ;-)

I said the green thing, but did not mean what you think
it is; you guys said I invented my own DNS terms (Primary
and Secondary on clients), and meant it - although turned
out you guys were wrong, the root cause of that probably
was too eager to make me looked "green";-)). so we are at
least "even" now!

well, from now on,I'll remind me again and agin, look for
laura...thanks for the tip, Ace!
Click to expand...

Ok Mr. Green... we're wrong... you got it, you're the nicer guy!
:-)

--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS-IS" with no warranties and confers no
rights.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
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