Re: issue with DC replication

Ah, Ok,
-1st, are the DCs with more than one NIC each?
- Yes, you can configure the DNS to respond only to the address in the IP that you want to. If your interface tab is setup to respond on the correct IP address you should have no issues at all.

Try the follwing. After taking the DC down, go to both nodes of the NLB, and run from cmd:
arp -d
nbtstat -R
ipconfig /flushdns

and try again, what are the results?
Problems?
- Ok, install Wireshark or NetMon to check what is going on at network level request.
- Another thing to consider is FROM WHERE are you testing the FTP? For example, if you're testing from a client, can you check if the client is being redirected to the correct address or DNS server? Is the router or the network balancing mechanism (assuming alteon or other dedicated device) with problems when redirecting traffic?

--
I hope that the information above helps you.
Have a Nice day.

Jorge Silva
MVP Directory Services
"millin" <ssuj@xxxxxxxxxxxxxxxxxxxxxxxxx(No Spam)> wrote in message news:9A9B67DE-6CF1-47D4-9703-B8379C5F71DF@xxxxxxxxxxxxxxxx
Hi Jorge,

I may be misguided you both. I don't know.
O.K our network structure is like this.

we have got 2 FTP/WEB Servers which are public having ip address in the
range 217.45.XXX.8 and 217.45.XXX.9 and both are clustered using Microsoft
NLB,whose Virtual IP address is 217.45.xxx.12.

Whenever we take one of the D.C for maintenance or goes down, FTP servers is
going down. But I ran ipconfig/all on both the WEB01/02,I can see the
preferred DNS and alternated DNS as our AD-I DNS servers.
But another thing which I noticed was for the restricted IP address (at the
interface tab) for both the DNS servers, only have one DNS server IP Address.
I am just wondering if I give both the DNS server's IP address at the
interfaces (tab) might solve my problem!!! I don't know.

does it make sense !!!

thanks
mill

"Jorge Silva" wrote:

Hi
I'm a little lost here...

- You have one FTP cluster in Active/Passive configuration? Then you also
have 2 DCs that are supporting that cluster (probably for the accounts)?

That's correct, these 2 DC's are for the External accounts.
You can see the Host A records of both DC/DNS are there in each DNS.
But I couldn't find any records of Cluster IP there!!!.

- You say that you nee to take the FTP out (evict node?) of the cluster
config, why you need to do that? Failover doesn't work?

We are having a different system at our Co. Because we are running a
slightly complicated procees consuming applications we always have to do it
manually. Once we took one of WEB Box out you have to point that as the
Active server for all external client request by changing the name and
location of server on xx.cfg file.
You know what I am talking about, don't you?

If you need further info please don't hesitate to contact me.
It's kind of urgent, if we resolve ASAP, it's good for me and for the Co.

Thanking you,

mill


"Jorge Silva" wrote:

Hi
I'm a little lost here...

- You have one FTP cluster in Active/Passive configuration? Then you also
have 2 DCs that are supporting that cluster (probably for the accounts)?

- You say that you nee to take the FTP out (evict node?) of the cluster
config, why you need to do that? Failover doesn't work?

- Then you say that the server doesn't update the DNS config? What server?
Assuming the Cluster Virtual Network Name (associated with virtual IP
Address), that record should already exist in DNS when the cluster is up and
running?

Perhaps I missunderstood you!!!
--
I hope that the information above helps you.
Have a Nice day.

Jorge Silva
MVP Directory Services
"millin" <ssuj@xxxxxxxxxxxxxxxxxxxxxxxxx(No Spam)> wrote in message
news:12694AE9-1DFC-4F91-9BEF-BD856AF9A287@xxxxxxxxxxxxxxxx
> Dear All,
>
> I am having a problem with our live FTP servers.
> We are running our FTP servers on cluster.
> Whenever one of the FTP server goes down we have to take that server > out
> from the cluster and point to that to the other FTP server(passive).
> The problem which I am facing is whenever we take one of the FTP server
> from
> the cluster.For a couple of minutes the server doesn't seem to be > updating
> on
> the DNS server,so our LIVE FTP says it's DOWN!!!.From our point of view
> that
> is not acceptable.
> we have got 2DC's running for the Domain(LIVE).I ran replmon and it
> doesn't
> showing any replication issues between the two DC's.
> So I am bit stucked at the moment?
>
> any help would be apprciated.
>
> Thanks
> mill


.

Relevant Pages

  • Re: issue with DC replication
    ... Are the addresses in the same network ID as the FTP servers? ... different AD-I DNS server ip address which will provide the DNS services. ... Well, if it fails when DC1 is down, that means that for some reason DC2 is not responding to the server requests when DC1 is down (also check if both ... >> have 2 DCs that are supporting that cluster? ...
    (microsoft.public.windows.server.active_directory)
  • Re: issue with DC replication
    ... different AD-I DNS server ip address which will provide the DNS services. ... I think that when you lose resolution between the FTP and the DNS/DC ... You have one FTP cluster in Active/Passive configuration? ...
    (microsoft.public.windows.server.active_directory)
  • Re: issue with DC replication
    ... If I ran ipconfig/all,I can see the preferred and Alternate DNS on both ... Web Server going down until you put that D.C/DNS back on again.Is anything ... If your cluster machines have only one DNS server configured ... Whenever we take one of the D.C for maintenance or goes down, FTP ...
    (microsoft.public.windows.server.active_directory)
  • Re: FTP install order W2K Cluster
    ... MVP - Windows Server - Clustering ... >I would strongly suggest that you use NLB to setup your load-balanced FTP ... > "Your choice of cluster technologies (server clusters or Network Load ... > applications that have long-running in-memory state or frequently updated ...
    (microsoft.public.windows.server.clustering)
  • Re: issue with DC replication
    ... DNS AD-I running on 217.54.46.0 subnet..Some routing mechnism is ... different AD-I DNS server ip address which will provide the DNS services. ... I think that when you lose resolution between the FTP and the DNS/DC ... You have one FTP cluster in Active/Passive configuration? ...
    (microsoft.public.windows.server.active_directory)
Loading