Link state rouring issues

Exchange 2000

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Link state rouring issues

Postby TG9ubmll » Sat, 12 May 2007 03:32:01 GMT

We have 7 sites; each site has one exchange server and therefore is the 
bridgehead for that site. We have one Internet connector at head office with 
one domain name. All sites have a connector between itself and head office. 
Head office is running as a VERITAS HA 4.3 cluster server. 

We are trying to add a new connector (new site) but we cannot update our 
link state tables. We have read the following article, 
second method (rebooting the organization) but no go. We bring each server up 
one at a time starting at head office. The link state table does appear to 
update but will reset back to the previous config leaving us without the new 
connection again. 

We have open calls with Symantec (VERITAS) and MS but are not getting 
anywhere. We are not sure what else to try. Any help would be greatly 

Thanks you.

Re: Link state rouring issues

Postby Jamestechman » Sat, 12 May 2007 04:41:11 GMT

Can you turn up smtp logging and see if you see any linkstate X-
LINK2STATE  information being propagated? Also run run through this
article as well.

Link state issues and routing issues in Exchange 2000 Server and in
Exchange Server 2003

James Chong (MVP)
MCSE | M+, S+, MCTS, Security+

Re: Link state rouring issues

Postby Andy David {MVP} » Sat, 12 May 2007 04:55:10 GMT

On Thu, 10 May 2007 11:32:01 -0700, Lonnie

So you create a new RSG and then it disapears? Never heard of that. Is
that what happens?

If PSS cant help you, not sure if anyone here can. 

Re: Link state rouring issues

Postby TG9ubmll » Sat, 12 May 2007 05:26:02 GMT

Yes we already have the MSExchangeTransport logging set to max. Most events 
are informational with the exception of a bunch 4000, 4006 and 7002  & 7004 
events. Not to out of the ordinary. 

I have been through that link you sent. The only bullet that is correct is 
that the "Link state information is incorrect". Winroute shows everything is 
up, connected and working. No "not found in DS" messages or anything. However 
our connector at head office is missing for the new site.

Re: Link state rouring issues

Postby Andy David {MVP} » Sat, 12 May 2007 06:50:19 GMT

On Thu, 10 May 2007 15:55:10 -0400, Andy David {MVP}

Oops. I mean RGC.

Re: Link state rouring issues

Postby TG9ubmll » Sat, 12 May 2007 11:32:01 GMT

Sort of, it doesn't disappear from System Manager it is always listed there. 
It disappears from the Link state routing table (winroute). The way I 
understand what is happening is that the VCS cluster is preventing the Link 
state routing table to update properly. The work around that we used in the 
past was to shut down every exch server in the org and then bring them back 
one by one. We have tried this 3 times already and the old table always 
propagates back.

Re: Link state rouring issues

Postby Jamestechman » Sat, 12 May 2007 23:05:08 GMT

You can give this a shot, try supressing link state updates. But first
reboot and make sure everything is good and recognizes your new site.
Than try supressing link state updates. Who knows could be bad
connection (oscillating) link. Run it by PSS if you already have a

How to Suppress Link State Information on a Server

James Chong (MVP)
MCSE | M+, S+, MCTS, Security+

Re: Link state rouring issues

Postby TG9ubmll » Wed, 16 May 2007 03:49:04 GMT

pdate: We were finally able to update our routing table. There were two
-VCS server prevents updates to its routing table
-a server in another site was kibbled

Once we narrowed down the issue to one site it became apparent that
something was preventing updates to its routing table. After many online
efforts (including the ReloadOsInterval) failed we resorted to a reboot which
cleared the issue. Long story short this was difficult to trace because we
had to bring down so many servers in the organization. Hopefully we won't be
adding anymore sites for awhile. Thanks to all for your quick responses and


"Jamestechman" wrote:

Similar Threads:

1.Link State Routing Issue

Hi all..
I am working with PSS on this issue but I thought I will post the issue 
here for a possible resolution.
The Winroute output from many of our Exchange 2000 server shows 
object_not_found_in_ds error for address space and connector space. As a 
result of this corrupted Link State info, e-mail flow to two of our 
remote sites is hindered.
We are in a mixed environment with 5.5 and e2k servers in ALL of our 
routing/admin groups.

What is interesting is that there are couple of remote sites that show a 
clean winroute output and e-mail flow from those sites is fine to the 
two remote sites. IF link state works as engineered, I would expect for 
all the e2k servers to hold an unclean table since link information is 
propagated by 691 port intra-site and via SMTP inter-site.

I am running Win2k SP4 and E2k SP3/ With 813840 Roll-up.
Any thoughts..
Please e-mail me directly to  XXXX@XXXXX.COM . Thanks guys

2.EXBPA tool + link state suppression is not enabled

We have a windows 2000 exchange server at the moment. We are planning on 
introducing a 2007 exchange server and after a few weeks of running together 
we plan to decomission the 2000 exchange server. I am using the EXBPA tool 
for prepartion. I am getting the following warning "Warning link state 
suppression is not enabled". After a bit of research i found the information 
listed below:

1. Open Registry Editor.
2. Locate 
3. Right-click Parameters and select New | DWORD value. Name the new DWORD 
value SuppressStateChanges.
4. Double-click SuppressStateChanges.
5. In the Value data field, enter 1.
6. Close Registry Editor and then restart the Simple Mail Transfer Protocol 
(SMTP) service, the Microsoft Exchange Routing Engine service, and the 
Microsoft Exchange MTA Stacks services for

I searched the registry on my windows 2000 dc and the 'RESvc' key does not 
exist. My question, can i install exchange 2007 into my network dispite the 
warning error?



3.connectors not available and link state


I have a question about routing.

I have a Back-End server and two Front-End servers (servers A and B) for 
smtp relay. In the Back-End I have two routing group connectors, one for 
every Front-End server.

The cost of Connector to A is 1 and Connector to B is 10. So, the preferred 
connector is always Connector to A.

If I stop smtp service in server A, then it tooks a few minutes Back-End 
server to know this and so to start using Connector to B. I see that is tooks 
usually around 5 or 6 minutes.

I need to know this time.

I guess that when the Back-End server is going to issue a new Link state 
advertisement, then it learns that its connector to A is not available. But 
I'm not sure. 

Anyone knows how the Back-End server learns that one of its connectors is 
down because of there is no link to server A?

Tnanks, regards,


4.Suppressing link state changes for 2007

I have two AD sites and am planning to suppress link state changes on all 
exchange servers this weekend.  One of the AD sites will not have Exchange 
2007 for several months and I just wanted to quickly verify if I can suppress 
link state changes in that site too without any adverse effects.

I don't think it's problem - just wanted that warm, fuzzy feeling about 
doing it.

5.Updating the link state table

Is there a button in Exchange System Manager anywhere (or a utility) to get
Exchange to review the link state table (eg is a connection to another
server up down) and recalculate best paths etc?

I'm interested particularly because I find the "deny public folder referral"
checkbox on a connector takes hours to be honoured and, without restarting
the server, I'd like to be able to 'prod' Exchange to notice the change.


6. Winroute link state goes down using smart hosts

7. Link State Not Registered

8. Changing port 691 for link state information

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