Rick

This is interesting.  I trying to gain more info on the significance of
costs for non-backup type links.  Say for instance a large local campus site
with multiple say, 128k frame links out to field offices.  I'm guessing
you'd set the costs for the local site for 10 for no other reason than to
have room for expansion.  Would you set the costs differently for the field
offices or does the fact that I've already setup a site connector that
defines the link enough?

Ken

-----Original Message-----
From: Rick Kingslan [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, February 05, 2002 9:07 PM
To: [EMAIL PROTECTED]
Subject: RE: [ActiveDir] ISTG and Link costs


Joe,

It's not really _IF_ ISTG is running - it is. It is a role that the KCC
assigns and requires, and unlike the Bridgehead, you cannot control who
the ISTG role holder is.

As to costing - the cost is assigned to the link. The site link is
created by you and creates the physical connection to AD that is already
assumed by the KCC. It defines the protocol (RPC or SMTP) and the
costing based on relative speed of other site links in your
infrastructure.
The KCC manages the connection objects - the replication topology will
take into account the costing you have placed on your links - whenever
possible. The lower cost will be favored over a higher cost when
creating the connection objects.

Site links - created and costed by you.
Connection objects - created by KCC, and infulenced by site link
costing.
ISTG (Intersite Topology Generator) - with the KCC, creates and
maintains the replication topology.

HTH!

Rick Kingslan - Microsoft Certified Trainer
  MCSE+I on Windows NT 4.0
  MCSE on Windows 2000
  MVP [Windows NT/2000 Server]

"Any sufficiently advanced technology
is indistinguishable from magic."
  ---  Arthur C. Clarke





-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of Joe
Sent: Tuesday, February 05, 2002 1:26 PM
To: [EMAIL PROTECTED]
Subject: [ActiveDir] ISTG and Link costs


If ISTG is running do you need to assign link costs between your sites?
Does the ISTG handle all of this on its own, or does it consider link
costs when it creates its replication model?  Thx, Joe

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