Advice with Site Links

Hi,

I would like advice regarding setting up site links. I have ten sites all connected by IPVPN. Some are on fibre some ADSL, but all more than capable of regular replication. All sites can see each other, and we have two data centres.

Any advice would be good. Happy to supply more info.



What kind of advice to you need if it's all working fine - as it appears to be?

In general, I would say that any file sharing goes like this:
Local file sharing is likely, these days, to be on 1Gbps links.
Remote file sharing is going to be limited to the slowest of 1) the sending upload speed available and 2) the receiving download speed available.
If the upload speed available via ADSL is 500kpbs then that will be the file transfer speed at best.

This is less than 1/1000th of the local transfer speed. People will be very unhappy.

Is that what you were looking for? or...?



What kind of advice to you need if it's all working fine - as it appears to be?

In general, I would say that any file sharing goes like this:
Local file sharing is likely, these days, to be on 1Gbps links.
Remote file sharing is going to be limited to the slowest of 1) the sending upload speed available and 2) the receiving download speed available.
If the upload speed available via ADSL is 500kpbs then that will be the file transfer speed at best.

This is less than 1/1000th of the local transfer speed. People will be very unhappy.

Is that what you were looking for? or...?



In the same way that your AD sites should generally mirror your physical topology as closely as possible, your site links should mirror the physical connections between those sites. Create a site link for each physical connection, and name the link something that illustrates which sites are connected by that link, for simplicity. (For example, if you have sites named Chicago and Indianapolis, and there's a direct link between them, you could name the corresponding site link Chicago-Indianapolis, Chi-Ind, or something similar.)

Site link costs are relative values; there's no set cost that should be associated with an ADSL connection, for instance. Just make sure that slower or less reliable links are given higher costs than faster, more reliable ones. This will allow the KCC to determine the most efficient route between sites that have no direct connection between them, if multiple paths are available.

Once you've created all of the links, don't forget to place sites in the appropriate links and remove them from the default site link.



Hi,

To answer the first question. The topology has changed quite a bit since it was established. I would like to have the Site links up to date. My other question would be, if all sites are connected, should my site links reflect that? So if I have sites A, B, and C. I should have Site links A-BC, B-AC, and C-AB? Or can I get away with a less complex replication topology?



If you have three sites and direct connections between all of them, your site links should look like A-B, B-C, and A-C.



Would I need to create reciprocal links, or would the one be OK?

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