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Old 04-03-2006, 12:25 AM   #1 (permalink)
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Exclamation BES 4 and WAN Latency

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Hi

We are running BES 4 with SP3 HF3 connecting to multiple exchange servers loacted in Australia. One server is located in UK..

Having issues with Wireless activation and delayed delivery for UK users, Australia is mostly OK.

I have been told the issue is probably latency, and logs seem to indicate that we are losing MAPI requests to UK users

I've seen alot of contradictory info on latency in the forums and RIM site.

What i have been unable to find is any definitive information on WAN requirements, e.g.
How do I measure the latency between a BES and Exchange Server.
What is the RIM recommendation/ Requirements for Links

I'm not going to be able to improve the WAN link unless I can show definitively (and testable) that the current link is the issue

Anyone help?
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Old 04-03-2006, 08:30 AM   #2 (permalink)
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well, what's the ping time between the BES and the Exch server for starters?
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Old 04-03-2006, 10:19 AM   #3 (permalink)
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Search for the following article on blackberry's website that outlines best practices for the BlackBerry Enterprise Server, on page 12 it is noted that the recommended ping time to your remote Exchange servers is less than 35ms.
Capacity_Planning_and_Performance_Tuning_for_Envir onments_Using_the_BlackBerry_Enterprise_Solution

Not that it matters though, you will find that installing a Bes server in the same location as the Uk exchange box will prove to be the real fix to this issue. RIM recomends a you install a bes for each seperate location in which you have amail server.
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