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jskfanFlag for Cyprus

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Exchange 2010 Hub/Edge redundancy

In exchange 2010, there is a redundancy in Mailboxes database through DAG. if one MB server fails the other MB servers will be the active.

What about the HUB servers, if we put 2 Hubs how do they share their mail.que DB ? the same for edge servers, if one of the Edge servers fails ?

Thanks
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it s not quite what I wanted to know.

let s say we initially had one Hub so there is one hub dumpster database[mail.que], then we added a second one. So even with NLB they won't have the same dumpster DB. in case an active MB database fails while the transaction logs is on the way to the passive MB database, then the passive MB database would not know from which Hub dumpster to pick up the missing record related to the failed T.log



I believe Edge servers, there is not too much of redundancy, since from the beginning they will have to import/export the configuration. I am not sure if we ll have to install anti virus/spam if we need to install it on both Edge servers.
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the scenario I described is the active MB server has failed while the T.log is on its way to the passive MB. Normally, in this case if there is only one HUb, then the passive MB will ask the HUB to send the  record that s related to the missing T.Log, but when there are 2 Hubs, is the passive MB gonna ask both hubs for the failed log?
I am not sure exactly what all the servers[MB and HUB] are using as protocols in order to recover from any failed T.log between MB databases.
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THANKS