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tmaususerFlag for United States of America

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VPN Router - bird's eye view

work for a medium size company.  We have a 5508x firewall with IPSEC Remote Access VPN setup on it and an AnyConnect setup too.  These work fine when an individual client logs in with client software.  
We have a remote warehouse that uses the VPN buy logging the same – as a client.
Sometimes they complain about the speed.  We were thinking if we bought a RV260 Remote VPN router that we could just put it at the warehouse and enter our public address and a few credentials and this would improve the speed and simplicity.  It is not that simple.  So, I have some questions.
Do we need two remote VPN routers, one at the main office and one at the warehouse?  Then, do we need a separate Internet connection?  Does the ASA act as the VPN router on our side?  
I have a simple guide to setup the VPN router, but I unclear about the general setup.
Do I need to setup a site-to-site tunnel , which I don’t know how to do?  I barely understand the IPSEC, IKE, Duff-Hillman, AES-192, etc.   I imagine both sides have to match?
Anyway, I am not very clear on how the device functions.  Do I need two, do I need to attach one to the firewall, what’s the general idea of how this works?  Could someone give me a quick bird’s eye overview?
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David Johnson, CD
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A site-site vpn vs a client-site vpn won't change the access speed.  You will always be limited to the bandwidth of each end of the tunnel. A vpn will be slower than a direct connection since the data is encapsulated.. This is measurable but not usually an issue.
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If I follow the VPN setup wizard in ASDM it wants me to enter a IKE pre-shared key but elsewhere warns that the key be shared with all VLAN connections.  If I enter the same pre-shared key will the other VPN connections still work, or will a new hash be made and mess  up the existing profiles?
a VLAN is not a VPN

It will be a separate unique profile
typo, I meant VPN
David was helpful in a similar question I asked.
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tmaususer
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