Query regarding hub and spoke VPN's between multiple sites
I currently have a "hub" ASA 5505 that links to 4 sites running 877 routers.
From the hub network i can connect to all sites fine but what i would like to do is to almost compartmentalise the various VPN links into little clusters.
The hub ASA 5505 basically provides IP telephony through the VPN's from a PBX allowing the users at the other end of the VPN to make outgoing calls and recieve incoming calls. However, a couple of the sites would like to be able to call between eachother internally via the hub. This obviously requires traffic to be allowed between their various networks.
Currently when you attempt an internal call it rings but there is no audio either way. I assume this is due to access list restrictions. I am not even sure whether what I am trying to achieve is possible as I'm a little bit of a rookie but any help would be appreciated. I've attached the hub and 2 spokes below.
The ideal end result would be interconnectivity between the two spokes via the hub, from reading up it would seem that its possible but i can't quite get my head around it! Would it involve using different subnet masks at the hub?
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