[CentOS] regarding vpn server for 1500 clients

Les Mikesell wrote:
> Ray Van Dolson wrote:
>   
>> How about lots of GRE tunnels? :-)
>>     
>
> I've done that with a few connections - mostly connecting to Cisco 
> routers to pass multicast streams.  I'm not sure how it would scale up 
> in terms of the interface numbers and managing routes but it should work.

What was the network environment like that the tunnels went over?