Paul,
We have a similar technology here a company called Clear Wire is using the same type of technology. They have gone and bought a bunch of older frequencies from the government and put towers up in quite a few tier two cites.
So this is your mobile internet access that you want to load balance users out to the internet not to another site. This probably will make it a little easier now that I have a clear Idea of what it is you're trying to do. What you can do is create an advanced nat policy for each iburst modem. Hmmm have to think about that for a moment.
Well first off how many interfaces do you have on your router.
Second need to figure out if you can do pppoe over trunked sub interfaces don't see why you can't.
Third define your dhcp scope and nat policys for users per modem.
Allocate so many users per modem lets so for example 10 users per modem your nat policy will then be setup in chunks of ten.
First Ten go out subinterface 1 using Nat policy 1 nat policy 1 includes users 192.168.0.50-59
Second Ten go out subinterface 2 using Nat policy 2 nat policy 2 includes users 192.168.0.60-69
You get the idea from there. The subinterface idea will only work if trunked interfaces support pppoe I'm not sure that they do. If not you'll have to have a physical interface for each iburst modme. If pppoe is supported over a trunked interface then you'll just trunk to a switch and vlan it out fore each iburst modem.
HTH
Patrick
If you could
________________________________________
Sent: Saturday, March 25, 2006 5:31 PM
To: 'Patrick Laidlaw'
Subject: RE: 10 PPPoE link via 2811 router
Hi Patrick,
I was mentioning T1's because the actual tech we are using would most likely have been unknown to the majority of readers in the Cicso forums. What we are actually using is a system in Australia that Arraycomm has developed called Iburst (www.iburst.com.au) which basically uses a bunch of towers to transmit data wirelessly across major capital cities at speeds of upto 1Mbps. What we are trying to achieve is to string together 10 or so of these units (they require PPPoE authentication) so that we can create a wireless hotspot at locations which have no existing broadband infrastructure in place or the cost of having a link is prohibitive.
Obviously the more of these Iburst units we can connect together the more bandwidth we can offer clients where they need it (i.e. large events, conferences - that type of thing). For example, at one event we might have a conference with 80 or so people who require internet access - it is our goal to use the 2811 + 1 wireless AP + 10 or so iburst modems to give everyone adequate bandwidth to access the net.
On our side, they are all connected to the same provider which means they all use the same DNS and all have static IP's. The more I have been reading about this, the more it seems (like you say) that it is going to be more than a little tricky to get working well.
Thanks again
Paul
