Air-Stream primarily uses BGP for routing around the domain, some AP owners choose to run another protocol such as OSPF/RIP locally then redistribute into the BGP network, this is fine.
There are filters run on the Air-Stream operated routers to control routing updates and what can and can’t be routed, it’s generally fairly open.
Each AP is assigned its own Private AS (Autonomous System) and AP owners have full control of their own AS in regards to what goes in and out. Initally we started off with OSPF but ran into multicast and topology issues, BGP allowed us to work around this while providing added control over the network so it was a win win situation.
As previously mentioned we like to summarise addresses where possible at the routers and have a good design in place to allow for huge growth. We are able to provide BGP templates for people to use as configs, it really isn’t that hard and configuration isn’t overly advanced for the nodes, about the most interesting thing is that they run in a route reflector client mode due to the topology and iBGP.
QoS
We have QoS(Quality of Service) in place on the Air-Stream routers giving precedence to traffic seen to be important by us(the committee) and the members, we are always open to new suggestions of what should be given more precedence, it’s not the easiest thing to implement when you are going between cisco,linux and bsd routers around the network but it seems to work quite well.
