Am i missing something

[TristramCheer]

Everything i see is about OSPF - Is there a reason noone uses BGP on star-os platform? From what i gather BGP is alot better suited to the task even moreso in a large scale wifi network.

What am i missing here?

[phendry]

Most peeps use OSPF as the IGP and BGP as the EGP. We use BGP on all our Edge routers to peer with other ISP's (which is what it is designed for) and just statics across the core. This way the core routers are not concerned with making routing decisions and can preserve CPU.
Some people find it easier to deploy an OSPF network as BGP requires a full mesh topology or the use of route reflectors.

[TristramCheer]

Yeah i can see why some would use it, but dont they find the zone 0 thing a limit with any large network? i'm no networking guru by any means, its just something i've notices

How large are your networks? i dont see static routes as very managable in a large network, i also like the links to be able to route around a issue should a node go down. from what i understand of static route its something like this

To get to "D" goto A then B then C onto D

With a bgp routed network should C go offline the node the network would detect this and do

To get to "D" goto A then B then E onto D

[phendry]

With OSPF, Area 0 is your backbone or core. You can then have various other areas hanging of Area 0 that all communicate through area 0. This way OSPF is scalable. There are a few issues with this design but there are also work arounds which I can't be arsed to go into here as I could be typing for a while.

Our core is static routes but our edge devices run a combination of BGP and VDS. This means that we have redundancy as a BGP/VDS peer/link will drop if there is a problem with the static core and it means our core is protected from the outside world as all customer traffic is routed through the VDS tunnels. This is a similar topology to an MPLS network with static traffic engineering tunnels across the core.