bgpd - neighbor definition


        neighbor 10.0.1.0 {
                remote-as       65003
                descr           upstream
                multihop        2
                local-address   10.0.0.8
                passive
                holdtime        180
                holdtime min    3
                tcp md5sig password deadbeef
                announce        self
        }
Very cool: the annnounce keyword
none: don't announce any networks
self: announce only our own networks
all: announce everything we know
default-route: announce a default-route and nothing else
On cisco/zebra you need filters for this