Motorola BSR 2000 Configuration And Management Manual page 557

Release 1.0
It is important to control defaults in BGP, because a BGP neighbor, in an attempt to
advertise a default route to a specific peer, may send the default to all of its neighbors.
Example
In Figure
Router Miami only. Router Chicago does not receive the default route.
The following commands configure Router Boston:
AS 100
150.20.30.1
Figure 12-13 Dynamically Configuring a Default Route
526360-001-00 Rev. B
A.B.C.D is the IP address of the neighbor.
WORD is the name of the BGP peer group.
WORD is name of the route map. The route map allows route 0.0.0.0/0.0.0.0 to be
injected conditionally.
12-13, Router Boston originates the default route 0.0.0.0/0.0.0.0 toward
MOT(config)#router bgp 100
MOT(config-bgp)#network 150.20.30.0 255.255.255.0
MOT(config-bgp)#neighbor 150.20.20.1 remote-as 200
MOT(config-bgp)#neighbor 150.20.20.1 default-originate
Chicago
IBGP
150.20.20.2
Boston
150.20.20.1
EBGP
MGBI
Configuring BGP
AS 200
Miami
bgp0018
12-39