[AR1-bgp]peer 10.0.12.2 default-route-advertise conditional-route-match-all ???,条件满足缺省路由,所有条件都要满足
[AR1-bgp]peer 10.0.12.2 default-route-advertise conditional-route-match-any ???,满足任意条件
[AR1-bgp]peer 10.0.12.2 default-route-advertise route-policy 11 conditional-route-match-any 0.0.0.0 ,条件产生缺省路由并且改变缺省路由的属性。
network,import可以产生缺省路由。
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