BGP default route announce

[Kerem Gursu]

During the configuration of a bgp default route announce,"redistribute static" and "default-information originate" must be defined under bgp conf. Also the default route should be known as a static route entry in the general conf. I thought the static route under the general conf. and the default information originate under bgp conf. would be enough for the default route announcement. I would like to learn the necessity of the "redistribute static" command under general bgp conf.

Regards,

[Harold Ritter · Accepted solution]

"default-information originate" simply allows redistribution of 0/0 via static or dynamic routing protocol in bgp. It doesn't originate the default route as it is the case with ospf.

On the other hand, you could use the "neighbor x.x.x.x default-originate" command to advertise to a specific neighbor without the need to even have the default route installed in the local rib.

hope this helps,