cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
104454
Views
65
Helpful
19
Replies

Difference between Default-originate and network 0.0.0.0 in BGP

turbo_engine26
Enthusiast
Enthusiast

Hello,

 

Please i need someone to clarify what is the difference between the

"default-originate" command and "network 0.0.0.0 - ip route 0.0.0.0 0.0.0.0 null0" commands. 

I see both are serving the same purpose by advertising a default route to a peer but in the same time i feel a difference on them.

 

Thx

 

Regards,

A.M.

19 Replies 19

Peter, can you explain a scenario where you would use a

route map with the neighbor X.X.X.X default-originate?

Hello,

 

take the example below.

 

The default route to neighbor 10.10.10.2 is injected only if there is a route to 192.168.1.0.

 

access-list 1 permit 192.168.1.0
!
route-map DEFAULT 10 permit
match ip address 1
!
router bgp 1
network 10.0.0.0 mask 255.0.0.0
neighbor 10.10.10.2 remote-as 2
neighbor 10.10.10.2 default-originate route-map DEFAULT

Hi,

 

Thanks for the information, but i still have a little doubt, what is the difference between

default-information originate and default-information originate always ???

Uttkap
Beginner
Beginner

Adding 1 more question to this question ::

Hi,

what is the difference between

default-information originate and default-information originate always ???

Hi Uttkap...

 

There is no such command in

BGP - default-information originate always"... this is for OSPF...

 

In OSPF the

default-information originate

will advertise a default route when such a route is present in the RIB

 

default-information originate always

will make the router advertise a default route regardless of the presence of a default route in the router - hence it ALWAYS originates a default route...

 

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Recognize Your Peers