R2 is receiving a route from R1 and you must ensure that the route is not advertised to R3. Referring to the exhibit, which two configurations on R2 will solve the issue? (Choose two.)

The correct answer is A. Apply the no-export policy as an import policy under group 65001 D. Apply the no-advertise policy as an import policy under group G5001. We can either tag the route inbound on peer group 65001 to set the no-export community. This will prevent it being exported to peer 65003, since it is at an AS boundary. Alternatively, we can tag the no-advertise community inbound on the peer group 65001 which will not…

Advanced BGP

Question

Exhibit

Options

AApply the no-export policy as an import policy under group 65001
BApply the no-advertise policy as an export policy under group 65003
CApply the no-export policy as an export policy under group 65003
DApply the no-advertise policy as an import policy under group G5001

How the community answered

(42 responses)

A
79% (33)
B
14% (6)
C
7% (3)

Explanation

We can either tag the route inbound on peer group 65001 to set the no-export community. This will prevent it being exported to peer 65003, since it is at an AS boundary. Alternatively, we can tag the no-advertise community inbound on the peer group 65001 which will not advertise the route to any peer, including iBGP peers. In this example it has the same effect.

Topics

#BGP communities#no-export#no-advertise#import/export policy

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