Click the Exhibit button. You are asked to establish full connectivity between all devices in the BGP network. Referring to the exhibit, which two configuration changes will allow BGP route advertisements? (Choose two.)
A.
On R2, include the loops 2 statement at the [edit protocols bgp family inet unicast] hierarchy.
B.
On R1 and R3, include the loops 2 statement at the [edit protocols bgp family inet unicast] hierarchy.
C.
On R1 and R3, include the advertise-peer-as statement at the [edit protocols bgp group external] hierarchy.
D.
On R2, include the advertise-peer-as statement at the [edit protocols bgp group external] hierarchy.
C,D
Option C: On R1 and R3, include advertise-peer-as at [edit protocols bgp group external].
This allows R1 and R3 to accept BGP routes from R2 even though they contain AS 64512 in the AS path. Without this, R1 and R3 will reject updates from R2 because they contain AS 64512 in the AS path.
Option D: On R2, include advertise-peer-as at [edit protocols bgp group external].
This tells R2 to advertise routes back to AS 64512 (R1 and R3), even though they originated from AS 64512.
B and D is correct.
https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/ref/statement/advertise-peer-as-edit-protocols-bgp.html
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