— Exhibit — Click the Exhibit button. Referring to the exhibit, your AS is connected to ISP-A
and ISP-B using BGP. R1 and R2 are advertising your AS’s 172.25/16 prefix upstream to
both ISPs, and both ISPs are providing a full BGP route table. You want to influence traffic
flow so that traffic towards your network enters through R1. Which action would meet the
requirement? Apply the following as an export policy towards ISP-B:
A.
[edit policy-options] user@R1# show policy-statement prefer-for-inbound { term prepend
{ then { as-path-prepend “100 100”; accept; } } } Apply the following as an export policy
towards R1 and R3:
B.
[edit policy-options] user@R2# show policy-statement prefer-for-inbound { term local-pref
{ then { local-preference 110; accept; } } } Apply the following as an export policy towards R2
and R3:
C.
[edit policy-options] user@R2# show policy-statement prefer-for-inbound { term prepend
{ then { as-path-prepend “100 100”; accept; } } } Apply the following as an export policy
towards ISP-A:
D.
[edit policy-options] user@R1# show policy-statement prefer-for-inbound { term local-pref
{ then { local-preference 110; accept; } } }
Explanation: