Referring to the exhibit, from which device(s) does R3 learn about Route X?

The correct answer is D. R2 only. R2 can not forward IBGP learned routes to another IBGP neighbor correct R3 will learn about Route X from R2 only. R1 is in a separate AS and Route X is advertised to R2 through eBGP. R2 will then advertise the route to R3 using iBGP. R3 cannot learn routes directly from another…

BGP

Question

Exhibit

Options

Aboth R2 and R1
BR1 only
Cdirectly from the router in AS 64502
DR2 only

How the community answered

(37 responses)

A
14% (5)
B
3% (1)
C
11% (4)
D
73% (27)

Explanation

R2 can not forward IBGP learned routes to another IBGP neighbor correct R3 will learn about Route X from R2 only. R1 is in a separate AS and Route X is advertised to R2 through eBGP. R2 will then advertise the route to R3 using iBGP. R3 cannot learn routes directly from another AS without having a direct eBGP session with that AS.

Topics

#iBGP route propagation#BGP split horizon#AS path#route reflection

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