PE1 and PE2 provide a BGP-signaled VPLS service named VPN Blue. PE1 has site ID 2, label base 2500, andlabel offset 1. PE2 has site ID 4, label base 3000, and label offset 1.
Which label does PE2 expect to receive on VPLS VPN Blue traffic received from PE1 site ID 2?
A.
2505
B.
5499
C.
2503
D.
3001
Explanation:
The formula used is VPN label = label-base-remote + local-site-id – label-offset-remote, which here is 2500 + 4
-1 = 2503.
https://inetzero.com/verifying-a-bgp-signaled-vpls/
I think the answer is D
TX=remote base label+local site ID-remote offest
RX= local base labe+remote site ID-local offset
So, PE2 should be expecting to receive 3001 (3000+2-1)
and it should be transmitting 2503 (2500+4-1)
remote label (or transmit label) = remote base + local site id – remote offset
local label (or receive label) = local base + remote site id – local offset
correct is D