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For the inter-AS model A VPRN. BGP is used as the PE-CE routing protocol. Which of the following statements about the control plane operation is TRUE?
Suggested Answer: B
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32 comments · newest first
AL
Albina
11 months ago
B is definitely wrong, ASBR1 doesn't send updates like that.
SI
Sina
12 months ago
Wait, are we sure about D? Sounds off to me.
XE
Xenia
12 months ago
I think C is the right answer, though.
RE
Reita
1 year ago
Totally agree, that's how BGP works in VPRN!
RE
Regenia
1 year ago
A is correct, PE1 sends the update via MP-BGP.
MI
Mireya
1 year ago
I feel like option D could be correct since it involves ASBR2 accepting a VPN-IPv4 update, but I can't recall the exact flow we studied.
SH
Shalon
1 year ago
I'm a bit confused about the role of ASBR1 in this scenario. Does it really send updates to ASBR2, or is it more about the transformation process?
FL
Florinda
1 year ago
I think option C sounds familiar because it mentions transforming the IPv4 update to a VPN-IPv4 route, which we practiced in a similar question.
KA
Kanisha
1 year ago
I remember something about PE-CE routing protocols, but I'm not sure if PE1 sends the update directly to ASBR1 or if it goes through another step first.
TI
Titus
1 year ago
Okay, I remember learning about this in class. I believe the invoicing process includes the creation of FI-CA documents, discount calculation, and the preparation of invoice print. I'll double-check the other options to make sure I have all the correct answers.
MA
Malcom
1 year ago
The key log file option sounds right to me. That's how I've seen Wireshark decrypt TLS traffic in the past.
IL
Iluminada
1 year ago
Okay, I know XML can handle more complex data structures, but JSON is simpler and more lightweight. I'll focus on those core differences.
GL
Glennis
1 year ago
I think the answer might be C since if googledocs.enabled is false, then the Edit option wouldn't work at all.
OM
Omer
1 year ago
I'm confused about whether just looking at one of those is enough. I remember something in class about a balance between risks, but I can't recall the specifics.
DO
Doug
1 year ago
This is like a routing protocol sudoku puzzle! I bet the engineers who wrote this question were having a good laugh.
CA
Cassi
1 year ago
D) ASBR2 accepts a VPN-IPv4 update from ASBR1, then sends the update to PE2 via MP-BGP.
EL
Eleonore
1 year ago
C) ASBR1 transforms an IPv4 update for prefix 192.168.1.0/27 to a VPN-IPv4 route; allocates VPN label V1 and sends the update to ASBR2.
BO
Bobbie
1 year ago
A) PE1 sends an IPv4 update for prefix 192.168.1.0/27 via MP-BGP to ASBR1.
TA
Talia
1 year ago
Option C seems the most logical to me. The ASBR has to do some VPN-specific processing on the routing update before passing it along.
AU
Audra
1 year ago
Haha, this question is a real brain-teaser! I'm going to have to carefully think this through step-by-step to make sure I get the right answer.
AN
Annice
1 year ago
I'm going with option D. The ASBR on the other side will accept the VPN-IPv4 update and then forward it to the PE router using MP-BGP.
CH
Charlette
1 year ago
Option C seems like the correct answer here. The PE-CE routing protocol is BGP, so the PE router will send an IPv4 update to the ASBR. The ASBR then needs to transform that to a VPN-IPv4 route and allocate a VPN label before sending it to the other ASBR.
BR
Brittney
1 year ago
So, the control plane operation involves transforming the update and sending it with the VPN label.
MI
Micaela
1 year ago
That's right. The ASBR allocates a VPN label before sending the update to the other ASBR.
IR
Irma
1 year ago
Exactly. This process ensures proper routing in the inter-AS model VPRN using BGP as the PE-CE protocol.
RE
Reita
1 year ago
So, the VPN-IPv4 update is then sent from ASBR1 to ASBR2 before reaching the destination PE router.
LO
Loise
1 year ago
That's right. The ASBR then allocates a VPN label before sending the update to the other ASBR.
GL
Glory
1 year ago
I agree, option C is the correct answer. The ASBR transforms the IPv4 update to a VPN-IPv4 route.
VO
Vonda
1 year ago
I agree, option C is the correct answer. The ASBR transforms the IPv4 update to a VPN-IPv4 route.
JE
Jerrod
2 years ago
I'm not sure, but I think D could also be a valid option.
RO
Rory
2 years ago
I agree with Marquetta, ASBR1 transforms the update to a VPN-IPv4 route.
MA
Marquetta
2 years ago
I think the answer is C.