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A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is an Internet Service Provider (ISP). If CE1 sends an IP packet to 192.60.100.1, which of the following is FALSE?
Suggested Answer: D
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25 comments · newest first
PA
Paris
6 months ago
I believe option C is also questionable. Why would CSC-PE2 push a BGP label?
JO
Joana
6 months ago
I feel confused about the labels. Why so many?
SH
Shawnee
6 months ago
Agreed! BGP is not used at the CE level.
JO
Josphine
6 months ago
I think option D is false. It doesn't make sense for CE2 to pop a BGP label.
GL
Glenn
6 months ago
Totally agree with Tori, D) doesn't add up!
IR
Irma
7 months ago
Wait, are we sure about C)? That seems weird.
CO
Coral
7 months ago
B) is correct, they do push both labels.
TO
Tori
7 months ago
I think D) is the false one. Sounds off to me.
SA
Salina
7 months ago
A) is true, PE1 definitely pushes an LDP label.
LA
Latricia
7 months ago
C) Yep, that's the one. CSC-PE2 pops the MPLS transport label and pushes the BGP label.
VI
Vivan
8 months ago
Haha, who comes up with these tricky MPLS questions? I need a coffee break!
FR
Francesco
8 months ago
A) I'm not sure about that, the PE1 should be pushing a VPN label, not an LDP transport label.
NI
Nickolas
8 months ago
D) Nah, that can't be right. The CSC-CE2 should pop the BGP label, not push an LDP transport label.
VE
Velda
8 months ago
B) Sounds right, the CSC-PE1 should pop the BGP label and push the VPN label and MPLS transport label.
JO
Johanna
9 months ago
I think option D is definitely false because I don't remember CSC-CE2 using an LDP label in that context. It seems off to me.
NG
Ngoc
9 months ago
I feel like I might be mixing up the functions of PE1 and PE2. I thought both were supposed to push and pop labels, but I can't recall the exact details.
MA
Marya
9 months ago
This question seems similar to one we practiced where we had to identify false statements about label operations. I think B might be the answer, but I need to double-check.
EU
Eura
9 months ago
I remember studying the label operations, but I'm not entirely sure about the role of CSC-CE2 in this scenario.
GL
Gladys
9 months ago
I feel pretty confident about MPLS label operations, so I think I can work through this systematically and eliminate the false statement.
LI
Lilli
10 months ago
Okay, let's think this through step-by-step. CE1 sends a packet to 192.60.100.1, so it will get routed to PE1. From there, I need to follow the labels being pushed and popped at each hop.
VA
Val
10 months ago
Hmm, I'm a bit confused by the CSC VPRN setup. I'll need to review my notes on carrier supporting carrier VPNs to make sure I understand the label operations.
SH
Shawna
10 months ago
This looks like a tricky MPLS routing question. I'll need to carefully trace the packet flow and label operations to determine which statement is false.
IZ
Izetta
4 months ago
I'm leaning towards option C being false.
LA
Latia
5 months ago
I think I need to visualize the packet flow.
CH
Cherry
6 months ago
This is definitely a tricky one!