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Packets arrive at the VPRN SAP on PE1 with DSCP marking of all. According to the QoS policies applied at routers PE1, P, and PE2, what is the DSCP value of packets egressing router PE2? (All the SDPs are MPLS-encapsulated, and all interfaces are using their default trust states).
Suggested Answer: B
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15 comments · newest first
FA
Fatima
11 months ago
Totally agree with af11, makes sense with the default trust states.
NO
Nobuko
11 months ago
Wait, are we sure about that? I thought it was af33!
ER
Erick
11 months ago
Definitely af31, that's the standard for MPLS.
FR
Francoise
12 months ago
I think it should be af12, not sure about af11.
KI
Kiera
12 months ago
PE2 will egress with af11 based on the policies.
AZ
Azalee
12 months ago
I think I remember that PE1 applies some marking based on the incoming DSCP, but I’m not clear on how that translates to PE2. I hope I can remember the right mappings!
RI
Richelle
1 year ago
I feel a bit confused about the specific mappings for AF classes. I think AF11 and AF12 are lower priority, but I can't recall which one would be correct here.
IS
Isaiah
1 year ago
This question seems similar to one we practiced where we had to determine DSCP values after passing through multiple routers. I think the default trust state means the original DSCP should remain intact.
JU
Junita
1 year ago
I remember studying DSCP values and how they map to different QoS classes, but I'm not sure how the MPLS encapsulation affects the egressing packets.
KA
Kattie
1 year ago
This seems straightforward. The key is understanding how the QoS policies are applied at each router. If I can map out the DSCP value changes, I should be able to determine the final DSCP value at PE2.
AL
Albina
1 year ago
Okay, I think I've got this. The packets arrive at PE1 with DSCP marking of all, so the QoS policy at PE1 must be modifying that. Then the MPLS encapsulation and trust state at the other routers will also impact the final DSCP value. I'll work through it step-by-step.
NU
Nu
1 year ago
This looks like a tricky DSCP marking question. I'll need to carefully review the QoS policies applied at each router to determine the final DSCP value.
MA
Maurine
1 year ago
Hmm, I'm a bit confused by the wording of the question. I'll need to make sure I understand the MPLS encapsulation and default trust state details before I can answer this.
HO
Hobert
1 year ago
I've got a good handle on IPv6 routing, so I think I can figure this out. I'll carefully consider each answer choice and match it to the information given in the question.
ZO
Zona
1 year ago
This looks like a tricky question about the item master. I'll need to carefully read through each statement and think about what I know about item master organizations and attributes.