(d) Given the MPLS network shown below where R1 is the ingress router and R7 is the egress router. R1 R2 R3 R4 R5 R6 R7 is the Label Switching Path (LSP) for this network, where R3 and R6 are not directly connected routers. Let Lij be the label value for the packet sent from router Ri to router Rj, (e.g., L12 is the label value for packet sent from router 1 to router 2).

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
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Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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(d) Given the MPLS network shown below where R1 is the ingress router and R7 is the egress
router.
R1
R2
R3
R6
R7
R4
R5
<R1,R2,R3,R6,R7> is the Label Switching Path (LSP) for this network, where R3 and R6 are not
directly connected routers. Let Lij be the label value for the packet sent from router Ri to router
Ri, (e.g., L12 is the label value for packet sent from router 1 to router 2).
What would be the label(s) in the packet sent by the following routers: (1) R2 (2) R3 (3) R5
Show all labels that would be contained in the packet. Assume penultimate hop popping is being
used. Show your answer as follows:
Label 1
Label 2
Router i
Data Link
IP
Data
Header
Header
Transcribed Image Text:(d) Given the MPLS network shown below where R1 is the ingress router and R7 is the egress router. R1 R2 R3 R6 R7 R4 R5 <R1,R2,R3,R6,R7> is the Label Switching Path (LSP) for this network, where R3 and R6 are not directly connected routers. Let Lij be the label value for the packet sent from router Ri to router Ri, (e.g., L12 is the label value for packet sent from router 1 to router 2). What would be the label(s) in the packet sent by the following routers: (1) R2 (2) R3 (3) R5 Show all labels that would be contained in the packet. Assume penultimate hop popping is being used. Show your answer as follows: Label 1 Label 2 Router i Data Link IP Data Header Header
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