Chapter 3
| 1. | What does the push operation do on a labeled packet? |
| A1: | Answer: The push operation replaces the top label with another and then pushes one or more labels onto the label stack. |
| 2. | Which Cisco IOS command do you use to see what the swapped label is and which labels are pushed onto a received packet for a certain prefix? |
| A2: | Answer: show mpls forwarding-table [network {mask | length}] [detail] |
| 3. | What does the outgoing label entry of “Aggregate” in the LFIB of a Cisco IOS LSR mean? |
| A3: | Answer: The outgoing label entry “Aggregate” means that the LSR removes the label and does an IP lookup to be able to determine where the packet needs to be forwarded. |
| 4. | What label value signals the penultimate LSR to use penultimate hop popping ... |
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