10 Questions
What is the purpose of Penultimate Hop Popping (PHP) in an MPLS network?
To optimize MPLS performance by reducing CPU effort on Edge LSRs.
Where is label lookup performed in MPLS packet forwarding?
LFIB only
What happens in a double lookup scenario in MPLS packet forwarding?
LFIB lookup is performed twice before forwarding the IP packet.
When does Penultimate Hop Popping (PHP) occur within an MPLS domain?
On the Egress LSR
What does the pop or implicit null label value of 3 indicate to a neighbor in an MPLS network?
Use PHP for packet forwarding
Which router in an MPLS domain removes the label before the last hop?
Penultimate router
What is the role of LFIB in MPLS packet forwarding?
Performing label lookups
Which action is associated with PHP optimization in MPLS networks?
Removing labels at second last hop within an LSP.
Where does PHP optimization typically take place within an MPLS network?
At the Egress LSR.
What is a common benefit of using Penultimate Hop Popping (PHP) in an MPLS network?
Optimizing network performance.
Test your knowledge on different switching mechanisms in Cisco 10S platform, including process switching, fast switching, topology-driven switching, Cisco Express Forwarding, and MPLS switching overview. Explore concepts like CEF, internal MPLS characteristics, and more.
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