Preemption is a mechanism that allows a higher priority LSP to tear down an existing lower priority LSP in order to obtain the required resources for its establishment. Preemption can occur when there is not enough bandwidth or other resources available on a link or node to accommodate a new LSP request. In this case, the node can select one or more lower priority LSPs that are using the resources and send them a PathErr message with a Preempt error code. This causes the lower priority LSPs to beterminated and release their resources. The node can then allocate the resources to the higher priority LSP and send a Resv message to confirm its reservation34. References:
4: MPLS Applications User Guide | Juniper Networks5
Kylo
What makes Cramkey Dumps so reliable? Please guide.
SamiJul 24, 2025
Well, for starters, they have a team of experts who are constantly updating their material to reflect the latest changes in the industry. Plus, they have a huge database of questions and answers, which makes it easy to study and prepare for the exam.
Lennox
Something Special that they provide a comprehensive overview of the exam content. They cover all the important topics and concepts, so you can be confident that you are well-prepared for the test.
AizaJul 21, 2025
That makes sense. What makes Cramkey Dumps different from other study materials?
Alaia
These Dumps are amazing! I used them to study for my recent exam and I passed with flying colors. The information in the dumps is so valid and up-to-date. Thanks a lot!!!
ZofiaJul 5, 2025
That's great to hear! I've been struggling to find good study material for my exam. I will ty it for sure.
Freddy
I passed my exam with flying colors and I'm confident who will try it surely ace the exam.
AleksanderJul 24, 2025
Thanks for the recommendation! I'll check it out.
Question 9
What is a Label Switched Path (LSP)?
Options:
A.
A protocol used by nodes to exchange information about the state of labels
A Label Switched Path (LSP) is the path created by MPLS nodes that use labels to forward packets across the network. A label is a short identifier that is attached to each packet and indicates the next hop or destination of the packet. The nodes use a label forwarding table to switch packets based on their labels, without inspecting the packet headers. This can improve the performance, security, and quality of service of the network. An LSP can be established by using GMPLS protocols such as OSPF-TE and RSVP-TE, which exchange information about the network topology, resources, and constraints. References : Nokia GMPLS-controlled Optical Networks Course | Nokia, GMPLS - Nokia
Question 10
What is the Commissioning File in GMRE nodes?
Options:
A.
A file with commissioned GMRE nodes for NPA implementation
B.
A file of optical impairment parameters for power balance
C.
A file with target values that determine whether a given LSP is possible
The Commissioning File in GMRE nodes is a file with target values that determine whether a given LSP is possible. The Commissioning File contains parameters such as power, OSNR, Q-factor, and dispersion that are used to evaluate the feasibility of an LSP request. The Commissioning File is generated by the Network Planning Application (NPA) based on the network design and optical impairments. The Commissioning File is uploaded to each GMRE node and is used by the CSPF algorithm to find a suitable path for the LSP. References : Nokia GMPLS-controlled Optical Networks Course | Nokia, Network Planning Application (NPA) | Nokia
Question 11
Which of the following parameters is not considered when restoring an LSP?
The equipment vendor is not a parameter that is considered when restoring an LSP. Restoration is the process of re-establishing an LSP after a failure by using an alternative path that meets the same constraints as the original LSP. The parameters that are considered when restoring an LSP include coloring, reservation priority, maximum latency, bandwidth, protection type, and other QoS attributes. The equipment vendor does not affect the restoration process as long as the nodes support GMPLS protocols and interoperate with each other. References : RFC 4427 - Recovery (Protection and Restoration) Terminology for Generalized Multi-Protocol Label Switching (GMPLS), [Nokia GMPLS-controlled Optical Networks Course | Nokia]
