Refer to the exhibit An administrator is establishing an MPLS domain to allow
communication between 10.1.0.0/16.10 2 0 0/16. and 10.3 0.0/16. The solution will use
OSPF routing and LDP. Onwhich PE and P devices should these protocols be configured?
A.
All P and PE devices should be configured with MPLS, but only P devices need OSPF.
and only PE devices need LDP.
B.
All P and PE devices should be configured with MPLS, LDP. and OSPF.
C.
All P and PE devices should be configured with MPLS, but only PE devices need OSPF
and LDP.
D.
All P and PE devices should be configured with MPLS and LDP. but only PE devices
need OSPF.
answer A
any one can confirm?
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B.
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I think, A
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As per lab guide:
ALL P/PE are configured with OSPF and MPLS, so B is correct
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OSPF use only P devices and all PE (end to end) devices use LDP.
look for configuration examlpes and seen…
correct is A.
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As per student guide HP ExpertOne Rev. 14.41 below:
Data center: MPLS Basics
Lab Activity 9
Task 2: Configure IP Interfaces and OSPF
Configure OSPF on all P/PE devices……………………………………………………..L9-14
As per student guide:
LDP distributes destination network to label mappings based on entries in the IPv4
routing table. The router’s local IPv4 routing table contains networks learnt via
routing protocols and each IPv4 entry is a possible MPLS FEC.
For each local IPv4 prefix found in the local IPv4 routing table, a local label is
assigned. Administrators can limit label assignment to only certain IPv4 prefixes by
configuring the LSP trigger command appropriately.
If ospf is not run on PE , not sure how the best path be selected between PE and P devices
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B
All devices need to run OSPF, LDP and MPLS
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