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MPLS over ATM

Here you will find answers MPLS over ATM Questions

Question 1

Refer to the exhibit. Which two of the following statements about the MPLS configurations are true? (Choose two)

MPLS_over_ATM.jpg

A. The VPI range being configured is the default VPI range.
B. The router is missing the mpls label protocol ldp configuration command on its ATM 0/0.1 subinterface to make it an LC-ATM enabled subinterface.
C. There is a problem with the configurations because the control VC should be set to 0 32 instead.
D. The ATM switch is using VC merge since VC merge is enabled by default.
E. For MPLS label allocations, both VPI 6 and 7 can be used.

 

Answer: D E

Explanation

We use the “mpls atm vpi <vci-range>” to configure the range of values to use in the virtual path identifier (VPI) field for label virtual circuits (LVCs).

The command “mpls atm control-vc <vpi> <vci>” is used to configure the control-VC virtual path identifier (VPI) and virtual circuit identifier (VCI) values for the initial link to the Multiprotocol Label Switching (MPLS) peer.

In the above exhibit, the command “mpls atm control-vc 6 32” means that we select 6 for VPI and 32 for VCI.

Note:

The default VPI range is 1-1.
The default VCI range is 33-65535.
When using the command mpls atm control-vc <vpi> <vci>, both end should have same configuration of this parameter.

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