Which two statements about Frame Relay Point-to-Point connections are true?

Which two statements about Frame Relay Point-to-Point connections are true? (Choose Two)
A. Changing a point-to-point sub interface to a different type requires the device to be reloaded.
B. They use two DLCIs to communicate with multiple endpoints over the Frame Relay cloud.
C. The device can establish a point-to-point connection to the cloud without a DLCI.
D. They can operate normally without a DLCI map.
E. Each physical interface that extends to the Frame Relay cloud can support a single SVC.

cisco-exams

4 thoughts on “Which two statements about Frame Relay Point-to-Point connections are true?

  1. http://www.ciscopress.com/articles/article.asp?p=170741&seqNum=6
    On point-to-point subinterfaces, you do not need to use the frame-relay map command to perform static address mapping, because it is always assumed that the end point of the point-to-point connection automatically resides on the same subnet as the start point. It is also not required to enable or disable Inverse ARP, because there is only a single remote destination on a point-to-point PVC and discovery is not necessary.
    A, D

    1. The issue here imo is that the statement “They can operate normally without a DLCI map.” is to vague. Because you still end up with DLCI mappings, only they will not be mapped statically to any IP-addresses. But if you perform the show frame-relay map command, you’ll still see the DLCI mappings which are dynamic and don’t point to any IP-addresses. If D stated static address mappings (like it does in some other CCNP questions), I would totally agree.

      From a global topoloty view B sounds correct, but it is very misleading as well… A router can get to every other router in the Frame Relay network with only having 1 DLCI and VPC connected to the Frame Relay switch. However, in a point-to-point topology you need a DLCI per point-to-point connection, so 1 DLCI in the entire topology is obvisouly not enough to communicate with more than 1 other Frame Relay endpoint.

  2. Q. Can I change subinterfaces from point-to-point to multipoint or the reverse?

    A. No, after a specific type of subinterface is created, it cannot be changed without a reload. For example, you cannot create a multipoint subinterface Serial0.2, and change it to point-to-point. To change it, delete the existing subinterface and reload the router or create another subinterface. When a subinterface is configured, an interface descriptor block (IDB) is defined by the Cisco IOS® Software. IDBs defined for subinterfaces cannot be changed without a reload. Subinterfaces that are deleted with the no interface command are shown as deleted by issuing the show ip interface brief command.

Leave a Reply

Your email address will not be published. Required fields are marked *


The reCAPTCHA verification period has expired. Please reload the page.