When do we use “interface-dlci” and when “map ip” on Frame Relay ?


We know that on Frame Relay relies on the mapping between DLCI to IP Address and this is done by using Inverse ARP. We also know that without using dynamic mapping, we can also use static mapping using command frame-relay map.

The different between the two is that frame-relay interface-dlci is used for point-to-point subinterfaces and frame-relay map is used for multipoint subinterfaces.

The logic behind it is basically in point-to-point network the next-hop is always known and whatever the interface thrown at will be passed to the next-hop. All we need to do is to define what the interface DLCI number is.

For multipoint subinterfaces, the situation is different. One subinterface faces multiple end-points. Therefore, there is a need to define which DLCI mapped to which IP Addres

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About ccie4all
Hello, and welcome to the first post of my CCIE blog This blog has got one simple goal and that is to improve our skills in Cisco Networking field so we can become best engineers on a job market. Wordpress Blog https://ccie4all.wordpress.com/ information about the changes made to Gns3 BGP , MPLS and R&S CCIE labs. In order to access and download all provided materials and receive important updates from Gns3 BGP , MPLS and R&S CCIE labs under GNS3 tab in the main header please go ahead and subscribe to https://ccie4all.wordpress.com/ ! All other posts have not been affected and can be accessed at any given time. Enjoy ! Tom

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