AIS AI2524 user manual Frame-relay interface-dlci dlci

AI2524 Router Card User’s Manual

You can configure some protocols for dynamic address mapping and others for static address mapping.

Accept Inverse ARP for Dynamic Address Mapping on Multipoint

Subinterfaces

Dynamic address mapping uses Frame Relay Inverse ARP to request the next hop protocol address for a specific connection, given a DLCI. Responses to Inverse ARP requests are entered in an address-to-DLC mapping table on the router or access server; the table is then used to supply the next hop protocol address or the DLCI for outgoing traffic.

Since the physical interface is now configured as multiple subinter- faces, you must provide information that distinguishes a subinterface from the physical interface and associates a specific subinterface with a specific DLCI.

In interface configuration mode, associate a specific multipoint sub- interface with a specific DLCI:

frame-relay interface-dlci dlci

Inverse ARP is enabled by default for all protocols it supports, but can be disabled for specific protocol-DLCI pairs. As a result, you can use dynamic mapping for some protocols and static mapping for other pro- tocols on the same DLCI. You can explicitly disable Inverse ARP for a protocol-DLCI pair if you know the protocol is not supported on th other end of the connection.

Because Inverse ARP is enabled by default for all protocols that it sup- ports, no additional command is required to configure dynamic ad- dress mapping on a subinterface.

Example: Frame Relay Multipoint Subinterface with

Dynamic Addressing

This example configures two multipoint subinterfaces for dynamic ad- dress resolution. Each subinterface is provided with an individual pro- tocol address and subnet mask, and the interface-dlcicommand associates the subinterface with a specified DLCI. Ad- dresses of remote destinations for each multipoint subinterface will b resolved dynamically.

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