Static Frame Relay Mapping

Static Frame Relay mapping refers to the manual configuration of the mapping between a DLCI (Data Link Connection Identifier) and the Layer 3 address (usually an IP address) of a remote device in a Frame Relay network. This is in contrast to dynamic mapping, which uses the Inverse ARP (Address Resolution Protocol) process to automatically map the Layer 3 address to the DLCI.

Static Frame Relay mapping is often used when the remote device is not capable of running Inverse ARP, or when there is a requirement for a fixed mapping between the Layer 3 address and the DLCI.

To configure static Frame Relay mapping, the administrator needs to manually assign a DLCI to each remote device and configure the mapping between the DLCI and the remote device’s Layer 3 address on the local router. This is typically done using the following command:

frame-relay map ip <remote_ip_address> <dlci> [broadcast]

<remote_ip_address> is the Layer 3 address of the remote device.

<dlci> is the Data Link Connection Identifier assigned to the remote device.

[broadcast] is an optional keyword that specifies that broadcasts should be sent over the DLCI.

For example, to configure a static mapping for a remote device with IP address 10.1.1.2 and DLCI 102, the following command can be used:

frame-relay map ip 10.1.1.2 102 Static Frame Relay mapping can be verified using the show frame-relay map command, which displays the mapping between the DLCIs and the Layer 3 addresses.