Network to Hardware Address Mapping
Each virtual circuit is a connection between the local computer and a remote computer. Multiple virtual circuits can be grouped into a logical adapter. All virtual circuits on a logical adapter share a common network address (IP) or network number (IPX). Windows sends a packet to a remote computer by submitting the packet to the logical adapter that shares the network address of the remote computer.
The logical adapter must determine on which virtual circuit to send the packet. This is done by examining the host address (IP) or node address (IPX) of the packet and mapping this address to a hardware (MAC) address. The MAC address identifies which PVC to use.
The Address Resolution Protocol (ARP) and Inverse ARP (IARP) are protocols used to dynamically map network addresses (such as an IP or IPX address) to a hardware address (such as the frame relay DLCI).
Inverse Arp Enabled
The SyncLink adapter always processes incoming ARP and IARP requests and responses from a remote computer. The SyncLink adapter, by default, sends ARP requests to determine the address mapping of a remote station. If Inverse ARP Enabled is checked, the SyncLink adapter will send IARP requests instead.
The default setting should work with most equipment (router or computer). If the remote equipment does not respond to ARP requests but does respond to IARP requests, enable (check) this setting. If you are not sure then leave this setting in the default (disabled) state.
Remote IP and IPX Addresses
The remote IP and IPX address fields manually map network addresses to the selected virtual circuit. This is usually done automatically with the ARP and Inverse ARP protocols, in which case these fields can be left blank. If the SyncLink adapter must communicate with hardware from another vendor that does not support the ARP or Inverse ARP protocols, it is necessary to enter the network address of the remote computer or router. It is only necessary to enter the network addresses for network protocols that are enabled. If there is only one virtual circuit defined for the selected logical adapter, these fields can be left blank.
Congestion Logging
Enables or disables Congestion Logging of congestion status changes for this virtual circuit.