Response packets for internal services (such as telnet, http/https, tftp, etc.) from the device to recipients in the Ethernet (LAN or WAN) were, prior to LCOS version 7.80, always sent directly to the requester. This meant, among other things, that devices could be discovered from within any LAN.
As of LCOS version 7.80, a switch provides the option to initiate an ARP request to determine a specific route, instead of using the direct address.
If, for example, a LANCOM router should be detected by LANconfig without any knowledge of the LAN topology, then the older method would be preferable. In this case, the sender of the TFTP broadcast receives a direct unicast response from the router (in this case: Device search in LANconfig).
In scenarios where LANs use changing virtual MAC and IP addresses (e.g. when VRRP components are used in the LAN), direct addressing may lead to errors if the redundancy protocol has adjusted the MAC/IP assignments. In such cases it is preferable to activate the "route internal services" option.
