How is the "next hop" done between system interfaces when the destination has no MAC address? Possibly another way to ask the question is "How is data transfer between interfaces on the same system done?" Is there an rfc or standard which specifies this? The reason I ask is that OpenVPN tun interfaces (client and server) don't have MAC addresses. My former understanding was that ARP was used to determine the next hop (either a router or the destination system depending on the situation) MAC address in order to transmit the frame but that obviously doesn't apply in this situation. I haven't been able to find anything which discusses how frames move from interface to interface internally on a system. Leroy Tennison Network Information/Cyber Security Specialist E: leroy@xxxxxxxxxxxxxxxx 2220 Bush Dr McKinney, Texas 75070 www.datavoiceint.com This message has been sent on behalf of a company that is part of the Harris Operating Group of Constellation Software Inc.If you prefer not to be contacted by Harris Operating Group please notify us. This message is intended exclusively for the individual or entity to which it is addressed. This communication may contain information that is proprietary, privileged or confidential or otherwise legally exempt from disclosure. If you are not the named addressee, you are not authorized to read, print, retain, copy or disseminate this message or any part of it. If you have received this message in error, please notify the sender immediately by e-mail and delete all copies of the message.
