Serial interfaces don't have MAC addresses. IPX is a special case because the network-layer node address IS the MAC address.
Think about frame formats and identifications for WAN protocols. What identifies the sender in Frame Relay? A DLCI. How about ATM? A VPI/VCI pair. How about PPP? No need because it's point-to-point. How about HDLC. No need because it's point-to-point (in Cisco HDLC anyway). How does a network layer address get mapped to a data-link identifier? Static mapping or Inverse ARP for some protocols. PPP has the NCP which sits between the two layers. Priscilla At 02:51 PM 1/14/02, Cisco Nuts wrote: >Hello, >Is there a way of verifying that a serial port in borrowing the mac address >of the Ethernet/Tr port when it is connecting to another router in an IP >network? >I see this in an ipx network but not in an ip network. sh ipx int s0 > >I tried the debug ip packet, detail, debug arp, debug broadcast etc. but I >am not seeing that the serial port is using a mac address. > >What test can I do on my router to check that the serial port does borrow >the first available Mac address of a Ethernet port on a router? > >Thank you. > >_________________________________________________________________ >Join the worlds largest e-mail service with MSN Hotmail. >http://www.hotmail.com ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=31904&t=31898 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
