In this case, we can see a special tunneling interface called ISATAP [RFC5214]. The so-called physical address is really the hexadecimal encoding of an IPv4 address:
0A-99-8D-87 is the same as
10.153.141.135. Here, the OUI used (
00-00-5E) is the one assigned to the IANA [IANA]. It is used in combination with the hex value
fe, indicating an embedded IPv4 address. This combination is then combined with the standard link-local prefix
fe80::/10 to give the address
Example of forming physical address of ISATAP tunneling interface.
Share this highlighthttp://www.safaribooksonline.com/a/tcpip-illustrated-volume/16035/