Thomas Kunz
Systems and Computer Engineering
24
Encapsulation I
nEncapsulation of one packet into another as payload
–e.g. IPv6 in IPv4 (6Bone), Multicast in Unicast
(Mbone)
–here: e.g. IP-in-IP-encapsulation, minimal encapsulation
or GRE (Generic Record Encapsulation)
nIP-in-IP-encapsulation (mandatory, RFC 2003)
–tunnel between HA and COA
Care-of address COA
IP address of HA
TTL
IP identification
IP-in-IP
IP checksum
flags
fragment offset
length
DS (TOS)
ver.
IHL
IP address of MN
IP address of CN
TTL
IP identification
lay. 4 prot.
IP checksum
flags
fragment offset
length
DS (TOS)
ver.
IHL
TCP/UDP/ ... payload