Dear RoHCers,
I need clarrification regarding handling of Multiple IP Levels in
Profile -0x0004.
Let us assume 3 level IP as Input IP Packet:
Outermost Ip Outer IP level Innermost IP level
RFC3843 says : Sec3.2. Handling Multiple Levels of IP Headers:
" The IP-only profile defined in this document goes one step further
and supports compression of an arbitrary number of IP levels. This
is achieved by adding a dynamic chain to the general format of
compressed headers, to include the header part of each IP level in
excess of the first two."
" For compressed headers, the information related to the initial two IP
headers is carried as for the IP/UDP profile, and a chain of dynamic
header information is added to the end of the compressed header for
each and every additional IP header. "
Q.1) Which IP level should be considered as Additional IP Level in Profile-
0x004.
Is "IP1" considered as Additional level or "IP3" should be considered
as Additional
level for Implementation?
Q.2) Is this interpretation correct?
IP2 and IP3 levels are compressed and respective fileds are filled in
the compressed header
and IP1 is added as additonal dynamic chain at the end of general
format of compressed header.
Pls share your valuable opinions on the same.
Thanks & Regards,
Narendran.
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