> More over, 4rd-U claims to solves a number of issues that the MAP suite of
> documents does not address. It would be beneficial to have
> a discussion on the mailing list to see if a) those issues are important or
> not and b), if they are, are they properties of 4rd-U or could they be solved
> as well
> in MAP, they just have not been addressed there yet.
here is a comparison table of the feature differences between MAP and 4rd-U.
(try a fixed width font if it doesn't survive your particular MUA mail mangling
algorithm.)
Appendix A. Comparions of stateless A+P solutions
+-------------------------------+----------------+------------------+
| Feature | MAP | 4rd-U |
+-------------------------------+----------------+------------------+
| Encapsulation | Y | Y |
| Translation | Y | Y |
| Hub and Spoke mode | Y | Y |
| Nested CPE | N | Y |
| End-user prefixes > 64 | Y | N |
| E-mode: Support for IPv4 | Y | N |
| options | | |
| T-mode: MF bit and TOS bits | N | Y |
| transparency | | |
| T-mode: Checksum | L4 rewrite | CNP |
| H & S set bit 79 needed | N | Y |
| Interface-id | RFC6052 | V octet |
| MAP traffic identified by | Address/prefix | Interception of |
| | | V octet |
| Port mapping algorithm | GMA. Prog. | GMA. Fixed |
| Fragment forwarding on BR | N | Y |
| without reassembly | | |
| Shared fragmentation id space | N | Y |
| BR rewrite fragmentation | N | Y |
| MSS update | Y | N |
| Complete IPv6 address / | Y | N |
| prefix | | |
| Provisioned with DHCP | Y | Y |
+-------------------------------+----------------+------------------+
Table 1: A+P comparison
let us make it clear that these two solutions are solving exactly the same
problem, and they solve it in the same fundamental way (A+P). the differences
we're talking about here are what whistles, bells (and dongs) we want to add on
to the base specification. consider it a buffet, any feature from one of them
can be applied to the other.
cheers,
Ole
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