Daniel Karrenberg writes:
Petri Helenius <pete@sms.fi> writes: Using only 56 bits for the IR would effectively defeat the possiblity of using MAC / ESI addresses as the low 48 bits of an IP address.
Sorry I don't get you. The subscriber has 64 bits to play with. That gives 16 bits to select the physical subnet if you choose to use 48 bits for MAC. Do we have a misunderstanding?
OK, I understood you would hand out 56 bits to the IR (having 72 bit prefix for an IR). Which would practically lead for an IR delegating 48 bits or less at a time. If 56 is the prefix length, we're in agreement.(as you below describe) Sorry for the confusion. I hope you make quick progress since we really need to get this allocation stuff up and running. Pete
Here is the lenghts from msb in my proposal:
3 - Provider-Based Unicast Address prefix (010) 5 - regional IR ID (32 is plenty) r - local IR ID (r=56-s) s - subscriber ID (s=56-r) 64 - subscriber local addressing (maybe 16+48 for Petri) --- 128 ===
The values for r would be determined similarly as with current policies:
1) new local IRs get a fixed size allocation 2) furhter allocations will be determined according to usage rate.
Detailed policies such as ranges for r subject to further discussion.
Daniel