EaStMAN EaStMAN MOC: Proposed Private ATM Address Scheme


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Proposal for EaStMAN Private ATM Address Structure

A scheme for private ATM address scheme within EaStMAN is proposed. It follows the recommendations made in the UKERNA interim private ATM addressing scheme.

The major features of the plan here are

To aid in following the assignments, it helps to be familiar with the topology diagram.

The Scheme

The proposed 13 octet prefix for EaStMAN on on campus entities is (dots are employed to separate fields):
            39.826f.1107.16.7000.00.nnmm.ee.ff
where

Alternatives

It is possible for the HEIs to use their own site codes instead of the EaStMAN code - this would allow recognition of the HEI very quickly from the form of the address - and one would not need an artificial construct as per the above scheme. It would also imply that the mask which defined a point of access on the ATM ring could be shorter - it would include the HEI site code and at least one other octet to enumerate the switch. Thus, we would save probably 1 octet - or rather make one more octet free for assignment. In addition, although we might see the institution address separated by another (e.g. QMC-L between UoE OC and Nap-M) the routing would probably not be difficult to configure (as also PNNI). However, it would be more difficult to create a mask `all EaStMAN' which might be desirable in the future (anycast services) - this would need to reply on the region octet which might not be a one-to-one map with EaStMAN in the future.

EaStMAN partners are invited to consider and comment on their preference as soon as possible.


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