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Subnet Mask Selection for ATM Backbone

Unanswered Question
Mar 3rd, 2002
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Is there a disadvantage of assigning a 30 bit mask to an ATM interface which is part of a ATM backbone using Multipoint? With a hub and spoke design serial links are commonly assigned 30 bit masks to conserve IP addesses and reduce routing table. Is true in designing an ATM backbone too?

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bsivasub Sun, 03/03/2002 - 19:47
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why not !!! It should be fine... Not aware of any atm specific issues... just treat that like any other wan connection.

svermill Mon, 03/04/2002 - 08:02
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I would base the mask on the number of end points on that multipoint. A /30 mask allows for only two. You may very well need more I would think.

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