1.5 ATM PVCs

Is there a reason you used a multipoint ATM sub-interface on ATM3/0.12 on R1?

Could you have also used a pt-to-pt?

Comments

  • I found the answer to my own question.  ISIS will not form a neighbor relationship between a point-to-point interface and a multi-point interface.  The ATM physical interface is seen as a multi-point interface, therefore the subinterface on R1 needs to be multipoint.

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