OSPF and iBGP adjacencies at border: OSPF to dual Cat9K core over dedicated 100G interfaces; iBGP routed hop to second border ASR 9K over 100G.

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OSPF and iBGP adjacencies at border: OSPF to dual Cat9K core over dedicated 100G interfaces; iBGP routed hop to second border ASR 9K over 100G.