Matthew Stone encountered another unintended consequence of full Internet routing in a VRF design: the TCAM on his 6500 was 80% utilized even though he has the new Sup modules with one million IPv4 routes.
A closer look revealed the first clue: L3 forwarding resources on a Cat6500 are shared between IPv4 routes and MPLS labels (don’t know about you, but I was not aware of that) and half the entries were consumed by MPLS labels:
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