I have mixed the E3 linecards (GigE/POS) with E0, E1, E2, and E4+ linecards without any problems. MPLS, MPLS TE, Input ACLs, Netflow, and MQC service-policies all work well. I wish that I had a pure E3 linecard environment. Michael Lyngbøl wrote: >All boxes are eng3 only though. There might be issues when mixing w/ >older line cards in the same chassis? > >