Juniper MX960 Hardware Manual page 88

64
Figure 18: Typical DPCs Supported by the Router
DPC 40x1GE DPC 4x10GE
OK / F AIL
OK /FA IL
0/0 0/5
2/0 2/5
1/0 1/5
3/0 3/5
The DPC assembly combines packet forwarding and Ethernet interfaces on a single board, with either two
or four 10-Gbps Packet Forwarding Engines. Each Packet Forwarding Engine consists of one I-chip for
Layer 3 processing and one Layer 2 network processor. The DPCs interface with the power supplies and
Switch Control Boards (CBs).
The router has 11 dedicated DPC slots. DPCs install vertically in the front of the router (see
Figure 19 on page 65). The dedicated DPC slots are numbered 0 though 5, and 7 though 11, left to right.
An additional multifunction slot labeled 2/6 supports either an SCB or a DPC. A DPC can be installed in
any slot that supports DPCs. You can install any combination of DPC types in the router.
If a slot is not occupied by a DPC, a DPC blank panel must be installed to shield the empty slot and to
allow cooling air to circulate properly through the router.
DPCs are hot-removable and hot-insertable. When you install a DPC in an operating router, the Routing
Engine downloads the DPC software, the DPC runs its diagnostics, and the Packet Forwarding Engines
housed on the DPC are enabled. Forwarding on other DPCs continues uninterrupted during this process.