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interfaces and install into the MPCs. The user can install up to two MICs of different media types on the
same MPC as long as the MPC supports those MICs.
An adapter card is required only for those MPCs that support adapter card. Not all the MPCs require an
adapter card.
NOTE:
The MX2008 router also supports fixed-port MPCs.
MICs receive incoming packets from the network and transmit outgoing packets to the network. During
this process, each MIC performs framing and high-speed signaling for its media type. Each MPC is equipped
with up to four Junos Trio chipsets, which perform control functions tailored to the MPC's media type.
The MX2008 router supports up to 10 MPCs. For power requirements, see
"Calculating AC Power
Requirements for MX2008 Routers" on page 217
and
"Calculating DC Power Requirements for MX2008
Routers" on page
222.
The router has 10 dedicated line-card slots for MPCs. MPCs install vertically in the front of the router.
The dedicated slots are numbered 0 though 9 (left to right). An MPC can be installed in any line-card slot.
The user can install any combination of MPC types in the router.
When an MPC slot is not occupied by an MPC or an adapter card with MPC, a blank MPC panel needs to
be installed.
MPCs are hot-removable and hot-insertable. When the user installs an MPC in an operating router, the
RCB downloads the MPC software, the MPC runs its diagnostics, and enables the Packet Forwarding
Engines housed on the MPC. Forwarding on other MPCs continues uninterrupted during this process.
Figure 55 on page 164
shows a typical MPC supported on the MX2008 router.
Figure 56 on page 165
shows
an MPC installed vertically in the MX2008 router. For more information about MPCs, see the
MX Series
Interface Module
Reference.
Figure 55: Typical MPC Supported on the MX2008 Router
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