MX240 Modular Port Concentrator (MPC) Description
Modular Port Concentrators (MPCs) provide packet forwarding services that deliver up to 120 Gbps of full-duplex traffic. The MPCs are inserted into a slot in a router. Modular Interface Cards (MICs) provide the physical interfaces and install into the MPCs. You can install up to two MICs of different media types on the same router as long as the router supports those MICs.
A specialized fixed configuration MPC provides higher port density over MICs and combines packet forwarding and Ethernet interfaces onto a single line card. The fixed configuration MPC is inserted into a slot in a router and contains no slots for MICs.
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. Before transmitting outgoing data packets through the MIC interfaces, the MPCs encapsulate the packets received. Each MPC is equipped with up to four Junos Trio chipsets, which perform control functions tailored to the MPC’s media type. The MPCs interface with the power supplies and Switch Control Boards (SCBs). You must install redundant SCBs to support full line-rate.
The MX240 router supports up to three MPCs. You must install a high-capacity fan tray to use an MPC. For power requirements, see Power Consumption for an AC-Powered MX240 Router or Power Consumption for a DC-Powered MX240 Router.
The router has two dedicated line card slots for DPCs, MPCs, or FPCs. MPCs install horizontally in the front of the router (see Figure 1). One multifunction slot numbered 1/0 supports either one line card or one SCB. The line card slots are numbered 1/0, 1, and 2, bottom to top. An MPC can be installed in any slot on the router that supports MPCs. You can install any combination of line card types in the router.
When a slot is not occupied by an MPC or other line card, you must insert a blank DPC panel to fill the empty slot and ensure proper cooling of the system.
MPCs are hot-removable and hot-insertable. When you install an MPC in an operating router, the Routing Engine downloads the MPC software, the MPC runs its diagnostics, and the Packet Forwarding Engines housed on the MPC are enabled. Forwarding on other MPCs continues uninterrupted during this process.
Figure 2 shows a typical MPC supported on the MX240 router. For more information about MPCs, see the MX Series 3D Universal Edge Routers Line Card Guide.
Figure 1: Typical MPC Supported on the MX240 Router
Figure 2: MPC Installed Horizontally in the MX240 Router
MPC Components
Each MPC consists of the following components:
- MPC card carrier, which includes two MIC slots (excludes the fixed configuration MPC).
- Fabric interfaces.
- Two Gigabit Ethernet interfaces that allow control information, route information, and statistics to be sent between the Routing Engine and the CPU on the MPCs.
- Two interfaces from the SCBs that enable the MPCs to be powered on and controlled.
- Physical MPC connectors.
- Up to four Junos Trio chipsets, which perform control functions tailored to the MPC’s media type.
- Midplane connectors and power circuitry.
- Processor subsystem, which includes a 1.5-GHz CPU, system controller, and 1 GB of SDRAM.
- Online button which takes the MPC online or offline when pressed.
- OK/Fail LED on the MPC faceplate. For more information about LEDs on the MPC faceplate, see the MX Series 3D Universal Edge Routers Line Card Guide.
Two LEDs, located on the craft interface above the MPC, display the status of the line cards and are labeled OK and FAIL.
