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Hardware Component Overview
FPC Types
The router supports two types of FPC, shown in Figure 6:
FPC1 (standard or enhanced)—Supports PICs including single-port
OC-12/STM-4 and Gigabit Ethernet.
FPC2 (standard or enhanced)—Supports higher-speed PICs including
OC-48/STM-16 and Tunnel services.
You can install any combination of FPC types together on the router.
FPCs are hot-removable and hot-insertable, as described in Field-Replaceable Units
(FRUs) on page 4. When you remove or install an FPC, packet forwarding halts
forabout200mswhilethePacketForwardingEngineadjuststothechangein
the amount of memory available in the pool located on and shared by all FPCs.
When you install an FPC into a functioning router, the Routing Engine downloads
the FPC software, the FPC runs its diagnostics, and the PICs housed on the FPC
are enabled. Forwarding continues uninterrupted during this process. For FPC
replacement instructions, see “Replacing an FPC” on page 169.
Enhanced FPCs have I/O Manager ASICs capable of enhanced quality of
service, and 2 MB of SSRAM. Enhanced FPCs can be identified through
theCLI,orbyastickeronthefaceplate.
The PICs that install on both types of FPC are also hot-removable and hot-insertable.
For more information, see “Physical Interface Cards (PICs)” on page 13.
Packet Forwarding Engine 17