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Description of Parts
Description of Parts
The CSC-MEC card resides in the router system card cage. Each port on the CSC-MEC provides
one Ethernet interface and connects to an Ethernet applique in the back of the chassis with
internally-routed ribbon cables. Ethernet appliques are available in standard 15-pin attachment unit
interface (AUI) and RJ-45 unshielded twisted-pair (UTP) configurations. The 15-pin appliques
require an external media attachment unit (MAU) or Ethernet transceiver to complete the connection
between the router and your Ethernet network. The 10BaseT applique contains a built-in transceiver
and connects directly to a UTP network segment.
CSC-MEC Card
The two-, four-, or six-port Multiport Ethernet Controller (CSC-MEC) card operates on the
high-speed ciscoBus backplane in the router. A 16-million-instructions-per-second (mips) bit-slice
processor on the card provides a high-speed data path between the CSC-MEC and other high-speed
interfaces on the ciscoBus, and enables switching rates of over 20,000 packets per second for both
bridging and routing. The CSC-MEC supports IEEE 802.3/Ethernet Version 2 specifications by
default, and it supports Version 1 when jumpers on the card are changed as described in the section
"Cables," on page 5.
A six-port card (CSC-MEC6) is shown in Figure 1. Two-port (CSC-MEC2) and four-port
(CSC-MEC4) versions are also available. The card shown in Figure 1 is an MEC controller type 5.1,
card Revision E. Earlier versions of the card, MEC controller type 5.0 (card Revisions A through D)
are not compatible with the second-generation ciscoBus (CSC-CCTL2). Commands for displaying
the card revision (version) are described in the section "System Requirements," on page 7.
Figure 1
The CSC-MEC card must be installed in a router that is running System Software Release 8.3 or later
and that contains a CSC-CCTL ciscoBus controller card. The CSC-C2MEC must be installed in a
router that is running System Software Release 9.1 or later and that contains a CSC-CCTL2
ciscoBus controller card. Instructions for determining your current system software release and the
type of ciscoBus controller installed are provided in the section "ciscoBus Controller Compatibility,"
on page 10.
2 Installing the CSC-MEC and CSC-C2MEC Multiport Ethernet Controller Cards
LEDs (6)
E0
Ethernet connectors
CSC-(C2)MEC6 Controller Type 5.1
U708
U809
U911
U707
U808
U910
U807
U909
U806
U908
Microcode
U705
EPROMs (11)
Version
jumpers
E5
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