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Cisco MGX 8220 Installation and Configuration
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Chapter
Core Module Overview
Console Ports
There are three hardware console ports located on the ASC back card.
The maintenance port is an RS-232 port used by a direct connect alphanumeric terminal for inputting
command-line interface (CLI) commands. Y-cables cannot be used on this port. This port must be used
to make initial IP address assignments on the other ports before the other ports can be used.
The control port and IEEE 802.3 (Ethernet, LAN AUI) ports are used for inputting commands and file
transfers (statistics collection and firmware download). The control port communicates using SLIP and
the Ethernet port communicates using IP. These ports support TFTP, SNMP, and CLI (through Telnet).
The control port can be used with Y-cables for redundancy when a second ASC card set is present.
Ethernet Transceiver Extenders
Some Ethernet transceivers with integrated DB-15 connectors cannot be connected directly to the
LAN AUI Ethernet port on the Cisco MGX 8220 ASC back card because of interference with the ASC
back card extractor levers. To overcome this problem, two Ethernet transceiver extenders (one each for
a primary and secondary ASC card) are provided.
If you encounter difficulty in connecting an Ethernet transceiver, install an extender on each ASC card.
1. With the retaining clip on the LAN AUI port in the unlocked (up) position, connect the Ethernet
transceiver extender to the LAN AUI port on the ASC back card as shown in Figure 2-12.
2. Push the port retaining clip into the locked (down) position to secure the connection.
3. With the retaining clip on the transceiver extender in the unlocked (up) position, connect the
Ethernet transceiver to the extender as shown in Figure 2-12.
4. Push the extender retaining clip into the locked (down) position to secure the connection.
Figure 2-12 Ethernet Extender
Note Additional access for shelf management is available through in-band communication over the ATM
trunk.
11764
LAN AUI
connector
ASC
back card
Ethernet
extender
Transceiver
Retaining clips