Cisco Systems 7200 VXR Fast Ethernet MII Connections, 3-33, 26 Fast Ethernet Port Connection

Chapter 3 Installing a Cisco 7200 VXR Router

Connecting I/O Controller, NPE-G1, or NPE-G2 Cables

Fast Ethernet MII Connections

The MII port on the I/O controller is a 40-pin, D-shell-type connector that is configurable for

100 megabits per second (Mbps). The MII port supports IEEE 802.3u interfaces compliant with the 100BASEX and 100BASET standards. The MII connection requires an external transceiver that permits connection to 100BASEFX or 100BASET4 physical media. (See Figure 3-26.)

Figure 3-26 Fast Ethernet Port Connection

1

SLOT	1		MII
		FE

ENABLED

PCMCIA EJECT SLOT 0

		T
		SE
-45	PU	RE
RJ	C

MII	RJ45	RJ45	PWR
EN	EN	LINK	1O OK

FAST ETHERNET INPUT/OUTPUT CONTROLLER

84539

2 3

	4	5
1	Optional Fast Ethernet interface (MII port and		4	To transceiver, repeater, or DTE
	RJ-45 port)
2	MII connector		5	To repeater or DTE
3	RJ-45 connector

Caution Before connecting the transceiver to the MII port on the I/O controller, check the MII transceiver documentation (or with the transceiver manufacturer) to ensure that the transceiver responds to physical sublayer (PHY) address 0; otherwise, anomalies with the MII connection on the I/O controller might occur. (PHY address 0 is defined in section 22.2.4.4 “PHY Address” of the IEEE 802.3u specification.) If you are unable to determine whether the transceiver responds to physical sublayer (PHY) address 0, we recommend using the transceiver’s “Isolation Mode” setting, if present.

Note To determine if an MII transceiver that is already connected to the MII port on the I/O controller responds to PHY address 0, ensure that the I/O controller Fast Ethernet port is configured as up and the MII port is configured as the media type, and then disconnect the transceiver from the MII port. If the Fast Ethernet port goes down, the transceiver responds to PHY address 0.

The type of media you use between the MII connection and your router, switch, or hub determines the appropriate connectors for the network side of your 100BASET transceiver.

Figure 3-27shows the pin orientation of the MII port on the I/O controller.

Cisco 7200 VXR Installation and Configuration Guide

OL-5013-09 3-33