Fast Ethernet Mii Connections - Cisco 7206VXR - VPN Bundle Router Configuration Manual

Chapter 3 Installing a Cisco 7200 VXR Router

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
1
2
3
Before connecting the transceiver to the MII port on the I/O controller, check the MII transceiver
Caution
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.
To determine if an MII transceiver that is already connected to the MII port on the I/O controller
Note
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 3-27
OL-5013-09
Fast Ethernet Port Connection
2
Optional Fast Ethernet interface (MII port and
RJ-45 port)
MII connector
RJ-45 connector
shows the pin orientation of the MII port on the I/O controller.
Connecting I/O Controller, NPE-G1, or NPE-G2 Cables
1
FAST ETHERNET INPUT/OUTP UT CONTROLLE R
3
4 5
4 To transceiver, repeater, or DTE
5 To repeater or DTE
Cisco 7200 VXR Installation and Configuration Guide
Figure 3-26.)
3-33