Fast Ethernet MII Connections

Chapter 3 Installing a Cisco 7200 VXR Router

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

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

SLOT	1		MII
		FE

ENABLED

PCMCIA

EJECT

SLOT

		T
		SE
-45	PU	RE
-45	PU
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

7200 VXR specifications

The Cisco Systems 7200 VXR Series is a robust and highly scalable modular router designed to meet the demands of service providers and enterprises seeking high-performance solutions for their network infrastructures. Launched as part of the Cisco 7200 series, the VXR (Virtual Extensible Routing) variant enhances capabilities while providing effective support for a wide range of applications, including Internet Protocol (IP) routing, Voice over IP (VoIP), and Virtual Private Network (VPN) configurations.

At the core of the 7200 VXR is its modular design, which enables network administrators to customize the router according to their specific needs. The router supports a variety of interface cards, processing engines, and power supply options, ensuring flexibility for diverse network environments. This modularity facilitates easy upgrades and expansions, making it ideal for growing enterprises and service providers looking to future-proof their networks.

One of the standout features of the Cisco 7200 VXR is its impressive routing performance. It can handle a high level of traffic with low latency, which is critical for bandwidth-intensive applications. The router supports a wide array of routing protocols, including Border Gateway Protocol (BGP), Open Shortest Path First (OSPF), and Integrated Intermediate System-to-Intermediate System (IS-IS), providing versatility for various network topologies.

The 7200 VXR also incorporates advanced features for enhanced security and reliability. With support for IPsec VPNs, it enables secure data transmission across untrusted networks. The router also includes features like Quality of Service (QoS) for prioritizing network traffic, ensuring critical applications receive the bandwidth they require even during peak loads.

In terms of scalability, the Cisco 7200 VXR can support hundreds of thousands of routes and MAC addresses, making it suitable for large metropolitan area networks (MANs) as well as enterprise backbone applications. It also provides the capability to support IPv4 and IPv6 networks, preparing organizations for a transition to next-generation internet protocols.

Additional characteristics of the Cisco 7200 VXR include enhanced manageability through the Cisco IOS software, which offers a comprehensive command-line interface and support for network management protocols. The router is also energy-efficient, with options for redundant power supplies that ensure continuous availability and minimal downtime in mission-critical applications.

Overall, the Cisco Systems 7200 VXR represents a powerful solution that combines performance, scalability, and security, making it an excellent choice for organizations looking to enhance their network capabilities in a rapidly evolving technological landscape.

Cisco Systems 7200 VXR manual Fast Ethernet MII Connections, Fast Ethernet Port Connection

Models: 7200 VXR