|
|
This chapter describes the PA-FE-TX and PA-FE-FX port adapter and contains the following sections:
The PA-FE-TX and PA-FE-FX port adapters provide a 100-Mbps, 100BaseT Fast Ethernet interface and support both full-duplex and half-duplex operation. Refer to "Fast Ethernet Overview" section for additional information. Figure 1-1 shows the PA-FE-TX, and Figure 1-2 shows the PA-FE-FX.
 |
Note While the Catalyst RSM/VIP2 supports online insertion and removal (OIR), individual port adapters do not. To replace port adapters, you must first remove the Catalyst RSM/VIP2 from the chassis, and then replace port adapters as required. Cisco 7100 series routers, Cisco 7200 series routers, and Cisco uBR7200 series universal broadband routers support online insertion and removal (OIR) of port adapters. |
The term Ethernet is commonly used for all carrier sense multiple access/collision detect (CSMA/CD) LANs that generally conform to Ethernet specifications, including Fast Ethernet under IEEE 802.3u.
|
Note 100BaseTX is intended for Environment A, and 100BaseFX is intended for Environment B. |
IEEE 802.3u is well suited to applications where a local communication medium must carry sporadic, occasionally heavy traffic at high peak data rates. Workstations on a CSMA/CD LAN can access the network at any time. Before sending data, the station listens to the network to see if it is already in use. If it is, the station waits until the network is not in use, then transmits; this is half-duplex operation. A collision occurs when two stations listen for network traffic, hear none, and transmit almost simultaneously. When this happens, both transmissions are damaged, and the stations must retransmit. The stations detect the collision and use backoff algorithms to determine when they should retransmit.
Both Ethernet and IEEE 802.3u are broadcast networks, which means that all stations see all transmissions. Each station must examine received frames to determine whether it is the intended destination and, if it is, pass the frame to a higher protocol layer for processing.
IEEE 802.3u specifies the following different physical layers for 100BaseT:
Each physical layer protocol has a name that summarizes its characteristics in the format speed/signaling method/segment length, where speed is the LAN speed in Mbps, signaling method is either baseband or broadband, and segment length is typically the maximum length between stations in hundreds of meters. Therefore, 100BaseT specifies a 100-Mbps, baseband LAN with maximum network segments.
Table 1-1 lists the cabling specifications for 100-Mbps Fast Ethernet transmission over UTP, FTP, and fiber-optic cables. Table 1-2 summarizes IEEE 802.3u 100BaseT physical characteristics.
| Parameter | RJ-45 | MII | SC-Type |
|---|---|---|---|
Cable specification | Category 3, 4, or 5, 150-ohm UTP or FTP, or multimode optical fiber | 62.5/125 multimode optical fiber | |
Maximum cable length | - | 1.64 ft (0.5 m) (MII-to-MII cable3) | - |
Maximum segment length | 328 ft (100 m) for 100BaseTX | 3.28 ft (1 m)4 or 1,312 ft (400 m) for 100BaseFX | 328 ft (100 m) |
Maximum network length | 656 ft (200 m)4 (with 1 repeater) | - | 656 ft (200 m)4 (with 1 repeater) |
| 1EIA/TIA-568 or EIA-TIA-568 TSB-36 compliant. 2Cisco Systems does not supply Category 5 UTP RJ-45 or 150-ohm FTP MII cables. Both are available commercially. 3This is the cable between the MII port on the PA-FE port adapter and the appropriate transceiver. 4This length is specifically between any two stations on a repeated segment. |
| Parameter | 100BaseFX | 100BaseTX |
|---|---|---|
Data rate (Mbps) | 100 | 100 |
Signaling method | Baseband | Baseband |
Maximum segment length (meters) | 100 m between repeaters | 100 m between DTE1 and repeaters |
SC-type: dual simplex or single duplex for Rx and Tx | RJ-45MII | |
Topology | Star or hub | Star or hub |
| 1DTE = data terminal equipment. |
The PA-FE-TX and the PA-FE-FX have an enabled LED, standard on all port adapters, and a bank of three status LEDs for the ports. After system initialization, the enabled LED lights to indicate that the PA-FE-TX or PA-FE-FX has been enabled for operation. (See Figure 1-3.)
Table 1-3 lists port LED colors and indications.
| LED Label | Color | State | Meaning |
ENABLED | Green | On | The PA-FE-TX or PA-FE-FX is correctly connected and receiving power, it contains a valid microcode version, and the bus recognizes the PA-FE-TX or PA-FE-FX port adapter or the PA-FE-equipped VIP or Catalyst RSM/VIP2. |
MII | Green | On | This LED is illuminated when the MII port is selected as the active port by the controller. |
LINK | Green | On | This LED is illuminated when the RJ-45 or fiber port is active and receiving a carrier signal from the network. |
LINK | Green | On | This LED flickers on and off proportionately when the MII port is active and indicates network activity. |
RJ45 (or FIBER on FE-FX) | Green | On | This LED is illuminated when the RJ-45 (or fiber) port is selected as the active port by the controller. |
Either the MII LED or the RJ-45 (or fiber) LED should be on at any one time; never both.
Each Fast Ethernet port on the PA-FE-TX has an RJ-45 connector to attach to Category 5 unshielded twisted-pair (UTP) for 100BaseTX, and a MII connector that permits connection through external transceivers to multimode fiber for 100BaseFX, or to Category 3, 4, and 5 UTP or foil twisted-pair (FTP) for 100BaseT4 physical media. Only one connector can be used at one time. The RJ-45 connection does not require an external transceiver. The MII connection (a 40-pin, D-shell type connector) requires an external physical sublayer (PHY) and an external transceiver.
Each Fast Ethernet port on the PA-FE-FX port adapter has an SC-type fiber-optic connector for 100BaseFX, and an MII connector that permits connection through external transceivers to multimode fiber for 100BaseFX, or to Category 3, 4, and 5 UTP or STP for 100BaseT4 physical media. Only one connector can be used at one time. The MII connection (a 40-pin, D-shell type connector) requires an external physical sublayer (PHY) and an external transceiver.
Figure 1-4 shows the RJ-45 cable connectors. Cisco Systems does not supply Category 5 UTP RJ-45 cables; these cables are available commercially. Table 1-4 lists the pinouts for the PA-FE-TX RJ-45 connectors.
 |
Warning The ports labeled "Ethernet," "10BaseT," "Token Ring," "Console," and "AUX" are safety extra-low voltage (SELV) circuits. SELV circuits should only be connected to other SELV circuits. Because the BRI circuits are treated like telephone-network voltage, avoid connecting the SELV circuit to the telephone network voltage (TNV) circuits. |
| Pin | Description |
|---|---|
1 | Transmit data + (TxD+) |
2 | TxD- |
3 | Receive data + (RxD+) |
6 | RxD- |
Depending on your RJ-45 interface cabling requirements, use the pinouts in Figure 1-5 and Figure 1-6.
Figure 1-7 shows the duplex SC connector (one required for both transmit and receive), and Figure 1-8 shows the simplex SC connector (two required, one for each transmit and receive) used for PA-FE-FX optical-fiber connections. These multimode optical-fiber cables are commercially available and are not available from Cisco Systems.
Depending on the type of media you use between the MII connection on the port adapter and your switch or hub, the network side of your 100BaseT transceiver should be appropriately equipped with ST-type connectors (for optical fiber), BNC connectors, and so forth. Figure 1-9 shows the pin orientation of the female MII connector on the port adapter. The port adapters are field-replaceable units (FRUs).
The MII receptacle uses two 56 screw-type locks, called jackscrews (shown in Figure 1-9), to secure the cable or transceiver to the MII port. MII cables and transceivers have knurled thumbscrews that you fasten to the jackscrews on the PA-FE-TX's MII connector. Use the jackscrews to provide strain relief for your MII cable.
 |
Caution Before you attach your MII transceiver to the MII receptacle on your PA-FE-TX or PA-FE-FX port adapter, ensure that your MII transceiver responds to physical sublayer (PHY) address 0 per section 22.2.4.4. "PHY Address" of the IEEE 802.3u specification; otherwise, interface problems might result. Confirm that this capability is available on your MII transceiver with the transceiver vendor or in the transceiver documentation. If a selection for isolation mode is available, we recommend you use this setting (if PHY addressing is not mentioned). |
Table 1-5 lists the MII connector pinouts. MII cables are available commercially and are not available from Cisco Systems. Table 1-5 refers to MII cables used between the MII connector on the PA-FE-TX and an appropriate transceiver. The connection between this transceiver and your network can be Category 3, 4, or 5, 150-ohm UTP or FTP, or multimode optical fiber.
| Pin1 | In | Out | In/Out | Description |
|---|---|---|---|---|
14-17 | - | Yes | - | Transmit Data (TxD) |
12 | Yes | - | - | Transmit Clock (Tx_CLK)2 |
11 | - | Yes | - | Transmit Error (Tx_ER) |
13 | - | Yes | - | Transmit Enable (Tx_EN) |
3 | - | Yes | - | MII Data Clock (MDC) |
4-7 | Yes | - | - | Receive Data (RxD) |
9 | Yes | - | - | Receive Clock (Rx_CLK) |
10 | Yes | - | - | Receive Error (Rx_ER) |
8 | Yes | - | - | Receive Data Valid (Rx_DV) |
18 | Yes | - | - | Collision (COL) |
19 | Yes | - | - | Carrier Sense (CRS) |
2 | - | - | Yes | MII Data Input/Output (MDIO) |
22-39 | - | - | - | Common (ground) |
1, 20, 21, 40 | - | - | - | +5.0 volts (V) |
| 1Any pins not indicated are not used. 2Tx_CLK and Rx_CLK are generated by the external transceiver. |
This section discusses port adapter slot locations on the supported platforms. The illustrations that follow summarize slot location conventions on each platform.
The Catalyst RSM/VIP2 can be installed in any slot except the top slots, which contain the supervisor engine modules. The Catalyst RSM/VIP2 in a Catalyst 5000 family switch does not use interface processor slot numbering; therefore, slots are not numbered in Figure 1-10. The PA-FE-FX and PA-FE-TX can be installed into either port adapter slot 0 or 1 on a Catalyst RSM/VIP2. Figure 1-10 shows a Catalyst RSM/VIP2 with two port adapters installed.
|
Note The Catalyst 5500 switch has 13 slots. Slot 1 is reserved for the supervisor engine module. If a redundant supervisor engine module is used, it would go in slot 2; otherwise, slot 2 can be used for other modules. Slot 13 is a dedicated slot, reserved for the ATM Switch Processor (ASP) module. Refer to the Catalyst 5000 Series Route Switch Module Installation and Configuration Note for any additional slot restrictions for the Catalyst RSM/VIP2. |
The PA-FE-TX and PA-FE-FX can be installed in port adapter slot 3 in Cisco 7120 series routers, and in port adapter slot 4 in Cisco 7140 series routers. Figure 1-11 shows a Cisco 7120 with a port adapter installed in slot 3. Figure 1-12 shows a Cisco 7140 with a port adapter installed in slot 4.
Figure 1-13 shows a Cisco 7206 with port adapters installed. In the Cisco 7206 (including the Cisco 7206 and Cisco 7206VXR as router shelves in a Cisco AS5800 Universal Access Server), port adapter slot 1 is in the lower left position, and port adapter slot 6 is in the upper right position. (The Cisco 7202 and Cisco 7204 are not shown; however, the PA-FE-TX and PA-FE-FX can be installed in any available port adapter slot.)
Figure 1-14 shows the slot numbering of port adapters in a Cisco uBR7246 series router. The port adapter slots are numbered slot 1 and slot 2 for the Cisco uBR7246 and slot 1 for the Cisco uBR7223. (Slot 0 is always reserved for the Fast Ethernet port on the I/O controller---if present.)
Figure 1-15 shows a VIP motherboard with installed port adapters. With the motherboard oriented as shown in Figure 1-15, the left port adapter is in port adapter slot 0, and the right port adapter is in port adapter slot 1. The slot numbering is the same for the Catalyst RSM/VIP2. The slots are always numbered 0 and 1.
|
Note In the Cisco 7000, Cisco 7507, and Cisco 7513 chassis, the VIP motherboard is installed vertically. In the Cisco 7010 and Cisco 7505 chassis, the VIP motherboard is installed horizontally. |
Interface processor slots are numbered as shown in Figure 1-17.
This section describes how to identify interface addresses for the PA-FE-TX and PA-FE-FX in supported platforms. Interface addresses specify the actual physical location of each interface on a router or switch.
Interfaces on the PA-FE-TX and PA-FE-FX installed in a router maintain the same address regardless of whether other port adapters are installed or removed. However, when you move a port adapter to a different slot, the first number in the interface address changes to reflect the new port adapter slot number.
Interfaces on a PA-FE-TX and PA-FE-FX installed in a VIP maintain the same address regardless of whether other interface processors are installed or removed. However, when you move a VIP to a different slot, the interface processor slot number changes to reflect the new interface processor slot.
Table 1-6 explains how to identify interface addresses.
| Platform | Interface Address Format | Numbers | Syntax |
|---|---|---|---|
Catalyst RSM/VIP2 in | Port-adapter-slot-number/interface-port-number | Port adapter slot---always 0 or 1 Interface port---0 | 0/0 |
Cisco 7120 series routers | Port-adapter-slot-number/interface-port-number | Port adapter slot---always 3 Interface port---0 | 3/0 |
Cisco 7140 series routers | Port-adapter-slot-number/interface-port-number | Port adapter slot---always 4 Interface port---0 | 4/0 |
Cisco 7200 series routers | Port-adapter-slot-number/interface-port-number | Port adapter slot---0 through 6 (depends on the number of slots in the router)1 Interface port---0 | 1/0 |
Cisco uBR7223 router | Port-adapter-slot-number/interface-port-number | Port adapter slot---always 11 Interface port---0 through 1 | 1/0 |
Cisco uBR7246 router | Port-adapter-slot-number/interface-port-number | Port adapter slot---always 1 or 21 Interface port---0 through 1 | 1/0 |
VIP2 or VIP4 in Cisco 7000 series or | Interface-processor-slot-number/port-adapter-slot- | Interface processor slot---0 through 12 (depends on the number of slots in the router) Port adapter slot---always 0 or 1 Interface port---0 | 3/1/0 |
| 1Port adapter slot 0 is reserved for the Fast Ethernet port on the I/O controller (if present). |
This section describes how to identify the interface addresses used for the PA-FE-TX or PA-FE-FX on the Catalyst RSM/VIP2 in Catalyst 5000 family switches. The interface address is composed of a two-part number in the format port-adapter-slot-number/interface-port-number.
See Table 1-6 for the interface address format.
This section describes how to identify the interface addresses used for the PA-FE-TX or PA-FE-FX in Cisco 7100 series routers. The interface address is composed of a two-part number in the format port-adapter-slot-number/interface-port-number. See Table 1-6 for the interface address format.
This section describes how to identify the interface addresses used for the PA-FE-TX and PA-FE-FX in Cisco 7200 series routers or Cisco uBR7200 series routers. The interface address is composed of a two-part number in the format port-adapter-slot-number/interface-port-number. See Table 1-6 for the interface address format.
In Cisco 7200 series routers, port adapter slots are numbered from the lower left to the upper right, beginning with port adapter slot 1 and continuing through port adapter slot 2 for the Cisco 7202, slot 4 for the Cisco 7204 and Cisco 7204VXR, and slot 6 for the Cisco 7206 and Cisco 7206VXR. (Port adapter slot 0 is reserved for the optional Fast Ethernet port on the I/O controller---if present.) Figure 1-13 shows the interfaces of a PA-FE-TX or PA-FE-FX port adapter in port adapter slot 1 of the Cisco 7206 router.
The interface addresses of the interfaces on the PA-FE-TX or PA-FE-FX in port adapter slot 1 are
1/0 through 1/1 (port adapter slot 1 and interfaces 0 through 1). If the PA-FE-TX or PA-FE-FX was in port adapter slot 4, these same interfaces would be numbered 4/0 through 4/1 (port adapter slot 4 and interface 0).
Figure 1-14 shows port adapters installed in slot 1 and slot 2 of the Cisco uBR7246 router. The port adapter slots are numbered slot 1 and slot 2 for the Cisco uBR7246 and slot 1 for the Cisco uBR7223. (Slot 0 is always reserved for the Fast Ethernet port on the I/O controller---if present.) The individual interfaces always begin with 0. The number of additional interfaces depends on the number of interface ports on a port adapter.
The interface addresses of the interfaces on a PA-FE-TX or PA-FE-FX in port adapter slot 2 are 2/0 and 2/1 (port adapter slot 2 and interfaces 0 and 1). If the PA-FE-TX and PA-FE-FX was in port adapter slot 1, these same interfaces would be numbered 1/0 and 1/1 (port adapter slot 1 and interfaces 0 and 1).
This section describes how to identify the interface addresses used for the PA-FE-TX and PA-FE-FX on a VIP in Cisco 7000 series and Cisco 7500 series routers.
|
Note Although the processor slots in the 7-slot Cisco 7000 and Cisco 7507 and 13-slot Cisco 7513 and Cisco 7576 are vertically oriented and those in the 5-slot Cisco 7010 and Cisco 7505 are horizontally oriented, all Cisco 7000 series and Cisco 7500 series routers use the same method for slot and port numbering. |
See Table 1-6 for the interface address format. The interface address is composed of a three-part number in the format interface-processor-slot number/port-adapter-slot-number/interface-port- number.
Figure 1-17 shows a sample Cisco 7505 system. The interface address of the PA-FE-TX or PA-FE-FX is 3/1/0 (interface processor slot 3, port adapter slot 1, and interface 0). If the port adapter was in port adapter slot 0 on the VIP, this same interface address would be numbered 3/0/0.
|
Note If you remove the VIP2 with the PA-FE-TX and PA-FE-FX (see Figure 1-17) from interface processor slot 3 and install it in interface processor slot 2, the interface address becomes 2/1/0. |
Posted: Fri Apr 28 08:44:49 PDT 2000
Copyright 1989 - 2000©Cisco Systems Inc.