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This chapter describes the PA-T3 port adapter and contains the following sections:
The PA-T3 serial port adapter is a single-width, one-port or two-port module that integrates data service unit (DSU) functionality into the Cisco router. It provides one or two high-speed serial PA-T3 interfaces on Cisco 7100 series routers, Cisco 7200 series routers, Cisco uBR7200 series routers, on the second- or fourth-generation Versatile Interface Processor (VIP2 or VIP4) in all Cisco 7000 series and Cisco 7500 series routers, and on the Catalyst RSM/VIP2 in the Catalyst 5000 series switches. (See Figure 1-1 and Figure 1-2.)
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Note Although the VIP and Catalyst RSM/VIP2 support online insertion and removal (OIR), individual port adapters do not. To replace port adapters, you must first remove the VIP or Catalyst RSM/VIP2 from the chassis, and then replace port adapters as required. Cisco 7100 series, Cisco 7200 series, and Cisco uBR7200 series routers support OIR of all port adapter types. |
---Front View
The one-port PA-T3 serial port adapter provides two network interfaces per VIP2 or VIP4 for Cisco 7000 series and Cisco 7500 series routers, two network interfaces per Catalyst RSM/VIP2, and one high-speed interface on the Cisco 7200 series and Cisco uBR7200 series routers. The two-port PA-2T3 serial port adapter provides four network interfaces per VIP for Cisco 7000 series and Cisco 7500 series routers, four network interfaces for the Catalyst RSM/VIP2, and two high-speed interfaces on the Cisco 7200 series and Cisco uBR7200 series routers. Serial network interfaces reside on modular port adapters, which provide a direct connection between the high-speed bus in the router and the external networks. The PA-T3 serial port adapter provides a full-duplex synchronous serial PA-T3 interface for transmitting and receiving data at rates of up to 34 megabits per second (Mbps).
The port adapter supports both 16- and 32-bit cyclic redundancy checks (CRCs). The default is 16-bit CRCs. To enable 32-bit CRCs, use a configuration command. For a description of the CRC function, see the "Configuring Cyclic Redundancy Checks" section.
The VIP2, VIP4, and Catalyst RSM/VIP2 support online insertion and removal (OIR), but individual port adapters with a VIP or Catalyst RSM/VIP2 do not support OIR. To replace port adapters in the Cisco 7000 series and Cisco 7500 series routers, and the Catalyst 5000 series switches, you must first remove the VIP or Catalyst RSM/VIP2 from the chassis, and then replace port adapters as required. OIR is supported for port adapters in the Cisco 7200 series and Cisco uBR7200 series routers.
The PA-T3 serial port adapter has the following features:
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Note Switched Multimegabit Data Service (SMDS) is supported when a switch that supports DXI3.2 is used at the Subscriber Network Interface (SNI). |
The PA-T3 has one status LED and six uplink port status LEDs (RCLK, FERF, OOF, AIS, RL, and LL) for the serial T3 port. (See Figure 1-3.)
The PA-2T3 has one status LED and six uplink port status LEDs (RCLK, FERF, OOF, AIS, RL, and LL) for each serial T3 port. (See Figure 1-4.)
Table 1-1 describes the PA-T3 LEDs.
After system initialization, the enabled LED goes on, indicating that the port adapter has been enabled for operation.
The following conditions must be met before the PA-T3 serial port adapter is enabled:
If any of these conditions is not met or if the initialization fails for other reasons, the enabled LED does not go on.
| LED | Color | State | Description |
|---|---|---|---|
ENABLED | Green | On | Indicates that port adapter is ready for operation. |
| Uplink Port Status | |||
RCLK | Green | On | Indicates that a receive clock has been detected. |
FERF | Yellow | On | Indicates that framer detected far end receive failure. |
OOF | Yellow | On | Indicates that framer detected out of frame. |
AIS | Yellow | On | Indicates that framer detected alarm indication signal. |
RL | Yellow | On | Indicates that port is in remote loopback mode. |
LL | Yellow | On | Indicates that port is in local loopback mode. |
The PA-T3 port adapter serial interface cable, which is a 75-ohm coaxial cable, connects your router to a T3 serial network. Serial cables conform to EIA/TIA-612 and EIA/TIA-613 specifications. The PA-T3 is a DSX-3 level interface. The serial ports on the PA-T3 serial port adapter are considered to be data terminal equipment (DTE) devices.
On a single PA-T3 serial port adapter, there are one or two T3 serial ports, each with two connectors (receive and transmit), to which you connect the Cisco 75-ohm coaxial cable. The 75-ohm coaxial cable (Cisco part number CAB-ATM-DS3/E3[=]) for the PA-T3 serial port adapter is available only from Cisco Systems; it is not available from outside commercial cable vendors.
The Cisco PA-T3 75-ohm coaxial cable (see Figure 1-5) is available only in 10-foot (3.05-meter) lengths. Line build-out is programmable for up to 450 feet of 734A or equivalent coaxial cable or up to 225 for 728A or equivalent coaxial cable.
You can test the data terminal equipment-to-data circuit-terminating equipment (DTE-to-DCE) cable connection by using the loopback dte command. See the "Using the loopback Command to Verify the Physical Interface" section for more information.
Management Information Base (MIB) attributes are readable and writable across the ILMI through use of the SNMP.
The one-port PA-T3 serial port adapter supports MIB-II (RFC 1213) and the DS3 interface MIB (RFC 1407).
The two-port PA-2T3 serial port adapter supports MIB-II (RFC 1213) and the DS3 interface MIB (RFC 1407).
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 1-6. The PA-T3 can be installed into either port adapter slot 0 or slot 1 on a Catalyst RSM/VIP2. Figure 1-6 shows a Catalyst RSM/VIP2 with two port adapters installed.
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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-T3 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 1-7 shows a Cisco 7120 with a port adapter installed in slot 3. Figure 1-8 shows a Cisco 7140 with a port adapter installed in slot 4.
---Cisco 7140 Series
Figure 1-9 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-T3 can be installed in any available port adapter slot.)
Figure 1-10 shows the slot numbering of port adapters in a Cisco uBR7246 and Cisco uBR7246VXR router. The port adapter slots are numbered slot 1 and slot 2 for the Cisco uBR7246 and Cisco uBR7246VXR router and slot 1 for the Cisco uBR7223. (Slot 0 is always reserved for the Fast Ethernet port on the I/O controller---if present.)
uBR7246VXR
Figure 1-11 shows a partial view of a VIP motherboard with installed port adapters. With the motherboard oriented as shown in Figure 1-11, 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.
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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 1-12.
This section describes how to identify interface addresses for the PA-T3 in supported platforms. Interface addresses specify the actual physical location of each interface on a router or switch.
Interfaces on the PA-T3 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-T3 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 1-2 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 (PA-T3) or 0 through 2 (PA-2T3) | 0/1 |
Cisco 7120 series routers | Port-adapter-slot-number/interface-port-number | Port adapter slot---always 3 Interface port---0 (PA-T3) or 0 through 2 (PA-2T3) | 3/1 |
Cisco 7140 series routers | Port-adapter-slot-number/interface-port-number | Port adapter slot---always 4 Interface port---0 (PA-T3) or 0 through 2 (PA-2T3) | 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 (PA-T3) or 0 through 2 (PA-2T3) | 1/0 |
Cisco uBR7223 router | Port-adapter-slot-number/interface-port-number | Port adapter slot---always 11 Interface port---0 (PA-T3) or 0 through 2 (PA-2T3) | 1/0 |
Cisco uBR7246 and Cisco uBR7246VXR rotuers | Port-adapter-slot-number/interface-port-number | Port adapter slot---always 1 or 21 Interface port---0 (PA-T3) or 0 through 2 (PA-2T3) | 1/2 |
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 (PA-T3) or 0 through 2 (PA-2T3) | 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-T3 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 1-2 for the interface address format.
This section describes how to identify the interface addresses used for the PA-T3 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 1-2 for the interface address format.
This section describes how to identify the interface addresses used for the PA-T3 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 1-2 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.)
The interface addresses of the interfaces on the PA-T3 in port adapter slot 1 are
1/0 through 1/7 (port adapter slot 1 and interfaces 0 through 7). If the PA-T3 was in port adapter slot 4, these same interfaces would be numbered 4/0 through 4/7 (port adapter slot 4 and interfaces
0 through 2).
In Cisco uBR7200 series routers, port adapter slots are numbered slot 1 and slot 2 for the Cisco uBR7246 and Cisco uBR7246VXR 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-T3 in port adapter slot 2 are 2/0 and 2/1 (port adapter slot 2 and interfaces 0 and 1). If the PA-T3 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-T3 on a VIP2 or VIP4 in Cisco 7000 series and Cisco 7500 series routers.
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Note Although the processor slots in the 7-slot Cisco 7000 and Cisco 7507 and the 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 1-2 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.
If the VIP is inserted in interface processor slot 3, then the interface addresses of the PA-2T3 are 3/1/0 through 3/1/2 (interface processor slot 3, port adapter slot 1, and interfaces 0 through 2). If the port adapter was in port adapter slot 0 on the VIP, these same interface addresses would be numbered 3/0/0 through 3/0/2.
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Note If you remove the VIP with the PA-2T3 (shown in Figure 1-12) from interface processor slot 3 and install it in interface processor slot 2, the interface addresses become 2/1/0 through 2/1/2. |
Posted: Fri Jul 21 07:41:33 PDT 2000
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