Cisco PA-T3 Installation And Configuration Manual page 47

The I/O controller is available with or without a Fast Ethernet port. You can install both I/O
Note
controller types in all Cisco 7200 series routers; however, when you install an I/O controller with a
Fast Ethernet port in a Cisco 7202, the system software automatically disables the port.
For example, the serial port on a one-port PA-T3 serial port adapter in port adapter slot 3 has the
address 3/0. (See Figure 8-1.) If the PA-T3 serial port adapter is in port adapter slot 1, this same
interface port is numbered 1/0. The serial ports on a two-port PA-2T3 serial port adapter in port
adapter slot 3 has the address 3/0 and 3/1.
Note The PA-T3 serial port adapter is considered a high-bandwidth port adapter; you must observe
specific configuration guidelines. Refer to the publication Cisco 7200 Series Port Adapter Hardware
Configuration Guidelines, which shipped with your Cisco 7200 series chassis and is also available
on the Cisco Connection Documentation, Enterprise Series CD-ROM.
Figure 8-1 Serial Port Number Example—Cisco 7206
PA-T3 port adapter
(port number 3/0)
Figure 8-2 shows the interface ports of a PA-T3 port adapter in slot 2 of a Cisco uBR7200 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). The individual interface port numbers always begin with 0. The number of additional ports
depends on the number of ports on a port adapter. Port adapters can occupy any port adapter slot;
there are no restrictions.
For example, the serial port on a one-port PA-T3 serial port adapter in port adapter slot 1 has the
address 1/0. (See Figure 8-2.) If the PA-T3 serial port adapter is in port adapter slot 2, this same
interface port is numbered 2/0. The serial ports on a two-port PA-2T3 serial port adapter in
port adapter slot 2 have the address 2/0 and 2/1.
Cisco 7200 Series and Cisco uBR7200 Series Ports
1DS3 SERIAL
FAST ETHERNET INPUT/OUTPUT CONTROLLER
Configuring the PA-T3 Interfaces 8-3
TOKEN RING
ETHERNET-10BFL