4-5
PA-MC-T3-EC Port Adapter Installation and Configuration
OL-10589-02
Chapter 4 Configuring the Unchannelized Mode
Configuring an Unchannelized T3 Link
•
Viewing the Results of a BER Test, page 4-12
•
Terminating a BER Test, page 4-14
Selecting a T3 Controller
You must enter the following controller command, before any other configuration commands, to select
the T3 controller you want to configure:
controller T3
chassis-slot/T3-port
The example that follows is for a port adapter in slot 1 of a Cisco 7200 VXR router:
Router#
configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
controller t3 1/0
Router(config-controller)#
Setting Unchannelized Mode for the T3 Controller
To configure the T3 for unchannelized mode,
use the
no channelized command.
After the full-rate T3
interface is configured, use the
dsu bandwidth
command to create a subrate T3 interface. The following
example configures a subrate T3 interface on a PA-MC-T3-EC in port adapter slot 1 of a
Cisco 7200 VXR router:
Router#
configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
controller t3 1/0
Router(config
-controller
)#
no channelized
Router(config-controller)#
exit
Router(config)#
interface serial 1/0
Router(config-if)#
dsu bandwidth 16000
Router(config-if)#
encapsulation frame-relay
Router(config-if)#
ip address 10.10.10.10 255.255.255.255
Router(config-if)#
no shutdown
When the PA-MC-T3-EC is configured for unchannelized T3 mode, its default MTU size is set to 4470
for compatibility with other T3 equipment and port adapters.
Setting the T3 port to unchannelized mode creates a serial interface that the following commands may
be used to configure. Use the
interface serial
command to select the serial interface.
Router#
configure terminal
Router#
interface serial 1/0/1
Router(config-if)#
Setting the Framing Type for the Serial Interface
In interface configuration mode, specify T3 framing by entering the
framing
{c-bit | m13}
configuration
command where:
•
c-bit
is—c-bit parity DS3 framing.
•
m13
is—M13 Multiplex DS3 framing.
Use the
no
form of this command to return to the default, c-bit framing.
