Multichannel STM-1 Port Adapter for the Cisco 7500 Series Router
Configuration Tasks
5
12.0(14)S
Configuring an AU-3
Each of the administrative unit group (AUGs) and tributary unit group (TUGs) of a PA-MC-STM-1 can
be configured to carry a set of E1 links that are mapped into TU-12s. To configure the AUG mapping to
AU-3, follow the steps below:
Step 4
Router(config-controller)#
clock source
{
internal
|
line
}
Configures the clock source used by the SONET
controller.
•
internal
—The clocking source is obtained
from the port adapter line.
•
line
—The clocking source is obtained from
the network.
Step 5
Router(config-controller)# [
no
]
loopback
{
local
|
network
}
Enables or disables loopback mode on a SONET
controller.
•
local
—Data is looped from the transmit path
to the receive path allowing diagnostics to
send data to itself without relying on any
external connections.
•
network
—Data is looped from the external
port to the transmit port and back out the
external port.
No loopback enabled is the default.
Step 6
Router(config-controller)# [
no
]
description
string
Specifies up to 80 characters of text describing the
SONET controller. No description is the default.
Command
Purpose
Command
Purpose
Step 1
Router(config)#
controller sonet
slot/port-adapter/port
Enters SONET controller configuration mode.
Step 2
Router(config-controller)#
framing sdh
Configures the framing mode of the to SDH.
Step 3
Router(config-controller)# [
no
]
aug mapping au-3
Maps the AUG to AU-3 with the following
muxing/alignment/mapping:
C-12 <-->VC-12 <--> TU-12<--> TUG-2
<--> VC-3 <--> AU-3 <--> AUG
Step 4
Router(config-controller)#
au-3
au-3-number
Specifies the AU-3 number to configure:.
•
au-3-number
—a number in the range of
1 to 3.
Step 5
Router(config-ctrlr-au3)#
mode c-12
Specifies the mode of operation of the AU-3.
•
c-12
—The AU-3 is divided into 21 TU-12s
each carrying an E1.
Step 6
Router(config-ctrlr-au3)#
idle pattern
pattern
Configures the idle pattern that is to be transmitted
for unused time slots on all E1 lines of a AU-3.
•
pattern
—number in the range 0x0 to 0xFF
(hexadecimal) or 0 to 225 (decimal).
