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Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
OL-1957-04
Chapter3 Configuring with the Command-Line Interface
Configuring Inverse Multiplexing for ATM Interfaces
Command Purpose
Step1
Router> enable
Password: password
Router#
Enter enable mode. Enter the password.
You have entered enable mode when the prompt
changes to Router#.
Step2
Router# configure terminal
Enter configuration commands, one per line.
End with CNTL/Z.
Router(config)#
Enter global configuration mode. You have
entered global configuration mode when the
prompt changes to Router(config)#.
Step3
Router# ip routing
Router# appletalk routing
Router# ipx routing
Enable routing protocols as required for your
global configuration. This example uses IP
routing, AppleTalk routing, and Internetwork
Packet Exchange (IPX) routing.
Step4
Router(config)# interface atm 1/0
Router(config-if)#
Enter interface configuration mode. You have
entered interface configuration mode when the
prompt changes to Router(config-if)#.
Step5
Router(config-if)# ima-group 2
Assign the ATM interface to an IMA group
(numbered from 0 to 3). The interface is now
assigned to a group and ATM functionality is no
longer available for the individual link.
Step6
Router(config-if)# no shutdown
Enable the individual link by canceling the
shutdown state.
Note The no shutdown command at this point
activates the individual ATM link. If this
command is omitted, the ATM link is
added to the group but is “inhibited” at the
IMA protocol level. This would prevent it
from carrying network traffic.
Repeat Step 4 through Step 6 if your router has
more than one interface that you need to
configure.
Step7
Router(config-if)# interface atm2/ima3
Create the IMA group interface.
Note The group interface is deleted with the no
interface atm 2/ima 3 command.
Step8
Router(config-if)# ima clock-mode common
Select the transmit clock mode for the selected
IMA group. The choices are common or
independent.
Step9
Router(config-if)# ima
differential-delay-maximum 75
Enter the maximum differential delay in
milliseconds for the selected IMA group.
Step10
Router(config-if)# ima active-links-minimum
2
Enter the minimum number of links that need to be
operational for the selected IMA group.
Step11
Router(config-if)# ima test link 4
Select the test port for the selected IMA group.
The link number is one of the physcial ports on the
network module.
Step12
Router(config-if)# ip address 192.168.74.3
255.255.255.0
Assign an IP address and subnet mask to the
interface.
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