3-22
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
Configuring Inverse Multiplexing for ATM Interfaces
To configure an inverse multiplexing for ATM (IMA) interface, you must use configuration mode
(manual configuration). In this mode, you enter CiscoIOS commands at the router prompt.
Note Before you begin, disconnect all WAN cables from the router to keep it from trying to run the AutoInstall
process. The router tries to run AutoInstall whenever you power it on, if there is a WAN connection on
both ends and the router does not have a valid configuration file stored in nonvolatile random-access
memory (NVRAM) (for instance, when you add a new interface). It can take several minutes for the
router to determine that AutoInstall is not connected to a remote Transmission Control Protocol/Internet
Protocol (TCP/IP) host.
This section describes basic configuration, including enabling the interface and specifying IP routing.
Depending on your own requirements and the protocols you plan to route, you might also need to enter
other configuration commands.
Note The T1/E1 physical layer information is configured underneath an interface called interface atm.
The ATM interfaces (representing the individual T1/E1 interfaces) are automatically created depending
on the configuration of the individual T1/E1 interfaces. You cannot directly add or delete these
interfaces.
Each port can be used as an independent T1/E1 ATM port with all the properties and functionality of
ATM interfaces. When the port becomes part of an IMA group, its ATM functionality ceases. At the
same time, the IMA group can use ATM commands.
Step10
Router(config-if)# appletalk static
cable-range 3-3
Router(config-if)# appletalk zone ZZEth
Router(config-if)# ipx network B005
Configure routing protocols on the interface. You
must have previously enabled these protocols as
part of global configuration. In this example,
AppleTalk and IPX are being configured on the
interface.
Step11
Router(config-if)# svc nsap
BC.CDEF.01.234567.890A.BCDE.F012.3456.7890
.
1234.12
Configure the signaling PVC and the ATM
network service access point (NSAP) address. The
signaling PVC command has the format svc
[name] nasp <20-byte address>. You have
entered interface-ATM-VC configuration mode
when the prompt changes to
Router(config-if-atm-vc).
Step12
Router(config-if-atm-vc)# protocol ip
200.200.200.2 broadcast
Map the PVC to an address.
Step13
Router(config-if-atm-vc)# exit
Exit back to global configuration mode.
Repeat Step 4 through Step 12 if your router has
more than one interface that you need to
configure.
Step14
Router(config)# Ctrl-z
When you finish configuring interfaces, return to
enable mode.
Command Purpose
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