Creating And Entering Subinterfaces - Cisco 10000 Series Configuration Manual

ATM Commands

Creating and Entering Subinterfaces

Use the interface command to segment an OC-3 ATM main interface into multiple subinterfaces to
simplify line card management, to create interfaces with different MTU sizes, and to create connections
to different networks.
interface atm slot/subslot/port.subinterface type
no interface atm slot/subslot/port.subinterface type
Where:
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To enter the subinterface at a later time, you do not need to specify the type.
To remove a subinterface and its PVCs, use the no interface command. To change a subinterface type,
you must first remove the subinterface.
Examples:
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Cisco 10000 Series Router Line Card Configuaration Guide
1-8
slot is 1 to 5 for a Cisco 10005 router
slot is 1 to 8 for a Cisco 10008 router
subslot is always 0 for a full-height line card
port is 0 to 3
subinterface is a value from 1 to 4294967295
type is always point-to-point or multipoint
Create subinterface number 1 at port 3 for 4-Port OC-3/STM-1 ATM line card in slot 1.
Router(config)# interface atm 1/0/3.1 point-to-point
Router(config-subif)#
Enter an existing subinterface.
Router(config)# interface atm 1/0/3.1
Router(config-subif)#
Use a multipoint subinterface.
If you want multiple PVCs to go to the same network, you must create a multipoint subinterface.
For example:
Router(config)# interface atm 4/0/2.2 multipoint
Router(config-subif)#
After you create the subinterface, you can create PVCs that are attached to the same network.
Figure 1-1 shows a multipoint subinterface on a fully meshed network. Fully meshed indicates that
any workstation can communicate with any other workstation.
Chapter 1 4-Port OC-3/STM-1 ATM Line Card Configuration
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