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PA-A2 ATM CES Configurations
Step 2
You can list the VPI and VCI values using the pvc ? command.
Router(config-if)#pvc ?
<0-255>
<1-65535>
WORD
Step 3
Create the PVC. Notice the output telling you that circuit has been configured on a specific interface.
Router(config-if)#pvc x/32
Configuring vc 1/1 on interface ATM5/0.200
Router(config-if-atm-vc)#
Note
Static map statements are not required for point-to-point subinterfaces.
Configuring a PVC on a Multipoint Subinterface
Multipoint networks generally have three or more routers in the same subnet. If you put the PVC in a
point-to-multipoint subinterface or in the main interface (which is multipoint by default), you need to
either configure a static mapping or enable inverse Address Resolution Protocol (InARP) for dynamic
mapping.
The following output example shows a PVC 2/200 on ATM interface 1/1/0.200. It uses the global default
AAL5SNAP encapsulation. The local interface IP address is 2.2.2.1, and the remote interface IP address
is 2.2.2.2.
Router# show interfaces atm 1/1/0.200
interface ATM1/1/0.200 multipoint
ip address 2.2.2.1 255.255.255.0
no ip directed-broadcast
pvc 2/200
protocol ip 2.2.2.2 broadcast
InARP is enabled on multipoint links by default. The following example, creates a multipoint
subinterface. By using the show atm map command, you can see that InARP builds a dynamic mapping
between the Layer 3 IP address and the Layer 2 VPI/VCI:
Router#show atm map
Map list ATM1/1/0.100_ATM_INARP : DYNAMIC
ip 1.1.1.2 maps to VC 19, VPI 2, VCI 100, ATM1/1/0.100
Map list ATM1/1/0.200_ATM_INARP : DYNAMIC
ip 2.2.2.2 maps to VC 20, VPI 2, VCI 200, ATM1/1/0.200
You can check the mapping using the show atm map command. In the following example, you can see
the mapping of Layer 3 to Layer 2 addresses is dynamic. Such mapping is dynamic using inverse ARP
as illustrated in the previous show atm map command example.
Router#show atm map
Map list ATM1/1/0.100_ATM_INARP : DYNAMIC
ip 1.1.1.2 maps to VC 19, VPI 2, VCI 100, ATM1/1/0.100
Map list ATM1/1/0.200pvc20 : PERMANENT
ip 2.2.2.2 maps to VC 20, VPI 2, VCI 200, ATM1/1/0.200, broadcast
You can use the inarp command to change the frequency of transmitting a new ATM InARP packet in
order to reconfirm the mapping:
Router(config-subif)#pvc 2/200
Router(config-if-atm-vc)#inarp ?
PA-A2 ATM CES Port Adapter Installation and Configuration
4-8
Enter VPI/VCI value(slash required)
Enter VCI value
Optional handle to refer to this connection
Chapter 4
Configuring the PA-A2 ATM CES Port Adapter
OL3460-01
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