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# Creating an NBMA Static Map

Static mapping creates an association between IP address–ATM PVC pairs for one or more member circuits of an ATM 1483 NBMA interface. Not every circuit necessarily gets the required association from a static map.

In the following procedure, you can repeat Step 2 for each circuit you want to map. You can associate with an interface a map group name that you have not already established. When you define the map list, the name is associated with that interface. You can perform Steps 3 and 4 before Steps 1 and 2 without affecting the results.

To set up a static map:

1. Create a map list by naming it.
   `
   host1(config)#map-list charlie
   `
2. Associate a protocol and an address with a specific virtual circuit.
   `
   host1(config-map-list)#ip 192.168.13.13 atm-vc 1 broadcast
   `
3. Specify an ATM interface.
   `
   host1(config-if)#interface atm 2/0
   `
4. Associate the map list with the interface.
   `
   host1(config-if)#map-group charlie
   `

atm pvc

- Use to configure a PVC on an ATM interface.
- InARP and refresh rate are optional parameters.
- InARP determines whether InARP requests are used and is specified on a per-circuit basis. If you disable InARP, you must use a static map table entry. Transmission over the circuit cannot occur unless you use either InARP or static map table entries.
- The default refresh rate is 15 minutes.
- You can configure InARP only if you specify the aal5snap encapsulation type.
- Example
  `
  host1(config-if)#atm pvc 6 0 11 aal5snap inarp 10
  `
- Use the no version to remove the specified PVC.
- See atm pvc.

interface atm

- Use to configure an ATM interface or subinterface type.
- For information about specifying the ATM interface or subinterface, see interface atm.
- Specify multipoint to identify the subinterface as NBMA.
- Examples
  `
  host1(config-if)#interface atm 0/1.20
  host1(config-if)#interface atm 0/0/4.20
  `
- Use the no version to remove the subinterface or the logical interface.
- See interface atm.

ip atm-vc

- Use to associate a protocol and address with a specific virtual circuit.
- Use this command repeatedly for each circuit to be mapped.
- This command is available in Map List Configuration mode only.
- Example
  `
  host1(config-map-list)#ip 192.168.13.13 atm-vc 1 broadcast
  `
- Use the no version to remove the association.
- See ip atm-vc.

map-group

- Use to associate the map list with an NBMA interface when configuring static mapping.
- You can issue this command before or after the map-list command without changing anything.
- This command is available in Interface Configuration mode only.
- See the map-list command.
- Example
  `
  host1(config-if)#map-group charlie
  `
- Use the no version to remove the association.
- See map-group.

map-list

- Use to create a map list when configuring static mapped NBMA interfaces.
- Limit the name of the map list to no more than 31 characters.
- You can create multiple map lists; however, you can associate only one map list with each physical interface.
- If a map list contains an entry for a VCD that was previously configured to run InARP, the map-group command fails. If this is the case, either reconfigure the circuit with InARP disabled, or remove the entry for that circuit from the map list.
- Example
  `
  host1(config)#map-list charlie
  `
- Use the no version to remove the map list.
- See map-list.

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