Configuring an ATM class
An ATM class facilitates ATM configuration. Configurations of PVC MAP, encapsulation type, OAM loopback, and service category can be implemented through an ATM-Class. First, create an ATM class and set the parameters needed, and then call the ATM class in PVC view or ATM interface view.
When you configure a PVC, follow these guidelines:
The priorities of the same configurations performed to a PVC descend in the following order: the configuration directly performed to the PVC, the configuration performed to the ATM class applied to the PVC, and the configuration performed to the ATM class applied to the ATM interface.
For different configurations that conflict with each other, their priorities descend in the following order: the configuration directly performed to the PVC, the configuration performed to the ATM class applied to the PVC, and the configuration performed to the ATM class applied to the ATM interface.
All the configurations directly performed to the PVC, performed to the ATM class applied to the PVC, and performed to the ATM class applied to the ATM interface take effect if they do not conflict.
For different configurations performed to a PVC, the ATM class applied to the PVC, and the ATM class applied to the ATM interface, if the configurations conflict with each other, those applied first take effect, and the conflict prompt appears when the rest are performed.
When an ATM class is applied to a PVC, no message is prompted no matter whether or not the ATM class is successfully applied.
Error messages appear when configurations performed to a PVC are invalid.
To configure an ATM class:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Create an ATM class and enter ATM class view. | atm class atm-class-name | N/A |
3. Specify ATM AAL5 encapsulation type for the PVC. | encapsulation aal5-encap | Optional. By default, aal5snap encapsulation is adopted. |
4. Start transmission of OAM F5 Loopback cells or retransmission check of OAM F5 Loopback. | oam frequency frequency [ up up-count down down-count retry-frequency retry-frequency ] | Optional. By default, OAM F5 Loopback cell transmission is disabled. However, if an OAM F5 Loopback cell is received, it should be responded. By default, up-count is 3, down-count is 5 and retry-frequency is 1 second. |
5. Set the PVC's service type and rate-related parameters. |
| Optional. By default, the service type of a PVC is UBR. You can use these four commands to set the service type and the parameters concerning transmission rate. A newly configured service type overwrites the existing one. |
6. Configure the service type (use different commands according to service types). |
| Optional. By default, mapping is not configured. When a mapping is configured, pseudo-broadcast is not supported by default. Before configuring InARP, make sure the aal5snap encapsulation is used. Though InARP is also supported when using aal5mux or aal5nlpid encapsulation, the system will prompt a message indicating a failure when this ATM is configured and used on PVC. |
7. Return to system view | quit | N/A |
8. Enter ATM interface view or PVC view |
| N/A |
9. Enable the ATM class on the interface or PVC | atm-class atm-class-name | N/A |