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Configuring Encapsulation for Data PVCs

The encapsulation method on a data PVC represents the format of the data units that traverse the circuit. You can use the encapsulation command in ATM VC Configuration mode to configure the encapsulation method for a data PVC, or to restore the default encapsulation method, aal5snap.

For example, the following commands configure a data PVC that uses aal5all encapsulation. Issuing the exit command causes the configuration to take effect.



host1(config)#interface atm 3/0.3 

host1(config-subif)#pvc 6 0/250 

host1(config-subif-atm-vc)#encapsulation aal5all 

host1(config-subif-atm-vc)#exit 

host1(config-subif)#

encapsulation

Use to configure the encapsulation method on an ATM data PVC.
Specify one of the following encapsulation types:
- aal0—Causes the router to receive raw ATM cells on this PVC and forward the cells without performing AAL5 packet reassembly
- aal5all—Configures ATM over MPLS passthrough connections; the router passes through all ATM AAL5 traffic without interpreting it
- aal5autoconfig—Enables autodetection of the 1483 encapsulation (LLC/SNAP or VC multiplexed)
- aal5mux ip—Configures a VC-based multiplexed circuit used for IP only
- aal5snap—Configures an LLC encapsulated circuit; an LLC/SNAP header precedes the protocol datagram; this is the default encapsulation method
You must issue the exit command from ATM VC Configuration mode for the configuration to take effect.
Examplehost1(config-subif-atm-vc)#encapsulation aal5mux ip host1(config-subif-atm-vc)#exit
Use the no version to restore the default encapsulation method, aal5snap.
See encapsulation.

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