3Com MSR 30, MSR 50 manual Encapsulation, Syntax encapsulation aal5-encap Undo encapsulation, Index

298CHAPTER 19: ATM CONFIGURATION COMMANDS

Table 27 Description on the fields of the display atm pvc-info command

Field	Description
PVC-NAME	PVC name
INDEX	Internal index of the PVC
ENCAP	AAL5 encapsulation type of the PVC
PROT	Upper protocol running on the PVC
INTERFACE	Interface to which the PVC belongs

encapsulation

Syntax encapsulation aal5-encap

undo encapsulation

View PVC view/ATM Class view

Parameter aal5-encap: AAL5 encapsulation type; its possible values are as follows:

■aal5mux: MUX encapsulation type

■aal5nlpid: RFC1490 encapsulation type

■aal5snap: LLC/SNAP (logical link control/subnet access protocol) encapsulation type

Description Use the encapsulation command to specify ATM AAL5 encapsulation type for PVC.

Use the undo encapsulation command to restore the default.

By default, aal5snap encapsulation is adopted.

Note that:

■Among aal5snap, aal5mux and aal5nlpid, only aal5snap encapsulation supports InARP.

■If InARP is enabled, you need to disable it before change AAL5 encapsulation to aal5mux or aal5nlpid.

■An ATM PVC can carry multiple protocols simultaneously, but certain types of encapsulations may not support some applications (one or more of IPoA, IPoEoA, PPPoA and PPPoEoA). When such cases occur, the system gives a prompt.

Example # Specify the AAL5 encapsulation of PVC 1/32 on ATM 1/0 interface to aal5snap.

<Sysname>system-view

[Sysname] interface atm 1/0

[Sysname-Atm1/0] pvc 1/32

[Sysname-atm-pvc-Atm1/0-1/32] encapsulation aal5snap