R0106-HP MSR Router Series Layer 2 - WAN Command Reference(V7)

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Field Descri
p
tion
Cause
Cause for a down physical link:
• Administratively—The link was shut down with the shutdown
command. To restore the physical state of the interface, use the undo
shutdown command.
• Not connected—No physical connection exists (probably due to
network cable failures).
encapsulation
Use encapsulation to configure the ATM AAL5 encapsulation type for a PVC or PVC-group.
Use undo encapsulation to restore the default.
Syntax
encapsulation { aal5mux | aal5nlpid | aal5snap }
undo encapsulation
Default
The ATM AAL5 encapsulation type is aal5snap.
Views
PVC view, PVC-group view
Predefined user roles
network-admin
Parameters
aal5mux: Specifies the MUX multiplexing encapsulation type.
aal5nlpid: Specifies the RFC1490 encapsulation type.
aal5snap: Specifies the LLC/SNAP encapsulation type.
Usage guidelines
Different encapsulation types support different mappings:aal5snap encapsulation supports IPoA, IPoEoA,
PPPoA, and PPPoEoA mappings.
• aal5mux encapsulation supports IPoA, IPoEoA, PPPoA, and PPPoEoA mappings, but cannot carry
multiple protocols.
• aal5nlpid encapsulation supports only IPoA mappings.
Follow these guidelines when you configure the ATM AAL5 encapsulation type:
• Devices on the two ends must be configured with the same ATM AAL5 encapsulation types.
• Only aal5snap supports InARP. You cannot configure InARP when aal5mux or aal5nlpid is used.
• Although a PVC or PVC-group can carry multiple protocols, a specific encapsulation type might not
support some of the applications (such as IPoA, IPoEoA, PPPoA, and PPPoEoA).
• When you change the encapsulation type for a PVC or PVC-group, and the mappings that you have
configured conflict with the new encapsulation type, the PVC or PVC-group deletes the
configurations of all conflicting mappings.
• This command is not applicable to PVCs in a PVC-group.