Cisco Systems 2.5 Reasons Why an ATM Interface or Subinterface

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Cisco Router and Security Device Manager 2.5 User’s Guide
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Reasons Why an ATM Interface or Subinterface Configuration May Be Read-Only
•The interface is configured with the encapsulation frame-relay command
with an IP address on the main interface.
•The interface encapsulation is not “hdlc,” “ppp,” or “frame-re lay.”
•The encapsulation frame-relay ... command contains the mfr ... option.
•The interface is configured with the encapsulation ppp command, but the
PPP configuration contains unsupported commands.
•The interface is configured with the encapsulation frame-relay and
frame-relay map ... commands.
•The main interface is configured with the encapsulation frame-relay and
frame-relay interface-dlci ... commands.
•The main interface is configured with the encapsulation frame-relay
command and the subinterface is configured with the frame-relay
priority-dlci-group ... command.
•The subinterface is configured with the interfac e-dlci ... command that
contains any of the keywords “ppp,” “protocol,” or “switched.”
•The subinterface type is “multipoint,” instead of “point-to-point.”
•The subinterface is configured with any encapsulation other t han
“frame-relay.”
Reasons Why an ATM Interface or Subinterface
Configuration May Be Read-Only
A previously configured ATM interface or subinterface will be read-only and will
not be configurable in the following cases:
•It has a PVC with the dialer pool-member command.
•It has a PVC in which the protocol specified in the protocol command is not
ip.
•It has a PVC with multiple protocol ip commands.
•The encapsulation on the PVC is neither “aal5mux,” nor “aal5snap.”
•If the encapsulation protocol on aal5mux is not “ip.”
•If the IP Address is not configured on the PVC in the protocol ip command.