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Configuring and Managing Point-to-Point Protocol (PPP) Ports 19-7
Displaying PPP Characteristics
Displaying IPCP Characteristics
The SHOW/LIST/MONITOR PPP IPCP CHARACTERISTICS command displays
the IPCP configuration for a given port. The fields in the display show the latest values
configured by the SET PORT
n
PPP IPCP characteristic commands. Use the SHOW/
MONITOR PORT
n
PPP IPCP STATUS command to see the values actually used on
the link.
Magic Number* The current magic
number.
Disabled Disabled
PF Compress Indicates if the access
server negotiates to allow
its peer to omit the extra
protocol field byte from
packets sent over the
link.
Enabled
Disabled
Disabled
ACF Compress Indicates if the access
server negotiates to allow
its peer to omit the
HDLC address and
control fields from
packets sent over the
link.
Enabled
Disabled
Disabled
FCS Size* The size of the FCS that
the access sever is
configured to negotiate.
16-bit 16-bit
Callback** Indicates that the access
server negotiates to
request a call-back.
Enabled
Disabled
Enabled
Note:
*This field has a fixed value in this software release.
Note:
** If you enable PPP call-back negotiation on a port, it is strongly
recommended you also enable some sort of authentication (PAP, CHAP, etc.) on
the port. Without authentication, any user who happens to discover the phone
number for that port’s modem could potentially request a call-back and run up
unlimited phone charges. To enable authentication on a port, refer to Chapter 22.
Field Description Values Default