3Com 3C421600A Reference Manual page 117

To monitor PPP events using this command, first issue a show events
command as a managed user dialing in. Monitor ppp is limited to
checking PPP data streams. The command performs the following types
of monitoring:
Monitoring PPP call events — Displays internal PPP states as they
change for each interface. Most of these events are displayed as
events if the proper logging level is set for PPP. This is the only
monitoring option that displays the action of more than one PPP
session.
Monitoring a specific interface — Displays all PPP packets
transmitted and received on the specified interface. If a session is
active on the specified interface, monitoring begins immediately. If
not, monitoring begins with the next session on that interface. If one
session stops and starts, monitoring continues.
Monitoring the next session that starts up — Displays results for
next PPP session created. This option is useful if a user is having
difficulty connecting and it is unclear on which interface the user
connects because of inclusion in a hunt group. As soon as the next
incoming or outgoing PPP call is established, monitoring begins. There
is no differentiation on the next session. The user selects to monitor
the next session and sees the next session displayed, regardless of the
interface or username employed.
Only one monitor may be used for Next Session at any one time.
Monitoring a specific user — Displays any PPP sessions currently
active for the specified user. As any new session begins for the user,
monitoring also begins. This is the best method to display data from a
multilink session.
Since the PPP session does not have a user associated with it until
authentication occurs, this method of monitoring does not permit tracing
of the authentication negotiation.
Exiting the monitor — Exits the program.
Monitoring To pause the output, press Escape.
Stop/Start
All PPP packets sent or received while the monitor is "paused" are lost
and not saved, while waiting for the program to resume. Also, if a call is
dropped at any time, you must return to the monitor and start again.
Monitor Commands 117