notes: PPP Link Quality Monitoring (LQM)

- The PPP suite includes a feature that allows devices to analyze the quality of the link.
- LCP provides an optional link quality determination phase. In this phase, LCP tests the link to determine whether the link quality is sufficient to use layer3 protocols.

- The command "ppp quality percentage" ensures that the link meets the quality requirement set; otherwise, the link is brought down.
- The percentages are calculated for both incoming and outgoing directions.
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COMMANDS
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debug ppp packet - Shows specific LCP operation

interface s0
ppp quality {percentage} - Enables link quality monitoring