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Configure MP 171
In MP working mode, it is not recommended to use PPP compression. To configure
PPP compression negotiation on the virtual interface, PPP compression must be
configured on Virtual-template interface before the subordinate physical interface
can accept the PPP compression negotiation.
6 Configure PPP Link Quality Monitoring
PPP link quality monitoring can be a real time monitoring the PPP link quality
(including PPP links bound to MP). When link quality is lower than the Disabled
Quality Percentage, link will be disabled. When link quality restores to the
Restoring Link Quality Percentage, link will be automatically resumed. To ensure
that links do not repeatedly oscillate between disabled status and restored status,
there will be certain time delay when PPP link quality monitoring resumes the link.
Perform the following configuration in interface view.
Table 202 Configure PPP link quality monitoring
By default, the parameter resumptive-percentage is equal to
forbidden-percentage.
Before PPP link quality monitoring is enabled, PP interface sends keepalive packets
every period. After the function is enabled, PPP interface will replace the keepalive
packets by LQR packets, that is, PPP interface will send LQR packets every period,
in order to monitor the link.
When link quality is normal, the system will calculate the link quality in each LQR
packet. If the calculation results turn out to be unqualified for two consecutive
times, the link will be disabled. After the link is disabled, the system will calculate
the link quality in every ten LQR packets. The link will be resumed only if the
calculation results of link quality are qualified for three consecutive times.
Therefore, the link can only be resumed at least 30 keepalive periods after it is
disabled. If the keepalive period is set too long, it may cause no resumption of
links for a long time.
Configure MP The following section describes the configuration tasks of MP application on
virtual template. Please Refer to Dial-up to know about MP configuration under
BDR mode (Including MP on the interfaces of ISDN BRI/PRI).
MP application on virtual template configuration includes:
■ Create Virtual Template
■ Configure Operating Parameters of Virtual Template
■ Configure the Physical Interface to work in MP Mode
■ Bind the Physical Interface to a Virtual Template
Operation Command
Enable PPP link quality monitoring function ppp lqc forbidden-percentage
[ resumptive-percentage ]
Disable PPP link quality monitoring function undo ppp lqc