Configure MP 171

In MP working mode, it is not recommended to use PPP compression. To configure

PPPcompression 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.

6Configure 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

Operation

Command

 

 

Enable PPP link quality monitoring function

ppp lqc forbidden-percentage

 

[ resumptive-percentage ]

 

 

Disable PPP link quality monitoring function

undo ppp lqc

 

 

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-upto 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

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3Com 10014299 Perform the following configuration in interface view, Configure PPP link quality monitoring, Undo ppp lqc