Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide Chapter 1 PPP and MP Configuration Commands
3Com Corporation
1-12
Use the undo ppp lqc command to disable PPP link quality control.
By default, PPP LQC is disabled.
By default, the arguments resumptive-percentage and forbidden-percentage are equal.
You may use PPP LQC to monitor quality of PPP links including those in MP bundles.
The system shuts down a link when its quality decreased below the
forbidden-percentage and brings it up when its quality ameliorates exceeding the
resumptive-percentage. When re-enabling the link, PPP LQC experiences a delay to
avoid link flapping.
Note that the value of resumptive-percentage must be equal to or greater than that of
forbidden-percentage.
When enabling LQC at both ends of a PPP link, you must use the same parameter
settings on the routers at both ends. Normally, you are not encouraged to enable LQC
at both ends of a link.
Besides, you are not encouraged to enable PPP LQC on a dial-up line. That is because
in case the link is disabled, the DCC would disconnect the dial-up line, resulting in
inability of LQC to work. LQC can operate again only after the DCC brings the dial-up
line up again for transmitting data.
Related command: timer hold.
Example
# Enable LQC on interface Serial 0/0/0, setting forbidden-percentage to 90% and
resumptive-percentage to 95%.
[Router-Serial0/0/0] ppp lqc 90 95
1.1.13 ppp mp
Syntax
ppp mp
undo ppp mp
View
Interface view
Parameter
None
Description
Use the ppp mp command to enable the interface encapsulated with PPP to operate in
the MP mode.