Operation Manual - Link Layer Protocol
H3C SecPath F1800-A Firewall
Chapter 2 PPP Configuration
4-17
Table 2-11
Configuring PPP link quality monitoring
Action
Command
Enable PPP link quality monitoring.
ppp lqc
close-percentage
[
resume-percentage
]
Disable PPP link quality monitoring.
undo ppp lqc
Note:
After PPP link quality monitoring is enabled, the serial port will send Link Quality
Reports (LQR) packets at each polling interval to replace the original polling interval
packets.
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 not be resumed unless the calculation
results of link quality are qualified for three consecutive times. Therefore, the link can
only be resumed after at least 30 polling intervals when it is disabled. If the polling
interval is set too long, it may cause the link fails to resume for a long time.
2.2.8 Configuring Callback
Do as follows in interface view.
Table 2-12
Configuring callback
Action
Command
Configure an interface as a callback server or
client.
ppp
callback
{
client
|
server
}
Disable the interface as a callback server or
client.
undo
ppp
callback
{
client
|
server
}
Note that one interface cannot serve as server and client at the same time.
2.2.9 Configuring the Dialing String Needed for Firewall Callback
Do as follows in interface view.
Do as follows when the firewall serves as the client of CBCP callback and meanwhile
the server permits calling back to the number specified by the user.
