AI2524 Router Card User’s Manual

3. Configure Router zzz.

hostname zzz interface serial 0 encapsulation ppp

pppauthentication chap username xxx password secretxz username yyy password secretzy

When you look at the configuration file, the passwords will be en crypted and the display will look similar to:

hostname xxx interface serial 0 encapsulation ppp

pppauthentication chap username yyy password 7 121F0A username zzz password 7 1329A05

Enable Link Quality Monitoring (LQM)

Link Quality Monitoring (LQM) is available on all serial interfaces running PPP. LQM will monitor the link quality, and if the quality drops below a configured percentage, the router shuts down the link. The percentages are calculated for both the incoming and outgoing di- rections. The outgoing quality is calculated by comparing the total number of packets and bytes sent to the total number of packets and bytes received by the destination node. The incoming quality is calcu- lated by comparing the total number of packets and bytes received to the total number of packets and bytes sent by the destination peer.

When LQM is enabled, Link Quality Reports (LQRs) are sent every keepalive period. LQRs are sent in place of keepalives. All incoming keepalives are responded to properly. If LQM is not configured, kee- palives are sent every keepalive period and all incoming LQRs are re- sponded to with an LQR.

In interface configuration mode, enable LQM on the interface:

ppp quality percentage

The percentage argument specifies the link quality threshold. That per- centage must be maintained, or the link is deemed to be of poor quality and taken down.

Page 11-6

August 1997

 

2524UM

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AIS AI2524 user manual Enable Link Quality Monitoring LQM, Configure Router zzz, Ppp quality percentage