Examples Of Network Monitoring; Monitor Connectivity To The Internet - HP 7102dl - ProCurve Secure Router Configuration Manual

Network Monitoring
Configuring Network Monitoring
9-42

Examples of Network Monitoring

This section provides examples of how you can configure probes and
tracks to:
monitor connectivity to the Internet and initiate a backup connection
should the primary connection fail
monitor static routes to remote networks and initiate a backup connec-
tion should the primary route fail
monitor connectivity to a mission-critical remote server
monitor network congestion and the performance of TCP servers, such
as FTP, Web, or email servers
inform your company's Web server whether a secondary or backup con-
nection is being used
Each example includes all of the commands necessary for configuring that
type of network monitoring.

Monitor Connectivity to the Internet

In this scenario, Company A maintains two Internet connections:
The ProCurve Secure Router's Ethernet 0/2 interface connects to a cable
modem. This is the primary Internet connection. The Ethernet interface
receives an IP address, a default route, and a DNS server addresses
through DHCP.
The router uses demand routing to initiate an ISDN connection to another
ISP only when the primary connection fails.
Company A's ProCurve Secure Router must monitor the primary Internet
connection because the Ethernet connection to the modem might remain good
even when the router cannot actually reach the Internet.
Figure 9-4 illustrates the Company A WAN.