Monitor Static Routes To Remote Networks - HP 7102dl - ProCurve Secure Router Configuration Manual

Monitor Static Routes to Remote Networks

In this scenario, Company A maintains a large central office and several
branch offices. Each branch office connects to the central office through an
Asymmetric Digital Subscriber Line (ADSL) connection, and the central office
routes traffic among these offices. The Branch Office 1 router knows a static
route to each remote office.
As a backup to reaching the remote offices through the central office, the
routers can use demand routing and create a temporary ISDN connection to
one of the remote offices. Because the Branch Office 1 router uses static
routing, you decide to configure network monitoring to test the routes to
remote offices and remove routes that fail the test. A floating route through a
demand interface will then appear in the routing table, allowing the router to
place a call to the correct branch office.
Figure 9-5 illustrates the Company A WAN.
Routing Table
0.0.0.0 /0 ppp 1
10.2.0.0 /16 ppp 1 track Branch2
10.3.0.0 /16 ppp 1 track Branch3
Router
Branch
office 1
10.1.1.1
Figure 9-5. Example of Monitoring Static Routes
Configuring Network Monitoring
Probe
Branch3
Central
Probe
Branch2
Failed
connection
ISDN Backup
connection
Branch
office 2
Network Monitoring
Router
Branch
office 3
10.3.1.1
Router
10.0.1.1
office
Router
10.2.1.1
9-45