HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual page 932

Appendix A: Example Configuration
Overview
Office Requirements
Prague • Constantly exchange data with main
office, which is located in Germany.
Find cost-effective, secure solution.
• Periodically exchange data with
Mannheim office. Speed is less
important than cost.
• Internet access. Security to protect
the company's WAN and LAN is
critical.
Dublin • Constantly exchange data with main
office. Find cost-effective, secure
solution.
• Periodically exchange data with
Mannheim office. Speed is less
important than cost.
• Internet access. Security to protect
the company's WAN and LAN is
critical.
A-4
To connect the Berlin office to the branch offices outside Germany, the
company uses Frame Relay running over E1-carrier lines. The Mannheim and
Berlin offices are connected with an Asymmetric Digital Subscriber Line
(ADSL) connection, which is less expensive and provides more bandwidth
than a dedicated E1-carrier line. Because these two offices require a constant
connection in order to do business, the company purchases a backup ISDN
line to provide high availability.
ProCurve Retail uses Integrated Services Digital Network (ISDN) connections
to connect the branch offices in Prague and Dublin to the Mannheim office.
ISDN provides a cost-effective WAN connection because the company pays
for the connection only when it is needed. An ISDN connection works well
because the branch offices exchange information only periodically. For exam-
ple, the Dublin and Prague offices upload sales information to the Mannheim
network once a week, and the Mannheim office then uses this information to
forecast manufacturing.
In addition, these offices all require Internet access. The offices will lease an
E1-carrier line to connect to a local Internet service provider (ISP).
Solution
• Frame Relay over E1-carrier
line
• ISDN connection
• E1-carrier line with PPP and
firewall protection
• Frame Relay over E1-carrier
line
• ISDN connection
• E1-carrier line with PPP and
firewall protection
Router
ProCurve Secure Router
7102dl
• two-port E1 module
• two-port ISDN BRI S/T
module
• built-in firewall
ProCurve Secure Router
7102dl
• two-port E1 module
• two-port ISDN BRI S/T
module
• built-in firewall