C H A P T E R
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Cisco Secure Router 520 Series Software Configuration Guide
OL-14210-01
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Configuring PPP over Ethernet with NAT
The Cisco Secure Router 520 Ethernet-to-Ethernet routers support Point-to-Point Protocol over Ethernet
(PPPoE) clients and network address translation (NAT).
Multiple PCs can be connected to the LAN behind the router. Before the traffic from these PCs is sent
to the PPPoE session, it can be encrypted, filtered, and so forth.
Figure 3-1
shows a typical deployment
scenario with a PPPoE client and NAT configured on the Cisco router.
Figure 3-1
PPP over Ethernet with NAT
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Multiple networked devices—Desktops, laptop PCs, switches
2
Fast Ethernet LAN interface (inside interface for NAT)
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PPPoE client—Cisco Secure Router 520 Ethernet-to-Ethernet router
4
Point at which NAT occurs
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Fast Ethernet WAN interface (outside interface for NAT)
6
Cable modem or other server (for example, a Cisco 6400 server) that is connected to the Internet
7
PPPoE session between the client and a PPPoE server
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Internet
Summary of Contents for 520 Series
Page 15: ...xv Cisco Secure Router 520 Series Software Configuration Guide OL 14210 01 Preface ...
Page 18: ...xviii Cisco Secure Router 520 Series Software Configuration Guide OL 14210 01 Preface ...
Page 19: ...P A R T 1 Getting Started ...
Page 20: ......
Page 33: ...P A R T 2 Configuring Your Router for Ethernet and DSL Access ...
Page 34: ......
Page 103: ...P A R T 3 Configuring Additional Features and Troubleshooting ...
Page 104: ......
Page 123: ...P A R T 4 Reference Information ...
Page 124: ......
Page 162: ...Index IN 8 Cisco Secure Router 520 Series Software Configuration Guide OL 14210 01 ...