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Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
OL-16506-17
Chapter 23 PPP Half-Bridge on the Cisco ASR 1000 Series Routers
Prerequisites for PPP Half-Bridge on the Cisco ASR 1000 Series Routers
• Verifying PPP Half-Bridge, page 3
• Additional References, page 6
• Feature Information for PPP Half-Bridge on the Cisco ASR 1000 Series Routers, page 7
Prerequisites for PPP Half-Bridge on the Cisco ASR 1000 Series
Routers
PPP encapsulation must be enabled under the interface to use PPP half-bridge on ASR 1000 Series
Routers.
Information About PPP Half-Bridge on the Cisco ASR 1000 Series
Routers
Figure 1 shows a half-bridge configuration. The router port connecting to the bridge is configured as a
serial interface to the PPP half-bridge. The interface functions as a virtual node on the Ethernet
subnetwork on the bridge. The serial interface has an IP address associated with the Ethernet
subnetwork.
Figure 23-1 PPP Half-Bridge Configuration
When a packet destined to the Ethernet arrives at the PPP half-bridge, it is converted to Ethernet packets,
encapsulated in PPP frames, and sent on the Ethernet bridge link. The PPP full-bridge decapsulates PPP
header, and forwards the Ethernet packet with bridge functionality.
Ethernet
364323
PPP Half-Bridge PPP/MP PPP Full-Bridge Host
(101.0.0.2)
Serial
Output
101.0.0.1
101.0.0.4
101.0.0.4