Cisco Systems 1000 Series Manual De Usuario

For situations in which routed network needs connectivity to a remote bridged Ethernet network, a serial 
or ISDN interface can be configured to function as a PPP half-bridge. The line to the remote bridge 
functions as a virtual Ethernet interface, and the router's serial or ISDN interface functions as a node on 
the same Ethernet subnetwork as the remote network.

The PPP full-bridge sends PPP packets to the PPP half-bridge, which converts them to routed packets 
and forwards them to other router processes. Likewise, the PPP half-bridge converts routed packets to 
Ethernet bridge packets and sends them to the PPP full-bridge on the same Ethernet subnetwork.

An interface cannot function as both a half-bridge and a full-bridge.

Your software release might not support all the features documented in this module. For the latest feature 
information and caveats, see the release notes for your platform and software release. To find information 
about the features documented in this module, and to see a list of the releases in which each feature is 
supported, see the 

.

Use Cisco Feature Navigator to find information about platform support and Cisco software image 
support. To access Cisco Feature Navigator, go to 

. An account on 

Cisco.com is not required.

This module contains the following sections: