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23-1
Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
OL-16506-17
23
PPP Half-Bridge on the Cisco ASR 1000 Series
Routers
First Published: December 12, 2014
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.
Note An interface cannot function as both a half-bridge and a full-bridge.
Finding Feature Information
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 “Feature Information for PPP Half-Bridge on the Cisco ASR 1000 Series Routers” section
on page 7.
Use Cisco Feature Navigator to find information about platform support and Cisco software image
support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on
Cisco.com is not required.
Contents
This module contains the following sections:
• Prerequisites for PPP Half-Bridge on the Cisco ASR 1000 Series Routers, page 2
• Information About PPP Half-Bridge on the Cisco ASR 1000 Series Routers, page 2
• PPP Half-Bridge Supported Features, page 3
• Configuration Examples for PPP Half-Bridge, page 3