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Cisco uBR10012 Universal Broadband Router Software Configuration Guide
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Chapter1 Overview of CiscouBR10012 Universal Broadband Router Software Supported Software Features for the CiscouBR10012 Router
Generic Route Encapsulation (GRE) is a tunneling protocol that can encapsulate a variety of packet types
inside IP tunnels, creating a virtual point-to-point link to Cisco routers at remote points over an IP
internetwork.
IPv6 over L2VPN
Beginning with Cisco IOS Release 12.3(17a)BC, the Cisco uBR10012 router now supports IPv6 using
Layer 2 VPNs based on SID to 802.1q mapping. The Cisco uBR10012 router already supported
Transparent LAN service with Layer 2 VPNs in Cisco IOS Release 12.3(13a)BC and later releases. As
more Internet users switch to IPv6, the Cisco IPv6 protocol support helps enable the transition. IPv6
fixes a number of limitations in IPv4, such as limited numbers of available IPv4 addresses in addition to
improved routing and network autoconfiguration. This feature allows customers to introduce IPv6 into
their network with minimal operational impact.
For additional information about this feature, refer to the following documents on Cisco.com:
•IPv6 Documentation: overview, technology, design and configuration information
http://www.cisco.com/en/US/tech/tk872/tsd_technology_support_protocol_home.html
MPLS-VPN Network Support
Using Multiprotocol Label Switching Virtual Private Network technology (MPLS VPN), service
providers can create scalable and efficient private networks using a shared hybrid fiber-coaxial (HFC)
network and Internet protocol (IP) infrastructure. For overview and configuration information, refer to
the “Multiprotocol Label Switching” section in the Cisco IOS Switching Services Configuration Guide,
Release 12.2 on Cisco.com.
NetFlow Accounting Versions 5 and 8 Support
Cisco IOS Release 12.3(9a)BC introduces support for NetFlow Accounting Versions 5 and 8 on the
CiscouBR10012router.
Note The Cisco uBR10012 router requires the PRE2 performance routing engine module to support Netflow
in Cisco IOS Release 12.3(9a)BC, and later releases in the 12.3 BC train. Also note that performance
with packets-per-second (PPS) is reduced by 50% when Netflow is enabled, as two passes per packet are
required.
NetFlow enables you to collect traffic flow statistics on your routing devices. NetFlow provides network
administrators with access to “call detail recording” information from their data networks. Exported
NetFlow data can be used for a variety of purposes, including network management and planning,
enterprise accounting and departmental chargebacks, ISP billing, data warehousing and data mining for
marketing purposes.
NetFlow is based on identifying packet flows for ingress IP packets. It does not require any
connection-setup protocol either between routers or to any other networking device or end station and
does not require any change externally—either to the traffic or packets themselves or to any other
networking device.
NetFlow is completely transparent to the existing network, including end stations and application
software and network devices like LAN switches. Also, NetFlow is performed independently on each
internetworking device, it need not be operational on each router in the network. Using NetFlow Data