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Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
OL-28417-02
Introduction to the Cisco ASR 9000 Series Aggregation Services Router
Cisco ASR 9000 Series Router Overview
• IPv4 Multicast—IPv4 Multicast delivers source traffic to multiple receivers without adding any
additional burden on the source or the receivers while using the least network bandwidth of any
competing technology. For more information on IPv4 Multicast, see Cisco ASR 9000 Series
Aggregation Services Router Multicast Configuration Guide.
• Routing Policy Language (RPL)—RPL provides a single, straightforward language in which all
routing policy needs can be expressed. For more information on RPL, see Cisco ASR 9000 Series
Aggregation Services Router Routing Configuration Guide.
• Hot Standby Router Protocol (HSRP)—HSRP is an IP routing redundancy protocol designed to
allow for transparent failover at the first-hop IP router. For more information on HSRP, see Cisco
ASR 9000 Series Aggregation Services Router IP Addresses and Services Configuration Guide.
• Virtual Router Redundancy Protocol (VRRP)—VRRP allows for transparent failover at the first-hop
IP router, enabling a group of routers to form a single virtual router. For more information on VRRP,
see Cisco ASR 9000 Series Aggregation Services Router IP Addresses and Services Configuration
Guide.
• Border Gateway Protocol (BGP) Add Path— This feature enables a BGP speaker to send multiple
paths for a prefix. For more information on BGP Add Path, see Cisco ASR 9000 Series Aggregation
Services Router Routing Configuration Guide.
• Cisco ASR 9000 Series Aggregation Services Router Routing Configuration GuideRoute
Convergence Monitoring and Diagnostics (RCMD)—This feature enables convergence monitoring
for SPF events and specific individual prefixes in OSPF and IS-IS. For more information on RCMD,
see the Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide.
• BFD over logical Bundle (BLB)—This feature replaces the BVLAN feature and resolves certain
interoperability issues with other platforms which run BFD over bundle interface in pure RFC5880
fashion. For more information on BLB, see the Configuring Bidirectional Forwarding Detection
module in Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide.
• Route and Label Consistency Checker (RCC and LCC)—The RCC and LCC is used to verify the
consistency between control plane and data plane route and label programming in IOS XR Software.
For more information on how to use the RCC and LCC, see the Cisco ASR 9000 Series Aggregation
Services Router Routing Configuration Guide.
• System-Wide Route and Label Prioritization—This feature provides faster and more consistent
Interior Gateway Protocol (IGP) convergence due to router or network events. For more information
on how to prioritize and download the critical routes and labels, see the Cisco ASR 9000 Series
Aggregation Services Router Routing Configuration Guide.
MPLS VPN
The router supports MPLS VPN, which offers the following:
• MPLS L3VPN—This IP VPN feature for MPLS allows a Cisco IOS Software or
Cisco
IOS XR software network to deploy scalable IPv4 Layer 3 VPN backbone services. An IP
VPN is the foundation that companies use for deploying or administering value-added services,
including applications and data hosting network commerce and telephony services, to business
customers.
• Carrier Supporting Carrier (CSC)—CSC allows an MPLS VPN service provider to connect
geographically isolated sites using another backbone service provider and still maintain a private
address space for its customer VPNs. It is implemented as defined by IETF RFC 4364.
• Inter-AS—is a peer-to-peer type model that allows extension of VPNs through multiple provider or
multi-domain networks. This lets service providers peer up with one another to offer end-to-end
VPN connectivity over extended geographical locations. An MPLS VPN Inter-AS allows:
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