Cisco Cisco IOS XR Software Release 3.9
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Release Notes for Cisco ASR 9000 Series Aggregation Services Routers for Cisco IOS XR Software Release 3.9.1
OL-22786-01
Introduction
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Obtaining Documentation and Submitting a Service Request, page 36
Introduction
Cisco IOS XR software is a distributed operating system designed for continuous system operation
combined with service flexibility and high performance.
combined with service flexibility and high performance.
Cisco IOS XR software running on the Cisco ASR 9000 Series Router provides the following features
and benefits:
and benefits:
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IP and Routing—Supports a wide range of IPv4 and IPv6 services and routing protocols; such as
Border Gateway Protocol (BGP), Routing Information Protocol (RIPv2), Intermediate
System-to-Intermediate System (IS-IS), Open Shortest Path First (OSPF), IP Multicast, Routing
Policy Language (RPL), Hot Standby Router Protocol (HSRP), and Virtual Router Redundancy
Protocol features (VRRP).
Border Gateway Protocol (BGP), Routing Information Protocol (RIPv2), Intermediate
System-to-Intermediate System (IS-IS), Open Shortest Path First (OSPF), IP Multicast, Routing
Policy Language (RPL), Hot Standby Router Protocol (HSRP), and Virtual Router Redundancy
Protocol features (VRRP).
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Ethernet Services—The Cisco IOS XR software Release 3.9.1 running on the
Cisco ASR 9000 Series Router supports the following Ethernet features:
Cisco ASR 9000 Series Router supports the following Ethernet features:
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Ethernet Virtual Connections (EVCs)
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Flexible VLAN classification
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Flexible VLAN translation
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IEEE bridging
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IEEE 802.1s Multiple Spanning Tree (MST)
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MST Access Gateway
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L2VPN
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Virtual Private LAN Services (VPLS), Hierarchical VPLS (H-VPLS), Virtual Private Wire
Service (VPWS), Ethernet over MPLS (EoMPLS), pseudo wire redundancy, and multi segment
pseudo wire stitching
Service (VPWS), Ethernet over MPLS (EoMPLS), pseudo wire redundancy, and multi segment
pseudo wire stitching
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BGP Prefix Independent Convergence—Provides the ability to converge BGP routes within sub
seconds instead of multiple seconds. The Forwarding Information Base (FIB) is updated,
independent of a prefix, to converge multiple 100K BGP routes with the occurrence of a single
failure. This convergence is applicable to both core and edge failures and with or with out MPLS.
This fast convergence innovation is unique to Cisco IOS XR software.
seconds instead of multiple seconds. The Forwarding Information Base (FIB) is updated,
independent of a prefix, to converge multiple 100K BGP routes with the occurrence of a single
failure. This convergence is applicable to both core and edge failures and with or with out MPLS.
This fast convergence innovation is unique to Cisco IOS XR software.
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Multiprotocol Label Switching (MPLS)—Supports MPLS protocols, including Traffic
Engineering (TE) [including TE-FRR and TE Preferred Path], Resource Reservation Protocol
(RSVP), Label Distribution Protocol (LDP), Targeted LDP (T-LDP), Differentiated Services
(DiffServ)-aware traffic engineering, and Layer 3 Virtual Private Network (L3VPN).
Engineering (TE) [including TE-FRR and TE Preferred Path], Resource Reservation Protocol
(RSVP), Label Distribution Protocol (LDP), Targeted LDP (T-LDP), Differentiated Services
(DiffServ)-aware traffic engineering, and Layer 3 Virtual Private Network (L3VPN).
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Multicast—Provides comprehensive IP Multicast software including Source Specific Multicast
(SSM) and Protocol Independent Multicast (PIM) in Sparse Mode only. The
Cisco ASR 9000 Series Router also supports Automatic route processing (AutoRP), Multiprotocol
BGP (MBGP), Multicast Source Discovery Protocol (MSDP), Internet Group Management Protocol
Versions 2 and 3 (IGMPv2 and v3), and IGMPv2 and v3 snooping.
(SSM) and Protocol Independent Multicast (PIM) in Sparse Mode only. The
Cisco ASR 9000 Series Router also supports Automatic route processing (AutoRP), Multiprotocol
BGP (MBGP), Multicast Source Discovery Protocol (MSDP), Internet Group Management Protocol
Versions 2 and 3 (IGMPv2 and v3), and IGMPv2 and v3 snooping.
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Quality of Service (QoS)—Supports QoS mechanisms including policing, marking, queuing,
random and hard traffic dropping, and shaping. Additionally, Cisco IOS XR supports modular QoS
command-line interface (MQC). MQC is used to configure various QoS features on various Cisco
platforms, including the Cisco ASR 9000 Series Router. Supports the following:
random and hard traffic dropping, and shaping. Additionally, Cisco IOS XR supports modular QoS
command-line interface (MQC). MQC is used to configure various QoS features on various Cisco
platforms, including the Cisco ASR 9000 Series Router. Supports the following: