Cisco XR 12000 Series Getting Started Manual page 17

Chapter 1 Introduction to Cisco IOS XR Software
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Multicast
The router supports multicast, which offers the following:
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OAM
The router supports different types of operations, administration, and maintenance (OAM), which offers
the following:
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Layer 3 Routing
The router runs Cisco IOS XR Software, which supports Layer 3 routing and a range of IPv4 services
and routing protocols, including the following:
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OL-24755-01
Multisegment pseudowire stitching—This feature is a method used to interwork two pseudowires
together to form a cross-connect relationship.
IPv4 Multicast—IPv4 Multicast supports Internet Group Management Protocol Versions 2 and 3
(IGMPv2/v3), Protocol Independent Multicast Source Specific Multicast (SSM) and Sparse Mode
(SM), Multicast Source Discovery Protocol (MSDP), and Anycast Rendezvous Point (RP).
IGMP v2/v3 Snooping—This Layer 2 mechanism efficiently tracks multicast membership on an
L2VPN network. Individual IGMP joins are snooped at the VLAN level or pseudowire level, and
then it summarizes the results into a single upstream join message. In residential broadband
deployments, this feature enables the network to send only channels that are being watched to the
downstream users.
E-OAM (IEEE 802.3ah)—Ethernet link layer OAM is a vital component of EOAM that provides
physical-link OAM to monitor link health and assist in fault isolation. Along with IEEE 802.1ag,
Ethernet link layer OAM can be used to assist in rapid link-failure detection and signaling to remote
end nodes of a local failure.
E-OAM (IEEE 802.1ag and ITU-T Y.1731)—Ethernet Connectivity Fault Management (CFM) is a
service-level OAM protocol that provides a number of mechanisms for fault management and
performance monitoring. This includes procedures for monitoring and verifying the path between
multiple end points, via IEEE 802.1 bridges and LANs.
MPLS OAM—This protocol supports Label Switched Path (LSP) ping, LSP TraceRoute, and Virtual
Circuit Connectivity Verification (VCCV). .
Ethernet SLA (Service Level Agreement)—The router supports a feature-rich manageability
interface for performance monitoring, using the capabilities provided by the Ethernet CFM.
Ethernet Fault Detection—The router supports a mechanism to use faults detected by Ethernet OAM
protocols as a trigger to bring down interfaces or sub-interfaces. Hence, there is a trigger protection
switching or L3 re-routing during a failure.
Intermediate System-to-Intermediate System (IS-IS)—Integrated Intermediate IS-IS, Internet
Protocol Version 4 (IPv4), is a standards-based Interior Gateway Protocol (IGP). For more
information on IS-IS, see Cisco IOS XR Routing Configuration Guide for the Cisco XR 12000 Series
Router.
Open Shortest Path First (OSPF)—OSPF is an IGP developed by the OSPF working group of the
Internet Engineering Task Force (IETF). For more information on OSPF, see Cisco IOS XR Routing
Configuration Guide for the Cisco XR 12000 Series Router.
Cisco IOS XR Getting Started Guide for the Cisco XR 12000 Series Router
Cisco XR 12000 Series Router Overview
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