OL-30498-01

December 2013

Initial version of the document.

OL-30498-02

March 2014

• Configuring Power over Ethernet—Effective with Cisco IOS Release 15.4(2)S, support was provided for Power over Ethernet (PoE) on the FA chassis models of the Cisco ASR 901S router. PoE can be enabled or disabled using the Cisco IOS CLI.
• 802.1ad for EVC Cross Connect—Effective with Cisco IOS release 15.4 (2) S, the Cisco ASR 901S router supports configuring EVC default encapsulation with xconnect.
• ACL-based QoS—Effective with Cisco IOS release 15.4 (2)S, the Cisco ASR 901S router supports ACL-based QoS on Layer 4. This feature allows you to configure the Layer 3 or Layer 4 options while configuring the ACL for QoS on ingress only. Layer 3 or layer 4 options like ToS, source port, and destination port are supported.
• Auto-IP—Effective with Cisco IOS release 15.4 (2)S, the Cisco ASR 901S router supports Auto-IP feature. The auto-IP feature automatically provides IP addresses to the nodes inserted into a ring. In ring topology, when a device is inserted into the ring, the neighboring node interfaces require manual reconfiguration. The auto-IP feature addresses the problem of manually reconfiguring nodes during insertion, deletion, and movement of nodes within the ring.
• BGP - Accumulated IGP—The BGP Accumulated IGP feature is an optional non-transitive Border Gateway Protocol (BGP) path attribute. The attribute type code for the accumulated interior gateway protocol (AIGP) attribute is assigned by the Internet Assigned Numbers Authority (IANA). The value field of the AIGP attribute is defined as a set of type, length, value (TLV) elements. The AIGP TLV contains the AIGP metric.

• G.8032 at Interface Level—The ITU-T G.8032 Ethernet Ring Protection Switching feature implements protection switching mechanisms for Ethernet layer ring topologies. This feature uses the G.8032 Ethernet Ring Protection (ERP) protocol, defined in ITU-T G.8032, to provide protection for Ethernet traffic in a ring topology, while ensuring that no loops are within the ring at the Ethernet layer. The loops are prevented by blocking traffic on either a predetermined link or a failed link.
• IGMP Snooping—IGMP snooping allows a router to examine IGMP packets and make forwarding decisions based on their content. Using IGMP snooping, the router intercepts IGMP messages from the host and updates its multicast table accordingly.
• IPv6 Services: Extended Access Control Lists—The standard ACL functionality in IPv6 is similar to standard ACLs in IPv4. Access lists determine what traffic is blocked and what traffic is forwarded at router interfaces and allow filtering based on source and destination addresses and inbound interface. Each access list has an implicit deny statement at the end. IPv6 ACLs are defined and their deny and permit conditions are set using the ipv6 access-list command with the deny and permit keywords in global configuration mode.
• MLD Snooping—MLD is a protocol used by IPv6 multicast routers to discover the presence of multicast listeners (nodes looking to receive IPv6 multicast packets) on its directly attached links, and to discover which multicast packets are of interest to neighboring nodes.
• Network Address Translation—Effective with Cisco IOS Release 15.4(2)S, you can configure Network Address Translation (NAT) for IP address conservation. This module also provides information about the benefits of configuring NAT for IP address conservation.
• TWAMP RFC Compliance—The TWAMP RFC compliance feature supports RFC 5357 which specifies a Two-Way Active Measurement Protocol (TWAMP), based on the One-way Active Measurement Protocol (OWAMP), that adds two-way or round-trip measurement capabilities.

OL-30498-03

July 2014

• IP Security—The IP Security feature enables you to configure the Internet Key Exchange (IKE) protocol for basic IP Security (IPsec) Virtual Private Networks (VPNs). IKE is a key management protocol standard that is used in conjunction with the IPsec standard. IPsec is an IP security feature that provides robust authentication and encryption of IP packets.

• 1588 PTP Best Master Clock Algorithm—1588 PTP Best Master Clock Algorithm (BMCA) is used to select the master clock on each link, and ultimately, select the grandmaster clock for the entire PTP domain. BCMA runs locally on each port of the ordinary and boundary clocks, and selects the best clock on the link by comparing the local data sets with the received data from the announce messages.

• BFD Support for Multicast (PIM)—The Bidirectional Forwarding Detection (BFD) Support for Multicast (PIM) feature, also known as PIM BFD, registers PIM as a client of BFD. PIM can then utilize BFD to initiate a session with an adjacent PIM node to support BFD's fast adjacency failure detection in the protocol layer.

• CFM CCM Hardware Offload—Effective from Cisco IOS Release 15.4(3)S, the Cisco ASR 901S router supports CFM hardware offloading. Configuring Ethernet CFM for offload CFM session requires configuring the CFM domain with the supported offload CCM intervals 3.3 ms,10 ms, and 100 ms. You can optionally configure the sampling rate for the offload cfm sessions and the default sampling rate is 20000.

• DHCP Snooping with Option-82 on EVC—DHCP Snooping is one of the switch features on the Cisco ASR 901S series routers that will be supported while functioning as a Layer 2 switch.

• G.8032 and Psuedo Preemption Support—Effective from Cisco IOS Release 15.4(3)S, the Cisco ASR 901S router supports G.8032 on port-channel interface.

• IP Multicast VRF Lite—The IP Multicast VRF Lite feature provides IPv4 multicast support for multiple virtual routing/forwarding contexts (VRFs). The IPv4 Multicast VRF Lite feature simplifies the management and troubleshooting of traffic belonging to a specific VRF.

• IPv6 Multicast VRF Lite—The IPv6 Multicast VRF Lite feature provides IPv6 multicast support for multiple virtual routing/forwarding contexts (VRFs). The IPv6 Multicast VRF Lite feature simplifies the management and troubleshooting of traffic belonging to a specific VRF.

• PTP Loopback Interface VRF Awareness—PTP support over virtual routing and forwarding (VRF) instance-enabled interfaces allows the PTP loopback interface to be part of VRF rather than maintaining the loopback addresses in the global routing table. This enables the service providers to reuse the same IP address for multiple loopback interfaces by configuring PTP loopback under VRF.

• PTP over Ethernet—Effective from Cisco IOS Release 15.4(3)S, the Cisco ASR 901S router supports PTP over Ethernet.

• Configuring Wi-Fi Management Interface—Effective with Cisco IOS Release 15.4(3)S, support is provided for the Wi-Fi management interface on the FA chassis models of the Cisco ASR 901S router. The Wi-Fi management interface can be enabled or disabled using the Cisco IOS CLIs.

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Commands and keywords.

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Variables for which you supply values.

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Keywords or arguments that appear within square brackets are optional.

{x | y | z}

A choice of required keywords appears in braces separated by vertical bars. You must select one.

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Examples of information displayed on the screen.

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Examples of information the user enters.

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Nonprinting characters, for example passwords, appear in angle brackets.

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Default responses to system prompts appear in square brackets.