A9K-8T/4-E, Cisco ASR 9000 Line Card, 8x10GE/Extended/Needs XFPs
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A9K-8T/4-E, Cisco ASR 9000 Line Card, 8x10GE/Extended/Needs XFPs

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Cisco A9K-8T/4-E Overview

 

The Cisco® ASR 9000 Series Ethernet Line Cards are the latest generation of service-provider-focused Carrier Ethernet line cards from Cisco. These line cards deliver economical, scalable, highly available, line-rate Ethernet and IP/Multiprotocol Label Switching (IP/MPLS) edge services. The Cisco ASR 9000 Series Line Cards A9K-8T/4-E and other Cisco ASR 9000 Series platform components are designed to provide the fundamental infrastructure for scalable Carrier Ethernet and IP/MPLS networks, supporting profitable business, residential, and mobile services.

Quick Spec

Table 1 shows the quick spec.

Part Number A9K-8T/4-E
Product Description 8-Port 10GE Oversubscribed Extended Line Card, requires XFPs
Supported Devices Cisco ASR 9000 Router
Connectivity 10-Mbps, 100-Mbps, 1-Gbps, and 10-Gbps 802.3 Ethernet
Memory 4 GB DRAM
Options Each line card is available as either a low queue, base or extended line card.
Physical dimensions (H x W x D); weight 14 x 1.72 x 20.5 in.(35.56 x 4.37 x 52.07 cm)

14 – 19 lb (6.35 – 8.62 kg)
Power Maximum 350W – 630W (depending on the card type); typical 310W – 565W (depending on the card type)
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A9K-8T/4-E Specification
Part Number A9K-8T/4-E
Product Description 8-Port 10GE Oversubscribed Extended Line Card, requires XFPs
Cisco IOS XR Software support ●  Modular software design: Cisco IOS XR Software demonstrates Cisco networking leadership in helping customers realize the power of their networks and the Internet. The software provides exceptional routing-system scalability, high availability, service isolation, and manageability to meet the mission-critical requirements of next-generation networks. ●  Operating system infrastructure protection: Cisco IOS XR Software provides a microkernel architecture that forces all but the most critical functions, such as memory management and thread distribution, outside of the kernel. This setup prevents failures in applications, file systems, and even device drivers from causing widespread service disruption. ●  Process and thread protection: Each process – even individual process threads – occurs in its own protected memory space, and communications between processes are accomplished through well-defined, secure, and version-controlled application programming interfaces (APIs). This setup significantly minimizes the effect that any process failure can have on other processes. ●  Process restart: The line cards offer the ability to restart critical control-plane processes both manually and automatically in response to a process failure, rather than restarting the entire OS. This feature helps to support the Cisco IOS XR Software goal of continuous system availability and allows for quick recovery from process or protocol failures with minimal disruption to customers or traffic. ●  State checkpointing: The line cards offer the capability to maintain a memory and critical operating state across process restarts so that routing adjacencies and signaling state can be maintained during an RSP switchover.
Flexible Ethernet services ●  Ethernet virtual connections (EVCs): Ethernet services are supported using individual EVCs to carry traffic belonging to a specific service type or end user through the network. EVC-based services can be used in conjunction with MPLS-based L2VPNs and native Ethernet switching deployments. ●  Flexible VLAN classification: VLAN classification into EFPs includes single-tagged VLANs, double-tagged VLANs (QinQ and 802.1ad), contiguous VLAN ranges, and noncontiguous VLAN lists. ●  IEEE bridging: The line cards support native bridging based on IEEE 802.1Q, IEEE 802.1ad, 802.1ah, and QinQ VLAN encapsulation mechanisms. ●  IEEE 802.1s Multiple Spanning Tree (MST): MST extends the 802.1w Rapid Spanning Tree Protocol (RSTP) to multiple spanning trees, providing rapid convergence and load balancing. ●  MST Access Gateway: The MST Access Gateway provides a resilient, fast-convergence mechanism for aggregating and connecting to Ethernet-based access rings.
L2VPN services ●  Virtual Private LAN Services (VPLS): These services are included in a class of VPN that supports the connection of multiple sites in a single bridged domain over a managed IP/MPLS network. VPLS presents an Ethernet interface to customers, simplifying the LAN and WAN boundary for service providers and customers, and supporting rapid and flexible service provisioning, because the service bandwidth is not tied to the physical interface. All services in a VPLS appear to be on the same LAN, regardless of location. ●  Hierarchical VPLS (HVPLS): HVPLS provides a level of hierarchy at the edge of the VPLS network for increased scale. Two options of HVPLS are supported: QinQ access and Ethernet over MPLS (pseudowire) access. ●  Virtual Private Wire Service (VPWS) with Ethernet over MPLS (EoMPLS): EoMPLS transports Ethernet frames across an MPLS core using pseudowires. Individual EFPs or traffic from an entire port can be transported over the MPLS backbone using pseudowires to an egress interface or subinterface. ●  Pseudowire redundancy: Pseudowire redundancy supports the definition of a backup pseudowire to protect a primary pseudowire that fails. ●  G.8032: G.8032 is a feature that provides the sub-50-ms protection for Ethernet traffic in a ring topology.  The implementation on the Cisco ASR 9000 Series is compliant with version 2 of the ITU-T standard. ●  Multisegment pseudowire stitching: Multisegment pseudowire stitching is a method for interworking two pseudowires together to form a cross-connect relationship.
Multicast ●  IPv4 Multicast: The line cards support Internet Group Management Protocol Versions 2 and 3 (IGMPv2 and v3), Protocol Independent Multicast-Source Specific Multicast (PIM-SSM), PIM sparse mode (PIM-SM), PIM SSM Mapping, Multicast Source Discovery Protocol (MSDP), Multicast VPN, and Anycast rendezvous point (RP). ●  IGMP v2 and 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 results are summarized into a single upstream join message. In residential broadband deployments, this scenario allows the network to send only channels that are being watched to the downstream users.
OA&M ●  Ethernet OA&M (EOAM) (IEEE 802.3ah): Ethernet link layer OA&M is a vital component of EOAM that provides physical-link OA&M to monitor link health and assist in fault isolation. Along with 802.1ag, Ethernet link layer OA&M can be used to assist in rapid link-failure detection and signaling to remote end nodes of a local failure. ●  EOAM (IEEE 802.1ag): Ethernet Connectivity Fault Management (E-CFM) is a subset of EOAM that provides numerous protocols and procedures that allow discovery and verification of the path through 802.1 bridges and LANs. ●  EOAM (ITU Y.1731): Y.1731 provides two separate feature sets: Fault Management (FM) and Performance Monitoring (PM).  Fault Management builds on 802.1ag message types to allow verification of the Ethernet network and provide a toolset for troubleshooting any found faults.  Performance Monitoring allows service providers to provide SLAs to their end customers by measuring the delay, latency, and loss across an Ethernet network. ●  Ethernet LMI (E-LMI): Ethernet Local Management Interface (E-LMI) is a protocol between the customer-edge (CE) device and the provider-edge (PE) device. It runs only on the PE-to-CE User Network Interface (UNI) link and notifies the CE device of connectivity status and configuration parameters of Ethernet services available on the CE port. ●  MPLS OA&M: The line cards support label switched path (LSP) ping, LSP traceroute, and VCCV.
Layer 3 routing ●  IPv4 routing: Cisco IOS XR Software supports a wide range of IPv4 services and routing protocols, including Border Gateway Protocol (BGP), Intermediate System-to-Intermediate System (IS-IS), Open Shortest Path First (OSPF), Routing Information Protocol (RIP), static, IPv4 Multicast, Routing Policy Language (RPL), and Hot Standby Router Protocol (HSRP) and Virtual Router Redundancy Protocol (VRRP) features. ●  IPv6 routing: Cisco IOS XR Software supports IPv6 services, including OSPFv3, IS-IS, Virtual Router Redundancy Protocol (VRRPv6), DHCPv6 relay, and static routing. ●  BGP Prefix Independent Convergence (PIC): BGP PIC provides the ability to converge BGP routes using the fast-convergence innovation that is distinctive to Cisco IOS XR Software.
MPLS L3VPN ●  MPLS L3VPN: The 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. CSC is implemented as defined by IETF RFC 4364. ●  Selective VRF Download:  This feature provides the ability to selectively download VRF forwarding information base (FIB) entries to line cards that have VRF membership for each VRF.  This provides larger FIB scale at a chassis level without burdening line cards with unnecessary FIB entries. ●  6PE and 6VPE: 6PE and 6VPE allow for introduction of IPv6 from the edge, in a scalable way, without any IPv6 addressing restrictions and without putting a well-controlled IPv4 backbone in jeopardy. This provides a solution that has minimal risk and operational cost with no effect on either the existing IPv4/MPLS backbone or edge and customer IPv6 networks.
MPLS Traffic Engineering (TE) ●  MPLS Traffic Engineering: Cisco IOS XR Software supports MPLS protocols, such as Traffic Engineering-Fast Reroute (TE-FRR), Resource Reservation Protocol (RSVP), Label Distribution Protocol (LDP), and Targeted Label Distribution Protocol (T-LDP). ●  MPLS Traffic Engineering Preferred Path: Preferred tunnel path functions let you map pseudowires to specific traffic engineering tunnels. Attachment circuits are cross-connected to specific MPLS TE tunnel interfaces instead of remote provider-edge router IP addresses (reachable using Interior Gateway Protocol [IGP] or LDP). ●  MPLS Traffic Engineering Auto-Bandwidth: MPLS TE automatic bandwidth adjustment provides the means to automatically adjust the bandwidth allocation for traffic engineering tunnels based on their measured traffic load. ●  Point to Multipoint (P2MP) Traffic Engineering:  The MPLS P2MP TE feature allows you to forward MPLS traffic from one source to multiple destinations. P2MP TE provides a single point of traffic control and the ability to configure explicit paths to optimize traffic distribution, while benefitting from extending FRR protection to P2MP TE sub-LSPs.
High availability ●  MPLS TE-FRR: MPLS Traffic Engineering-FRR delivers Layer 3 protection switching for networks currently configured with MPLS LSP. MPLS TE-FRR provides temporary rerouting around a failed link, node, or path. ●  Bidirectional Forwarding Detection (BFD): BFD is a detection protocol that is designed to provide fast-forwarding path-failure detection times for all media types, encapsulations, topologies, and routing protocols. ●  802.3ad Link Aggregation Bundles: The line cards support a bundle of multiple links to provide added resiliency and the ability to load-balance traffic over multiple member links. ●  Multichassis Link Aggregation Group (MC-LAG): MC-LAG provides a standards-based 802.3ad bundle for a connecting device to reach a pair of Cisco ASR 9000 Series Aggregation Services Routers that appear as a single router to the connecting device. Rapid restoration times are possible even if there is a link or node failure, which improves the operational environment for the connecting device. MC-LAG can work with a long list of solutions on the Cisco ASR 9000 Series routers, such as business L2VPN and L3VPN, residential service backhaul, mobile aggregation, and service provider edge.

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