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Building on the success of the Cisco® Network Convergence System 5501 (NCS-5501), the Cisco Network Convergence System 55A1-24Q6H-S (NCS-55A1-24Q6H-S) and 55A1-24Q6H-SS (NCS-55A1-24Q6H-SS) offer improvements designed to meet the challenges of the zettabyte era. The NCS-55A1-24Q6H-S and NCS-55A1-24Q6H-SS provide dense 1G/10G/25G/40G/100G functionality in a 1-rack-unit package with line-rate MACsec at 10G/25G/40G/100G speeds and Precision Time Protocol (PTP) Synchronous Ethernet (SyncE)/1588 Class B timing. With ultralow per-bit power consumption, deep packet buffering, and optimized forwarding architecture, the NCS-55A1-24Q6H-S and NCS-55A1-24Q6H-SS have the flexibility to be deployed across various network roles, including 5G Mobile Backhaul, Top of Rack (ToR), spine-and-leaf, and Converged Interconnect Network (CIN). Built to take full advantage of the advanced capabilities you have come to expect from Cisco IOS® XR, the NCS-55A1 fixed-chassis models boast advanced packet classification, segment routing, ultrawide Equal-Cost Multipathing (ECMP), programmable network management, and telemetry to make your network smarter, faster, and more agile.

Cisco NCS-55A1-24Q6H-S chassis – MACsec on some ports (6X100G and 16 of the 24X25G ports)

Figure 1.

Cisco NCS-55A1-24Q6H-S chassis – MACsec on some ports (6X100G and 16 of the 24X25G ports) at 10G/25G/40G/100G speeds

Cisco NCS-55A1-24Q6H chassis

Figure 2.

Cisco NCS-55A1-24Q6H-SS chassis - MACsec on all ports (6X100G, 24X25G, and 24X10G) at 10G/25G/40G/100G speeds

Cisco IOS XR Software overview

The Cisco NCS 5500 Series fixed-chassis models are powered by the industry-leading, carrier-class, 64-bit version of Cisco IOS XR Software, designed for operational efficiency, optimized utilization, and service agility (as part of the Cisco Evolved Programmable Network). Cisco IOS XR Software offers rich features such as iPXE boot, auto-provisioning, native support for third-party application hosting, machine-to-machine interface, telemetry, and flexible software package delivery.

Software requirement

The Cisco NCS-55A1-24Q6H-S fixed chassis supports Cisco IOS XR Software Release 6.6.25 and later.

The Cisco NCS-55A1-24Q6H-SS fixed chassis supports Cisco IOS XR Software Release 7.2.1 and later.

Specifications

Tables 1 through 4 list key specifications for the Cisco NCS-55A1-24Q6H-S and NCS-55A1-24Q6H-SS fixed chassis.

Table 1. Features and benefits

Feature

NCS-55A1-24Q6H-S specification

NCS-55A1-24Q6H-SS specification

Integrated interface

1, 10, 25, 40, and 100 Gigabit Ethernet support

Industry-leading, carrier-class Cisco IOS XR Software

Visibility and telemetry

Machine-to-machine interface

Application hosting

Flexible platform and packaging

Modularity

Automation

Visibility and telemetry

Machine-to-machine interface

Application hosting

Flexible platform and packaging

Modularity

Automation

Management ports

Provide easy access to system console

External USB port

Helps simplify image and file management

Solid-State Drive (SSD)

Memory for storing software image, configuration, logging, and recovery

Power consumption

Ultralow .37W per gigabit

Redundancy

Redundant fan tray

Redundant AC or DC power supply

Redundant fan tray

Redundant AC or DC power supply

Table 2. Specifications

Feature

NCS-55A1-24Q6H-S specification

NCS-55A1-24Q6H-SS specification

Chassis product ID

NCS-55A1-24Q6H

NCS-55A1-24Q6H-SS

Interfaces

24 ports of 1G/10G

24 ports of 1G/10G/25G

6 ports of 40G/100G

24 ports of 1G/10G

24 ports of 1G/10G/25G

6 ports of 40G/100G

Integrated route processor

Cisco IOS XR 64-bit software running on 6-core x86 CPU at 1.9 GHz

Management ports

2x RJ-45 ports for console and management

Flexible forwarding ports

6x 100G with Quad Small Form-Factor Pluggable (QSFP) 28 optics

QSFP+ optics to support 40G; 4x 10G/25G breakout options available

24x 25G with SFP28 optics

24x 10G with SFP28 optics

SFP+ or SFP optics can be supported on SFP28 ports (refer to the optics supported matrix for details)

6x 100G with Quad Small Form-Factor Pluggable (QSFP) 28 optics

QSFP+ optics to support 40G; 4x 10G/25G breakout options available

24x 25G with SFP28 optics

24x 10G with SFP28 optics

SFP+ or SFP optics can be supported on SFP28 ports (refer to the optics supported matrix for details)

System memory

32 GB

SSD drive

128 GB

Timing ports

1 Pulse Per Second (PPS) in/out, 10 MHz in/out, Time of Day (ToD)

Internal Global Navigation Satellite System (GNSS)*

*hardware capable, please check release notes for software support

1 Pulse Per Second (PPS) in/out, 10 MHz in/out, Time of Day (ToD)

Internal Global Navigation Satellite System (GNSS)*

*hardware capable, please check release notes for software support

Performance

Up to 900 Gbps of system throughput

Full line-rate MACsec encryption on 6x 100G ports and 16x 25G ports at 10G/25G/40G/100G speeds

Up to 900 Gbps of system throughput

Full line-rate MACsec encryption on all 6x 100G ports, 24x 10G ports, and 24x 25G ports at 10G/25G/40G/100G speeds

Route scale

Up to 1.1M Forwarding Information Base (FIB) entries

Up to 2M Forwarding Information Base (FIB) entries

Power and cooling features

2 hot-swappable power supplies providing 1+1 redundancy

2 hot-swappable fan trays providing redundant system cooling

2 hot-swappable power supplies providing 1+1 redundancy

2 hot-swappable fan trays providing redundant system cooling

Power consumption

Typical: 330W at 25° Celsius (77°F)

Maximum: 450W at 55° Celsius (131°F)

Typical: 400W at 25° Celsius (77°F)

Maximum: 550W at 55° Celsius (131°F)

Physical specifications

Height: 1RU 1.73 in (4.40 cm)

Width:17.4 in (44.20 cm)

Depth: 21.7 in (55.19 cm)

Weight: 23.8 lb (10.8 kg)

Height: 1RU 1.73 in (4.40 cm)

Width:17.4 in (44.20 cm)

Depth: 21.7 in (55.19 cm)

Weight: 24.7 lb (11.2kg)

Table 3. Software features supported in Cisco IOS XR Software Release 6.6.25 and later

Feature

Specifications

Layer 2

● Layer 2 switch ports

● IEEE 802.1Q VLAN encapsulation/Q-in-Q encapsulation

● IEEE 802.1ad

● Cisco Bundle Ethernet technology (up to 64 ports per Ethernet Bundle)

● Link Aggregation Control Protocol (LACP): IEEE 802.3ad

● Jumbo frames on all ports (up to 9216 bytes)

● Layer 2 ingress Access Control List (ACL)

● Layer 2 AC-AC cross-connect

● Ethernet Flow Point (EFP) and VLAN trunks

● Virtual Router Redundancy Protocol (VRRP)

Layer 3

● IPv4 and IPv6 unicast

● Layer 3 interfaces: Physical and subinterfaces

● Routing protocols: static, Open Shortest Path First (OSPFv2), OSPFv3, Intermediate System to Intermediate System (IS-IS), IS-ISv6, and Border Gateway Protocol (BGP)

● 64-way Equal-Cost Multipath (ECMP)

● Layer 3 ingress and egress IPv4 ACL and IPv6 ACL

● Bidirectional Forwarding Detection (BFD)

● Cisco Ethernet bundle technology (up to 64 ports per Ethernet bundle)

● LACP: IEEE 802.3ad

● Jumbo frame support (up to 9216 bytes)

● VRRP

● Layer 3 VPN

Multiprotocol Label Switching (MPLS)

● Label switching

● Label Distribution Protocol (LDP)

● MPLS Traffic Engineering

● Ethernet over MPLS (EoMPLS)

Segment Routing (SR)

● Segment routing–based transport

● IS-IS extensions to segment routing

● OSPF extensions to segment routing

● BGP egress peering engineering

● Segment Routing Traffic Engineering (SR-TE)

● Segment Routing Topology-Independent Loop Free Alternatives (TI-LFA)

Quality of Service (QoS)

● Hierarchical QoS

● Ingress classification based on Class of Service (Layer 2), IP Differentiated Service Code Point (DSCP) (Layer 3), IP ACL (Layer 3/4), IP precedence (type of service) (Layer 3)

● DSCP marking

● 8 queues for user traffic

● Support for priority queuing

Automation

● Zero-Touch Provisioning (ZTP), iPXE

● Configuration management

● Network Configuration Protocol (NETCONF/YANG model)

Security

● Provides comprehensive network security features, including ACLs; control-plane protection; management plane protection; routing authentications; Authentication, Authorization, and Accounting (AAA) and TACACS+; Secure Shell (SSH) Protocol; Simple Network Management Protocol (SNMP) v3; and Route Policy Language (RPL) support

● Layer 2 ingress ACLs

● Layer 3 ingress ACLs

Management

● MIB, XML, JSON, GPB, and SNMP

● MPLS Operations, Administration, and Maintenance (OAM) (Label Switched Path [LSP] ping, LSP traceroute)

● Ethernet OAM

Table 4. Environmental properties

Property

Specifications

Normal operating temperature

Port-S intake supply: 32° to 104°F (0° to 40°C);

Port-S exhaust supply: 32° to 95°F (0° to 35°C) (NCS-55A1-24Q6H-S only)

Nonoperating (storage) temperature

-40° to 158°F (-40° to 70°C)

Operating humidity

5% to 95% (noncondensing)

Storage (relative) humidity

5% to 95% at 40°C per NEBS GR-63-Core

Altitude

0 to 9842 ft (0 to 3000 m)

Power inputs

Worldwide ranging AC (90 to 265V, 50 to 60 Hz)

Worldwide ranging DC (-40V to -72V)

Airflow

Front to back

Back to front (NCS-55A1-24Q6H-S only)