Cisco router CRS-MSC-B Cisco Carrier Routing System / GSR component
Brand: Cisco | Category: Network Equipment
SKU: CSC-CRS-MSC-B | Part #: CRS-MSC-B | MPN: CRS-MSC-B
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About the Cisco router CRS-MSC-B Cisco Carrier Routing System / GSR component
QoS, traffic shaping, BGP/OSPF, and app-aware routing capabilities make the Cisco CRS-MSC-B a critical control-plane and fabric-management component for carrier-grade routing deployments. This Modular Services Card (MSC) serves as the fabric scheduler and arbitration engine within Cisco Carrier Routing System (CRS-1 / CRS-3) chassis, delivering deterministic, non-blocking fabric architecture and coordinating switching fabric interconnect operations across multi-slot line card chassis. Built on the Cisco IOS XR distributed, microkernel-based operating system, the CRS-MSC-B enables process isolation and in-service software upgrades without service interruption.
The card supports comprehensive routing protocols—BGP, OSPF, IS-IS, MPLS, LDP, RSVP-TE, IPv4, and IPv6—enabling flexible, scalable network design for service providers and large enterprises. Hardware-based, distributed line-rate forwarding ensures consistent performance across fabric planes, while built-in high-availability features including stateful switchover (SSO), non-stop routing (NSR), and non-stop forwarding (NSF) meet the availability demands of mission-critical infrastructure. Redundant MSC configurations within the CRS chassis provide fabric-plane resiliency, and multi-chassis scaling capabilities support multi-terabit aggregate throughput for evolving network demands. Network engineers and routing infrastructure architects benefit from genuine Cisco hardware (part number CRS-MSC-B) eligible for Cisco manufacturer support programs, ensuring long-term operational confidence.
Deployment Scenarios
- Service provider backbone routing and traffic engineering across multi-terabit CRS chassis deployments
- High-availability carrier networks requiring in-service software upgrades and non-stop routing during maintenance windows
- Enterprise data center interconnect and WAN edge routing using BGP and MPLS traffic engineering
- Multi-chassis CRS configurations scaling fabric capacity for growing IP and MPLS forwarding demand
- Redundant fabric-plane architectures protecting against single-point-of-failure in core routing infrastructure
Contact Omnixon Global for an RFQ on the Cisco CRS-MSC-B and certified Cisco routing components.
Technical Specifications
| Brand | Cisco |
| Category | Network Equipment |
| SKU | CSC-CRS-MSC-B |
| Part Number | CRS-MSC-B |
| Condition | New |
| Manufacturer Part Number | CRS-MSC-B |
| Product Line | Cisco Carrier Routing System (CRS-1 / CRS-3) |
| Card Type | Modular Services Card (MSC) — Fabric Scheduler and Services Card |
| Software Platform | Cisco IOS XR |
| IOS XR Architecture | Distributed, microkernel-based OS with process isolation and in-service software upgrade (ISSU) support |
| High Availability Features | In-Service Software Upgrade (ISSU), stateful switchover (SSO), non-stop routing (NSR), non-stop forwarding (NSF) |
| Chassis Compatibility | Cisco CRS-1 and CRS-3 line card chassis (LCC) |
| Role in System | Fabric scheduling and arbitration; coordinates switching fabric interconnect within CRS line card chassis |
| Form Factor | Modular blade card for CRS line card chassis slot |
| Routing Protocols Supported | BGP, OSPF, IS-IS, MPLS, LDP, RSVP-TE, IPv4, IPv6 (via IOS XR) |
| Traffic Forwarding | Hardware-based, distributed line-rate forwarding; non-blocking fabric architecture |
| Redundancy | Supports redundant MSC card configurations within the CRS chassis for fabric-plane resiliency |
| Platform Scale | Supports CRS multi-chassis configurations scaling to multi-terabit system aggregate throughput |
| Compliance | Genuine Cisco hardware; eligible for Cisco manufacturer support programs |
Frequently Asked Questions about Cisco router CRS-MSC-B Cisco Carrier Routing System / GSR component
What does the Cisco Cisco router CRS-MSC-B Cisco Carrier Routing System / GSR component do?
The Cisco Cisco router CRS-MSC-B Cisco Carrier Routing System / GSR component is enterprise networking hardware for data-center, campus, and branch deployments. Common roles include core/distribution switching, server uplinks, top-of-rack fabric, and edge connectivity in mixed Cisco/Juniper/Arista environments.
Is the Cisco Cisco router CRS-MSC-B Cisco Carrier Routing System / GSR component compatible with my infrastructure?
The Cisco Cisco router CRS-MSC-B Cisco Carrier Routing System / GSR component interoperates with standard switching protocols (LACP, MLAG/VPC, 802.1Q, OSPF/BGP). For specific cross-vendor scenarios — Cisco-to-Arista MLAG peering, fabric integration with Cumulus/SONiC, or migration from legacy Catalyst — our network engineers map a compatibility plan as part of the RFQ.