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# Data Center Deployment Scenarios with Cisco Nexus
## 1. Traditional Three-Tier Architecture
### Components:
- Access Layer: Nexus 9300 series
- Aggregation Layer: Nexus 7000 series
- Core Layer: Nexus 7000 or 9500 series
### Key Considerations:
- VLAN design and distribution
- Spanning Tree Protocol configuration
- Inter-VLAN routing
- Layer 3 routing protocols (OSPF, EIGRP)
- Quality of Service (QoS) implementation
- Security features (ACLs, authentication)
### Deployment Steps:
1. Physical installation and cabling
2. Initial switch configuration (hostnames, management IPs)
3. VLAN configuration and distribution
4. Spanning Tree Protocol optimization
5. Layer 3 routing configuration
6. Implementation of security policies
7. QoS configuration
8. Monitoring and management setup
## 2. Spine-Leaf Architecture
### Components:
- Leaf Switches: Nexus 9300 series
- Spine Switches: Nexus 9500 series
- Border Leaf: Nexus 9300 or 9500 series (for external connectivity)
### Key Considerations:
- Equal-cost multi-path (ECMP) routing
- BGP EVPN for VXLAN overlay
- Underlay network design (IS-IS or OSPF)
- Multi-tenancy and network segmentation
- East-West traffic optimization
- Scalability and future growth
### Deployment Steps:
1. Physical deployment of spine and leaf switches
2. Underlay network configuration (IP addressing, routing protocol)
3. Overlay network setup (VXLAN, EVPN)
4. BGP EVPN configuration on all switches
5. Multi-tenancy configuration (VRFs)
6. External connectivity setup on border leafs
7. Security policy implementation
8. Monitoring and telemetry configuration
## 3. Cisco ACI Fabric
### Components:
- Spine Switches: Nexus 9500 series with ACI-capable line cards
- Leaf Switches: Nexus 9300 series ACI-capable switches
- APICs (Application Policy Infrastructure Controllers)
### Key Considerations:
- Application-centric policy model
- Tenant design and isolation
- Contracts and filters for security
- Integration with existing network infrastructure
- VMware vSphere or Microsoft Hyper-V integration
- Micro-segmentation capabilities
### Deployment Steps:
1. Physical installation of ACI-capable switches and APICs
2. Initial APIC cluster configuration
3. Fabric discovery and registration
4. Tenant creation and VRF configuration
5. Application Network Profile design
6. EPG (Endpoint Group) and contract configuration
7. Integration with virtualization platforms
8. L4-L7 service integration (firewalls, load balancers)
9. External connectivity configuration (L3Out)
## 4. Hybrid Cloud Deployment
### Components:
- On-premises: Nexus 9000 series (for spine-leaf or traditional architecture)
- Cloud Connectivity: Nexus Cloud Services Platform or Cisco Cloud ACI
- Public Cloud: AWS, Azure, or Google Cloud
### Key Considerations:
- Consistent policy across on-premises and cloud environments
- Secure connectivity between data center and cloud (VPN, Direct Connect)
- Network address translation and overlap handling
- Cloud-native services integration
- Hybrid cloud management and orchestration
- Disaster recovery and business continuity planning
### Deployment Steps:
1. On-premises data center setup (following spine-leaf or ACI deployment)
2. Cloud network setup (VPCs, VNets, or VCNs depending on the cloud provider)
3. Establishment of secure connectivity (IPsec VPN or Direct Connect)
4. Configuration of routing between on-premises and cloud (BGP)
5. Implementation of consistent security policies
6. Setup of cloud-based disaster recovery site
7. Configuration of hybrid cloud management platform
8. Testing and validation of hybrid connectivity and applications
## 5. Multi-Site Data Center Interconnect
### Components:
- Site A and Site B: Nexus 9000 series in spine-leaf or ACI architecture
- DCI Links: High-bandwidth, low-latency connections (Dark Fiber, DWDM)
- Edge Devices: Nexus 9500 or ASR 9000 series for MPLS services
### Key Considerations:
- Layer 2 extension technologies (OTV, VXLAN EVPN)
- Layer 3 DCI (LISP, MPLS VPN)
- Consistent policy across sites
- Disaster recovery and business continuity
- Traffic engineering and bandwidth management
- Data replication and synchronization
### Deployment Steps:
1. Individual site deployment (spine-leaf or ACI)
2. DCI link establishment and configuration
3. Layer 2 extension setup (OTV or VXLAN EVPN)
4. Layer 3 routing between sites (BGP, OSPF)
5. Implementation of consistent security policies across sites
6. Configuration of traffic engineering and QoS across DCI
7. Setup of data replication and synchronization mechanisms
8. Disaster recovery and failover testing
## 6. High-Performance Computing (HPC) Cluster
### Components:
- Compute Nodes: High-performance servers
- Storage: High-speed, low-latency storage systems
- Interconnect: Nexus 9300 series with 100G/400G capabilities
### Key Considerations:
- Ultra-low latency requirements
- High-bandwidth demands
- Specialized network protocols (RoCE, iWARP)
- Job scheduling and workload distribution
- Power and cooling management
- Monitoring and performance optimization
### Deployment Steps:
1. Physical installation of HPC nodes and storage systems
2. High-speed interconnect deployment (Nexus 9300)
3. Configuration of low-latency features (cut-through switching, buffer tuning)
4. Setup of specialized protocols (RoCE, iWARP)
5. Integration with job scheduling and workload management systems
6. Implementation of monitoring and telemetry for performance analysis
7. Power and cooling optimization
8. Benchmarking and performance tuning
For each scenario, consider:
- Scalability requirements
- Performance metrics and SLAs
- Security and compliance needs
- Operational management and monitoring
- Backup and disaster recovery strategies
- Future growth and technology evolution
---
1. ACI shifts the focus from network-centric to application-centric configurations: 1. ACI shifts the focus from network-centric to application-centric configurations:
- Traditional networking focuses on configuring individual network devices (switches, routers) and protocols. - Traditional networking focuses on configuring individual network devices (switches, routers) and protocols.
- ACI instead focuses on the applications and their requirements, abstracting away much of the underlying network complexity. - ACI instead focuses on the applications and their requirements, abstracting away much of the underlying network complexity.