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OVNC 2015-성공적인 Customer Optimized Datacenter 구축 방안
This document discusses network virtualization and how it provides virtual-to-physical network abstraction. It describes using logical networks to automate network services provisioning, enable microsegmentation for security, and augment physical network appliances. The key goals of network virtualization are also to make the network simple, scalable, high-bandwidth, fault-tolerant, and quality-of-service providing.
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OVNC 2015-성공적인 Customer Optimized Datacenter 구축 방안
- 2. ⓒ Virtual Network Logical Network VM VM VM LogicalL2 Switch Corpnet/ Internet CloudPhysicalNetwork Gen 2 or SP Cloud Cloud HV1 Cloud HV2 Cloud HV3 1. Automate Network Services Provisioning 2. Micro segmentation to enhance security (DMZ / PCI, etc.) 3. Augment Physical L4-7 Appliances VM VM VM L3Routing/NAT Stateful FW SLB DHCP DNS Redirect IPsec SSLVPN Gateway Services Corpnet/ Internet
- 3. ⓒ Compute Racks InfraRacks Edge Racks WAN Internet L2 L3 Controller Node • Virtual network hypervisor • Massive scale Hypervisor Service Modules • Distributed network services Gateway Software • Integration with existing physical infra. • V to V / V to P
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- 10. ⓒ • Simple • Scalable •High-bandwidth • Fault-tolerant • QoS-providing One of the key goals of network virtualization is to provide virtual-to-physical network abstraction.
- 11. ⓒ Physical Network -Simple • Teaming • Load based • LACP • L3 ToR/leaf • Default GW for VLANs • Allows dynamic routing
- 12. ⓒ • Different typeof racks • Compute: Hypervisors • Infrastructure: management • Edge: Connectivity • Equal-Cost Multipathing • Fixed number of hops • Traffic is TCP/UDP Physical Network - Scalable
- 13. ⓒ • Calculate oversubscription •20x10Gbps servers – leaf • 8x10Gbps leaf – spine • = 2.5:1 • Add uplinks where necessary (ECMP) Physical Network - High-bandwidth
- 14. ⓒ • Protection viarouting protocol • Link failures • Switch downtime (upgrades) Physical Network - Fault-tolerant
- 15. ⓒ • Hypervisor trustedto set QoS • L2: CoS • L3: DSCP • Values kept in VXLAN tunnel Physical Network - QoS-Providing
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- 17. ⓒ ZERO TOUCH NETWORKING(ZTN) The Big Cloud Fabric system provides Zero Touch Networking (ZTN) for switches. ZTN uses the Open Network Install Environment (ONIE) boot loader to automate switch installation and configuration. Fabric switches in the Big Cloud Fabric run the Switch Light OS software, which is bundled with the Big Cloud Fabric software.
- 18. ⓒ • Configure twotenants: Green & Red • Create logical segments for the tenants • Assign workloads to respective logical segments shown below:
- 19. ⓒ • Create Layer3 interface for tenant Green, segment QA • Create System Tenant Router and add default routes on Red and Green tenant routers to point to System Tenant Router • Add system interface to Green and Red tenant routers • Add tenant interfaces to System Tenant Router
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