PLB
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Samar Sharma presents on Pervasive Load-Balancing (PLB), which allows the entire fabric to act as a massive load balancer and telemetry engine. PLB provides benefits like very low CAPEX/OPEX, analytics and telemetry from all switches, an elastic data center, and wire-speed performance. PLB is deployed across the fabric to load balance traffic to devices like firewalls. Show commands and REST APIs provide management and monitoring of PLB services.
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PLB
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- 2. Agenda • Problem statement • PLB Concept • Benefits • Deployment scenarios • Packet flows • Management
- 3. Problem statement • There is no load-balancer today that scales for the East-West traffic • There is no telemetry/analytics solution which is integrated within the Fabric. • There is no load-balancer integrated within the Fabric. Customers have to buy an external load-balancer. • There is no solution to provide recommendations, when to expand/shrink the data center resources
- 4. PLB • Entire fabric acts as a massive load-balancer • Entire fabric acts as a massive telemetry/analytics engine • Clients, servers, L4-L7 appliances can be connected anywhere in the fabric • Fabric could be VXLAN/EVPN/BGP, FabricPath, DFA. • PLB availability – Nexus 7k: Already shipping in NX-OS 8.01 (Atherton) – Nexus 9k: Available for EFT
- 5. Load-balancing Everywhere Clients Servers L4-L7 Appliances Switching Fabric Each entry point acts as load-balancer and telemetry engine
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- 7. PLB Deployment MAN/WAN FW1 FW2 FW3 Loadbalance the traffic to devices, such as Firewalls
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- 9. Benefits : Slide 2 • Platform agnostic, eg, Nexus 9k/7k • Works in VXLAN/EVPN/BGP, FabricPath, DFA fabrics • Synchronization of LB across multiple switches in fabric • Auto-synchronization of failure information • Recommendation system • Seemless addition/removal of servers, appliances. • Works with Virtual and physical devices: VMs, Containers, etc.
- 10. Analytics and Telemetry • PLB sits on the path between clients, servers, L4-L7 services. This is very valuable. – There are a number of clients (local and across border leaf), DB servers, app servers, web servers, firewalls, WAAS, IPS, IDS, video caches, etc. • How much traffic is going to each FW, WAAS, IPS, IDS, server, etc from each device in the fabric. • When does each traffic go high and low.
- 11. Elastic Data Center • Build a truly Elastic Data Center • Based on the Analytics and telemetry, provide details about when/how to grow/shrink the capacity of servers, Firewalls, IPS, WAF, WAAS etc.
- 12. Recommendation System • Based on the Analytics and telemetry, provide recommendations • Provide information about the bottlenecks. • Provide information about when is good time to do system maintenance, eg, upgrade software. • When to charge more money to the tenants.
- 13. Deployment scenarios • Non-DSR SLB • WAAS/WCCP Insertion • Firewall Cluster LB • DSR SLB – Client and server/FW on different subnet – Client and server/FW on same subnet • Firewall Non-Cluster LB
- 14. PLB Configuration CLI Command Description plb Creates a PLB service instance and parameters for it. plb l3-device-group Creates a PLB device group for balancing server or appliance loads. plb statistics Enables PLB statistics function.
- 15. Show commands • show running-config plb-services – Displays the running configuration of all PLB services on a VDC or ToR/leaf switch. • show tech-support plb [detail] – Displays technical support information for PLB. • show plb service – Displays current state of the specified PLB service. • show plb plb-service-name analytics [brief] – Displays detailed analytics of the specified service.
- 16. Management • Puppet/Chef • REST APIs • NX-API • CLI on each switch • DCNM • Others..
- 17. References and more info Config guide http://www.cisco.com/c/en/us/td/docs/switches/datacenter/pf/configuratio n/guide/b-pf-configuration/Forwarding-Configurations.html Command reference guide http://www.cisco.com/c/en/us/td/docs/switches/datacenter/pf/command/re ference/pf-cr-book/Programmable-Fabric-Commands-N-to- Z.html#wp2066246057 Mailer nxos-plb@cisco.com