August 2018 – QuistED.net

[DC] Cloud Computing

Essential Characteristics
- Broad network access
- Rapid elasticity
- Measured Service
- On-demand Self-service
- Resource pooling
Service Models
- SaaS – Software as a Service
- PaaS – Platform as a Service
- IaaS – Infrastructure as a Service
Deployment Models
- Public
  - Provisitioned for open use by the general public
- Private
  - Cloud for the exclusive use by a single organization
  - Managed by IT or thirdparty
  - on-premise or off-premise
- Hybrid
  - Two or more cloud infrastructures combined
- Community
  - Multiple organisations combined

A precise specification written by providers of a service
You must follow the specification when using that service
An API decribes what functionality is available, how ti must be used and what formats it will accept as input or return as output

Physical requirements
- Power
- Cabling + mgmt0
- Rack and Stack
Power on/Connect to APICs
- How many APICs
- Fabric Name
- Admin Password
- Setup Fabric Network ( IP & VLAN)
Log into the APIC (HTTP out of band)
- NTP
- Route Reflectors
- MGMT IP Fabric
- Leaf and Spine Name/#

Flooding Behavior
- Unknown unicast for mac propagation
- Unicast Flooding reaches all sites
Pseudo-wire Maintenance
- Full mesh of Pseudo-wire is complex
- Head-End replication is a common problem
Multi-Homing
- Requires additional protocols and extends STP
- Malfunctions impact multipe sites