Difference between revisions of "CCNP SWITCH/Implementing High Availability in a Campus Network"
From Teknologisk videncenter
m |
m (→Redundancy) |
||
| Line 3: | Line 3: | ||
High availability is technology that enables networkwide resilience to increase IP network availability. Network applications must cross different network segments, from the Enterprise Backbone, Enterprise Edge, and Service Provider Edge, through the Service Provider Core. All segments must be resilient to recover quickly enough for faults to be transparent to users and network applications. | High availability is technology that enables networkwide resilience to increase IP network availability. Network applications must cross different network segments, from the Enterprise Backbone, Enterprise Edge, and Service Provider Edge, through the Service Provider Core. All segments must be resilient to recover quickly enough for faults to be transparent to users and network applications. | ||
==Redundancy== | ==Redundancy== | ||
| + | A redundant design can use several mechanisms to prevent single points of failure: | ||
| + | *Geographic diversity and path diversity are often included. | ||
| + | *Dual devices and links are common, as shown in Figure 5-2. | ||
| + | *Dual WAN providers are common. | ||
| + | *Dual data centers are sometimes used, especially for large companies and large e-commerce sites. | ||
| + | *Dual collocation facilities, dual phone central office facilities, and dual power substations can be implemented. | ||
| + | |||
=Summary= | =Summary= | ||
{{Source cli}} | {{Source cli}} | ||
Revision as of 09:23, 30 August 2011
This article is under development....
Understanding Hign Availability
High availability is technology that enables networkwide resilience to increase IP network availability. Network applications must cross different network segments, from the Enterprise Backbone, Enterprise Edge, and Service Provider Edge, through the Service Provider Core. All segments must be resilient to recover quickly enough for faults to be transparent to users and network applications.
Redundancy
A redundant design can use several mechanisms to prevent single points of failure:
- Geographic diversity and path diversity are often included.
- Dual devices and links are common, as shown in Figure 5-2.
- Dual WAN providers are common.
- Dual data centers are sometimes used, especially for large companies and large e-commerce sites.
- Dual collocation facilities, dual phone central office facilities, and dual power substations can be implemented.