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Avaya Unified Communications Management in Computer Networking is the name of a collection of GUI software programs from Avaya. It uses a service-oriented architecture (SOA) that serves as a foundation forunifying the configuration and monitoring of Avaya Unified Communications Servers and data systems .
On 4 March 2006 the working group posted 802.1aq draft 0.1. [10] In March 2012 the IEEE approved the 802.1aq standard. [11]In May 2013, the first public multivendor interoperability was demonstrated as SPB served as the backbone for Interop 2013 in Las Vegas. [12]
Systems can be made robust by adding redundancy in all potential SPOFs. Redundancy can be achieved at various levels. Redundancy can be achieved at various levels. The assessment of a potential SPOF involves identifying the critical components of a complex system that would provoke a total systems failure in case of malfunction . [ 2 ]
Geographic redundancy corrects the vulnerabilities of redundant devices deployed by geographically separating backup devices. Geographic redundancy reduces the likelihood of events such as power outages, floods, HVAC failures, lightning strikes, tornadoes, building fires, wildfires, and mass shootings disabling most of the system if not the entirety of it.
A LAG is a method of inverse multiplexing over multiple Ethernet links, thereby increasing bandwidth and providing redundancy. It is defined by the IEEE 802.1AX-2008 standard, which states, "Link Aggregation allows one or more links to be aggregated together to form a Link Aggregation Group, such that a MAC client can treat the Link Aggregation Group as if it were a single link."
Disk mirroring (or Redundant Arrays of Independent Disks—RAID) so that failure of internal disks does not result in system crashes. The Distributed Replicated Block Device is one example. Redundant network connections so that single cable, switch, or network interface failures do not result in network outages.
The Virtual Router Redundancy Protocol (VRRP) is a computer networking protocol that provides for automatic assignment of available Internet Protocol (IP) routers to participating hosts. This increases the availability and reliability of routing paths via automatic default gateway selections on an IP subnetwork .
An example is a server chassis that has three power supplies; the system may be set to 2+1 redundancy so that the blades can enjoy the power of two PSUs and have one available to give redundancy if one fails. It is also common to mix live (hot) redundancy where UPSes are online, and cold standby redundancy where they are offline until needed.