metrics
Metric or metrical may refer to:
* Metric system
The metric system is a that succeeded the decimalised system based on the introduced in France in the 1790s. The historical development of these systems culminated in the definition of the ...
used by a router to make routing decisions. A ''metric'' is typically one of many fields in a routing table
In computer networking
A computer network is a set of computer
A computer is a machine that can be programmed to carry out sequences of arithmetic or logical operations automatically. Modern computers can perform generic sets of oper ...
. Router metrics help the router choose the best route among multiple feasible routes to a destination. The route will go in the direction of the gateway with the lowest metric.
A router metric is typically based on information such as path length, bandwidth
Bandwidth commonly refers to:
* Bandwidth (signal processing) or ''analog bandwidth'', ''frequency bandwidth'', or ''radio bandwidth'', a measure of the width of a frequency range
* Bandwidth (computing), the rate of data transfer, bit rate or thr ...
, load
Load or LOAD may refer to:
Aeronautics and transportation
*Load factor (aeronautics), the ratio of the lift of an aircraft to its weight
*Passenger load factor, the ratio of revenue passenger miles to available seat miles of a particular transpo ...
, hop count
In wired computer networking, including the Internet, a hop occurs when a packet is passed from one network segment to the next. Data packets pass through Router (computing), routers as they travel between source and destination. The hop count ...
, path cost, delay
Delay (from Latin: dilatio) may refer to:
Arts, entertainment, and media
* ''Delay 1968'', a 1981 album by German experimental rock band Can
* ''The Delay'', a 2012 Uruguayan film
People
* B. H. DeLay (1891–1923), American aviator and acto ...
, maximum transmission unit
In computer networking, the maximum transmission unit (MTU) is the size of the largest protocol data unit (PDU) that can be communicated in a single network layer transaction. The MTU relates to, but is not identical to the maximum Frame (networki ...
(MTU), reliability
Reliability, reliable, or unreliable may refer to:
Science, technology, and mathematics Computing
* Data reliability (disambiguation), Data reliability, a property of some disk arrays in computer storage
* High availability
* Reliability (computer ...
and communications cost.
Examples
A metric can include: * measuring link utilization (using SNMP) * number of hops (hop count
In wired computer networking, including the Internet, a hop occurs when a packet is passed from one network segment to the next. Data packets pass through Router (computing), routers as they travel between source and destination. The hop count ...
)
* speed of the path
* packet loss (router congestion/conditions)
* Network delay
Network delay is a design and performance characteristic of a telecommunications network
A telecommunications network is a group of nodes
In general, a node is a localized swelling (a "knot") or a point of intersection (a Vertex (graph theory) ...
* path reliability
* path bandwidth
Bandwidth commonly refers to:
* Bandwidth (signal processing) or ''analog bandwidth'', ''frequency bandwidth'', or ''radio bandwidth'', a measure of the width of a frequency range
* Bandwidth (computing), the rate of data transfer, bit rate or thr ...
* throughput NMP - query routers* load
Load or LOAD may refer to:
Aeronautics and transportation
*Load factor (aeronautics), the ratio of the lift of an aircraft to its weight
*Passenger load factor, the ratio of revenue passenger miles to available seat miles of a particular transpo ...
* Maximum transmission unit
In computer networking, the maximum transmission unit (MTU) is the size of the largest protocol data unit (PDU) that can be communicated in a single network layer transaction. The MTU relates to, but is not identical to the maximum Frame (networki ...
(MTU)
* administrator configured value
In EIGRP
Enhanced Interior Gateway Routing Protocol (EIGRP) is an advanced distance-vector routing protocol that is used on a computer network for automating routing decisions and configuration. The protocol was designed by Cisco Systems as a proprietary pr ...
, metrics is represented by an integer from 0 to 4,294,967,295 (The size of a 32-bit integer). In Microsoft Windows XP
Windows XP is a major release of the Windows NT
Windows NT is a proprietary
{{Short pages monitor