What is meant by hot potato routing  

hi jks system in which packets cannot be buffered and therefore are simply forwarded along - like a hot potato - instead of dropped.

Has applications both on the Internet (where backbone providers do not want to incur the cost of carrying traffic meant for another providers customers and so try to dump the data off as soon as possible) and in optical networks, in which light messages cannot be stored

Answered by laks , an ibibo Master, at 3:55 PM on May 21, 2008

system in which packets cannot be buffered and therefore are simply forwarded along - like a hot potato - instead of dropped.

Has applications both on the Internet (where backbone providers do not want to incur the cost of carrying traffic meant for another providers customers and so try to dump the data off as soon as possible) and in optical networks, in which light messages cannot be stored.

Answered by Sharad Singh , an ibibo Master, at 6:59 PM on May 16, 2008

A system in which packets cannot be buffered and therefore are simply forwarded along - like a hot potato - instead of dropped.

In normal routing situations, when multiple packets contend for a single outgoing channel, packets that are not buffered are dropped to avoid congestion. But in hot potato routing, each packet that is routed is constantly transferred until it reaches its final destination because the individual communication links can not support more than one packet at a time. The packet is bounced around like a "hot potato," sometimes moving further away from its destination because it has to keep moving through the network.

This technique allows multiple packets to reach their destinations without being dropped.

Answered by Shobhit , an ibibo Master, at 7:26 PM on May 15, 2008

hi jks Deflection routing, also known as hot potato routing, is a routing strategy for networks based on packet switching which can reduce the need of buffering packets. Every packet has preferred outputs along which it wants to leave the router, and when possible a packet is sent along one of these outputs. However, two or more packets may want to leave along the same output (which is referred to as a contention among packets), and then only one of the packets may be sent along the link, while the others are sent along available outputs, even though the other links are not preferred by the packets (because, for instance, those links do not yield shortest paths).

Depending on the rate of incoming packets and the capacity of the outgoing links, deflection routing can work without any packet buffering. Of course, it is always possible to simply drop packets in a network with a best effort delivery strategy.

In the jargon of routing technology, hot-potato routing is routing that forwards the packet towards the path with the lowest delay (as opposed, for example, to the more commonly used metric of smallest number of hops
for more inf check source http://en.wikipedia.org/wiki/Hot-po tato_routing

Answered by raj u , an ibibo Master, at 2:31 PM on May 15, 2008

A system in which packets cannot be buffered and therefore are simply forwarded along - like a hot potato - instead of dropped.

Has applications both on the Internet (where backbone providers do not want to incur the cost of carrying traffic meant for another providers customers and so try to dump the data off as soon as possible) and in optical networks, in which light messages cannot be stored.

Answered by ayisha , an ibibo Master, at 5:34 PM on May 14, 2008

A system in which packets cannot be buffered and therefore are simply forwarded along - like a hot potato - instead of dropped.

In normal routing situations, when multiple packets contend for a single outgoing channel, packets that are not buffered are dropped to avoid congestion. But in hot potato routing, each packet that is routed is constantly transferred until it reaches its final destination because the individual communication links can not support more than one packet at a time. The packet is bounced around like a "hot potato," sometimes moving further away from its destination because it has to keep moving through the network.

This technique allows multiple packets to reach their destinations without being dropped.

Answered by Ashish Yadav , an ibibo Wizard, at 6:36 PM on May 13, 2008

well,

Hot potato routing

A system in which packets cannot be buffered and therefore are simply forwarded along - like a hot potato - instead of dropped.

Has applications both on the Internet (where backbone providers do not want to incur the cost of carrying traffic meant for another providers customers and so try to dump the data off as soon as possible) and in optical networks, in which light messages cannot be stored.

Answered by Ajay Pal , an ibibo Master, at 2:51 PM on May 13, 2008

well Jks, Hot potato routing is a form of routing in which the nodes of a network have no buffer to store packets in before they are moved on to their final predetermined destination. In normal routing situations, when multiple packets contend for a single outgoing channel, packets that are not buffered are dropped to avoid congestion. But in hot potato routing, each packet that is routed is constantly transferred until it reaches its final destination because the individual communication links can not support more than one packet at a time.Where traffic flows between a pair of destinations, each is connected
to two transit networks, each of the transit networks has the choice
of sending the traffic to the peering closest to another transit
provider or passing traffic to the peering that advertises the least
cost through the other provider. The former method is called "hot
potato routing" because, like a hot potato held in bare hands,
whoever has it tries to get rid of it quickly.

Answered by Uttam , an ibibo Master, at 1:55 PM on May 13, 2008

Hot potato routing

A system in which packets cannot be buffered and therefore are simply forwarded along - like a hot potato - instead of dropped.

Has applications both on the Internet (where backbone providers do not want to incur the cost of carrying traffic meant for another providers customers and so try to dump the data off as soon as possible) and in optical networks, in which light messages cannot be stored.
Additional resources

Influencing Entrance Selection with a Single ISP
Includes a comparison of hot-potato routing with cold-potato routing.

Costas Busch's Research Statement
Describes his interest in hot-potato routing, including the "greedy algorithm."

Deterministic Many-to-Many Hot Potato Routing
Abstract of an IEEE paper.

Potatoes

Where traffic flows between a pair of destinations, each is connected
to two transit networks, each of the transit networks has the choice
of sending the traffic to the peering closest to another transit
provider or passing traffic to the peering that advertises the least
cost through the other provider. The former method is called "hot
potato routing" because, like a hot potato held in bare hands,
whoever has it tries to get rid of it quickly. Hot potato routing is
accomplished by not passing the EBGP-learned MED into the IBGP. This
minimizes transit traffic for the provider routing the traffic. Far
less common is "cold potato routing", where the transit provider uses
its own transit capacity to get the traffic to the point in the
adjacent transit provider advertised as being closest to the
destination. Cold potato routing is accomplished by passing the
EBGP-learned MED into IBGP.

If one transit provider uses hot potato routing and another uses cold
potato routing, traffic between the two tends to be symmetric.
Depending on the business relationships, if one provider has more
capacity or a significantly less congested transit network, then that
provider may use cold potato routing. The NSF-funded NSFNET backbone

Answered by Mohd Farooq , an ibibo Master, at 11:11 AM on May 13, 2008

Hot potato routing , also known as Deflection routing, is a routing strategy for networks based on packet switching which can reduce the need of buffering packets. Every packet has preferred outputs along which it wants to leave the router, and when possible a packet is sent along one of these outputs. However, two or more packets may want to leave along the same output (which is referred to as a contention among packets), and then only one of the packets may be sent along the link, while the others are sent along available outputs, even though the other links are not preferred by the packets.

Answered by Reeta K , an ibibo Master, at 11:00 AM on May 13, 2008