hello packet

hello packet

(networking, communications)
An OSPF packet sent periodically on each network interface, real or virtual, to discover and test connections to neighbours. Hello packets are multicast on physical networks capable of multicasting or broadcasting to enable dynamic router discovery. They include the parameters that routers connected to a common network must agree on.

Hello packets increase network resilience by, e.g., allowing a router to establish a secondary connection when a primary connection fails.
References in periodicals archive ?
The cluster head (CH) distributes CH Hello Packet (CHP) to neighboring nodes periodically.
4) A HELLO packet may be sent a bit later than expected due to some random delay in processing; thus, we take this into account by using DNT= 1.
Upon receiving a hello packet from a new neighbor, after a random delay, each node replies with its cluster key to the sender encrypted using their pair wise key which can be established by the existing method [23][24].
Initially the nodes will transmit a hello packet to the base station.
In these models, we analytically compute the link probability success between two neighbors as well as the expected number of nodes that correctly receive a Hello packet.
It sends Hello packet every Hello interval to publish its scheduling information too.
Each node that receives the Hello packet computes its distance towards the sink node through the ToA.
The performance of neighbor knowledge method depends upon the exchange of hello packet.
After receiving the hello packet from any sink, it updates new S-HopID according to its current location (section 4.
Hello packet messages are received by its neighborhood node to check whether the sensor nodes are alive.
For the next interval of the data transmission, new hops IDs are assigned through the hello packet broadcasts.