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.

(1999-11-02)