The invention includes a method and apparatus for disseminating
information in a communication network having a plurality of nodes. The
method includes receiving, in a node, a packet including link-state
advertisements (LSAs) from the communication network and a flooding
status field. Based on the flooding status field, the node determines the
type of LSA received and then re-floods the packet onto the communication
network, based on the type of LSA determined from the flooding status
field. A sub-field in the flooding status field indicates whether the LSA
is intended for distribution to the entire communication network, or is
intended for distribution to other nodes in the communication network
located within a predetermined range of the node. The node prevents
re-flooding of the LSA, if the other nodes in the communication network
are located outside of the predetermined range. The node includes a
re-flood timer which is set to expire based on an urgency level included
in the flooding status field. The node waits for the re-flood timer to
expire and then re-floods the LSA packet from the node onto the
communication network.