The invention includes a method and apparatus for determining a routing
table for use in a network comprising a plurality of type-one nodes and a
plurality of type-two nodes where the type-two nodes use respective
type-two routing tables having one next-hop node associated with each of
a plurality of destination nodes of the network. The method includes
obtaining, from the type-one nodes and the type-two nodes, link status
information associated with each of a plurality of links of the network,
obtaining traffic measurement information from the type-one nodes and the
type-two nodes, and determining, using the link status and traffic
measurement information, type-one routing tables for the respective
type-one nodes. The type-one routing tables are determined as a group in
a substantially coordinated manner, and each type one routing table
includes a plurality of next-hop nodes associated with each of the
destination nodes.