Interdomain federation, generation or management of a virtual network that extends among domains can be performed without changing a function of a server or a node of a network domain without a function to manage the other domain. 005 to 5% by weight of at least one alkali metal oxide, which has a BET surface area of from 100 to 350 m2g, has a specific DBP number, expressed as DBP number per square meter of specific surface area, greater than or equal to that of a powder which has only the metal oxide component, has the alkali metal oxide distributed in the core and on the surface of the primary particles. When the frame does not meet the first level eligibility criterion and an active aggregation exists for the exchange, then a previous aggregation data unit with an appended header and the received frame are sent to a transport layer for further processing.