A communication
system having a multiple access segment (2,48), which comprises a plurality of end systems (6,44) and a switching node (4,46) configured such that each
end system can transmit packets to the switching node and such that the switching node can transmit packets which are received by all the end systems. The switching node comprises a switch (5,47) for switching packets from the end systems to intermediate destinations within the
system, and the MA segment operates in accordance with a protocol which provides a
quality of service requested by the end systems for the packets transmitted over the segment. The switching node comprises means for collating primary
label routing information for packets to be transmitted from the end systems across the MA segment which primary
label is dependent on the intermediate destination of the packet and the QoS requirement of the packet and is independent of the
end system from which the packet originates and the switching node switches packets from the end users to the intermediate destinations using only the primary
label.